feat(smart-app): implement complete mobile app MVP

- App.tsx: full navigation (Auth stack + Main tabs with 5 screens)
- Auth: LoginScreen, RegisterScreen, ForgotPasswordScreen
- HomeScreen: dashboard with IoT metrics, weather widget, alerts, quick actions, sensors
- MapScreen: interactive map with layer toggles (6 layers)
- MarketplaceScreen: categories (6), products (5), search
- ChatScreen: AI chat with quick prompts (4), bot responses
- ProfileScreen: user info, stats, menu (9 items), logout
- AlertsScreen: alert list with severity, acknowledge
- SensorsScreen: sensor list with type filters (6 types), search
- ZonesScreen: zone cards with stats
- SettingsScreen: language picker (FR/EN/ES/DE), privacy, about
- Stores: iotStore (sensors, zones, alerts), notificationStore, uiStore + i18n
- Hooks: useSensors, useAlerts, useNotifications, useLocation
- Components: Card, Button, LoadingSpinner, ErrorBoundary, Header
- Services: iotService, notificationService (with axios API client)
- Utils: formatters (temp, AQI, noise, dates), validators (email, password, IBAN)
- Theme: colors.ts with full design system (Blue Ocean palette)
- Ditto: fixed MongoDB connection, new JWT secrets, official gateway image

smart-app-city/frontend/node_modules/js-yaml/LICENSE

@@ -0,0 +1,21 @@
+(The MIT License)
+
+Copyright (C) 2011-2015 by Vitaly Puzrin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

smart-app-city/frontend/node_modules/js-yaml/README.md

@@ -0,0 +1,231 @@
+JS-YAML - YAML 1.2 parser / writer for JavaScript
+=================================================
+
+[![CI](https://github.com/nodeca/js-yaml/actions/workflows/ci.yml/badge.svg)](https://github.com/nodeca/js-yaml/actions/workflows/ci.yml)
+[![NPM version](https://img.shields.io/npm/v/js-yaml.svg)](https://www.npmjs.org/package/js-yaml)
+
+__[Online Demo](https://nodeca.github.io/js-yaml/)__
+
+
+This is an implementation of [YAML](https://yaml.org/), a human-friendly data
+serialization language. Started as [PyYAML](https://pyyaml.org/) port, it was
+completely rewritten from scratch. Now it's very fast, and supports 1.2 spec.
+
+
+Installation
+------------
+
+### YAML module for node.js
+
+```
+npm install js-yaml
+```
+
+
+### CLI executable
+
+If you want to inspect your YAML files from CLI, install js-yaml globally:
+
+```
+npm install -g js-yaml
+```
+
+#### Usage
+
+```
+usage: js-yaml [-h] [-v] [-c] [-t] file
+
+Positional arguments:
+  file           File with YAML document(s)
+
+Optional arguments:
+  -h, --help     Show this help message and exit.
+  -v, --version  Show program's version number and exit.
+  -c, --compact  Display errors in compact mode
+  -t, --trace    Show stack trace on error
+```
+
+
+API
+---
+
+Here we cover the most 'useful' methods. If you need advanced details (creating
+your own tags), see [examples](https://github.com/nodeca/js-yaml/tree/master/examples)
+for more info.
+
+``` javascript
+const yaml = require('js-yaml');
+const fs   = require('fs');
+
+// Get document, or throw exception on error
+try {
+  const doc = yaml.load(fs.readFileSync('/home/ixti/example.yml', 'utf8'));
+  console.log(doc);
+} catch (e) {
+  console.log(e);
+}
+```
+
+
+### load (string [ , options ])
+
+Parses `string` as single YAML document. Returns either a
+plain object, a string, a number, `null` or `undefined`, or throws `YAMLException` on error. By default, does
+not support regexps, functions and undefined.
+
+options:
+
+- `filename` _(default: null)_ - string to be used as a file path in
+  error/warning messages.
+- `onWarning` _(default: null)_ - function to call on warning messages.
+  Loader will call this function with an instance of `YAMLException` for each warning.
+- `schema` _(default: `DEFAULT_SCHEMA`)_ - specifies a schema to use.
+  - `FAILSAFE_SCHEMA` - only strings, arrays and plain objects:
+    https://www.yaml.org/spec/1.2/spec.html#id2802346
+  - `JSON_SCHEMA` - all JSON-supported types:
+    https://www.yaml.org/spec/1.2/spec.html#id2803231
+  - `CORE_SCHEMA` - same as `JSON_SCHEMA`:
+    https://www.yaml.org/spec/1.2/spec.html#id2804923
+  - `DEFAULT_SCHEMA` - all supported YAML types.
+- `json` _(default: false)_ - compatibility with JSON.parse behaviour. If true, then duplicate keys in a mapping will override values rather than throwing an error.
+- `maxDepth` _(default: 100)_ - limits nesting depth for collections.
+- `maxMergeSeqLength` _(default: 20)_ - limits the number of elements in merge
+  (`<<`) sequences.
+
+NOTE: This function **does not** understand multi-document sources, it throws
+exception on those.
+
+NOTE: JS-YAML **does not** support schema-specific tag resolution restrictions.
+So, the JSON schema is not as strictly defined in the YAML specification.
+It allows numbers in any notation, use `Null` and `NULL` as `null`, etc.
+The core schema also has no such restrictions. It allows binary notation for integers.
+
+
+### loadAll (string [, iterator] [, options ])
+
+Same as `load()`, but understands multi-document sources. Applies
+`iterator` to each document if specified, or returns array of documents.
+
+``` javascript
+const yaml = require('js-yaml');
+
+yaml.loadAll(data, function (doc) {
+  console.log(doc);
+});
+```
+
+
+### dump (object [ , options ])
+
+Serializes `object` as a YAML document. Uses `DEFAULT_SCHEMA`, so it will
+throw an exception if you try to dump regexps or functions. However, you can
+disable exceptions by setting the `skipInvalid` option to `true`.
+
+options:
+
+- `indent` _(default: 2)_ - indentation width to use (in spaces).
+- `noArrayIndent` _(default: false)_ - when true, will not add an indentation level to array elements
+- `skipInvalid` _(default: false)_ - do not throw on invalid types (like function
+  in the safe schema) and skip pairs and single values with such types.
+- `flowLevel` _(default: -1)_ - specifies level of nesting, when to switch from
+  block to flow style for collections. -1 means block style everwhere
+- `styles` - "tag" => "style" map. Each tag may have own set of styles.
+- `schema` _(default: `DEFAULT_SCHEMA`)_ specifies a schema to use.
+- `sortKeys` _(default: `false`)_ - if `true`, sort keys when dumping YAML. If a
+  function, use the function to sort the keys.
+- `lineWidth` _(default: `80`)_ - set max line width. Set `-1` for unlimited width.
+- `noRefs` _(default: `false`)_ - if `true`, don't convert duplicate objects into references
+- `noCompatMode` _(default: `false`)_ - if `true` don't try to be compatible with older
+  yaml versions. Currently: don't quote "yes", "no" and so on, as required for YAML 1.1
+- `condenseFlow` _(default: `false`)_ - if `true` flow sequences will be condensed, omitting the space between `a, b`. Eg. `'[a,b]'`, and omitting the space between `key: value` and quoting the key. Eg. `'{"a":b}'` Can be useful when using yaml for pretty URL query params as spaces are %-encoded.
+- `quotingType` _(`'` or `"`, default: `'`)_ - strings will be quoted using this quoting style. If you specify single quotes, double quotes will still be used for non-printable characters.
+- `forceQuotes` _(default: `false`)_ - if `true`, all non-key strings will be quoted even if they normally don't need to.
+- `replacer` - callback `function (key, value)` called recursively on each key/value in source object (see `replacer` docs for `JSON.stringify`).
+
+The following table show availlable styles (e.g. "canonical",
+"binary"...) available for each tag (.e.g. !!null, !!int ...). Yaml
+output is shown on the right side after `=>` (default setting) or `->`:
+
+``` none
+!!null
+  "canonical"   -> "~"
+  "lowercase"   => "null"
+  "uppercase"   -> "NULL"
+  "camelcase"   -> "Null"
+  "empty"       -> ""
+
+!!int
+  "binary"      -> "0b1", "0b101010", "0b1110001111010"
+  "octal"       -> "0o1", "0o52", "0o16172"
+  "decimal"     => "1", "42", "7290"
+  "hexadecimal" -> "0x1", "0x2A", "0x1C7A"
+
+!!bool
+  "lowercase"   => "true", "false"
+  "uppercase"   -> "TRUE", "FALSE"
+  "camelcase"   -> "True", "False"
+
+!!float
+  "lowercase"   => ".nan", '.inf'
+  "uppercase"   -> ".NAN", '.INF'
+  "camelcase"   -> ".NaN", '.Inf'
+```
+
+Example:
+
+``` javascript
+dump(object, {
+  'styles': {
+    '!!null': 'canonical' // dump null as ~
+  },
+  'sortKeys': true        // sort object keys
+});
+```
+
+Supported YAML types
+--------------------
+
+The list of standard YAML tags and corresponding JavaScript types. See also
+[YAML tag discussion](https://pyyaml.org/wiki/YAMLTagDiscussion) and
+[YAML types repository](https://yaml.org/type/).
+
+```
+!!null ''                   # null
+!!bool 'yes'                # bool
+!!int '3...'                # number
+!!float '3.14...'           # number
+!!binary '...base64...'     # buffer
+!!timestamp 'YYYY-...'      # date
+!!omap [ ... ]              # array of key-value pairs
+!!pairs [ ... ]             # array or array pairs
+!!set { ... }               # array of objects with given keys and null values
+!!str '...'                 # string
+!!seq [ ... ]               # array
+!!map { ... }               # object
+```
+
+**JavaScript-specific tags**
+
+See [js-yaml-js-types](https://github.com/nodeca/js-yaml-js-types) for
+extra types.
+
+
+Caveats
+-------
+
+Note, that you use arrays or objects as key in JS-YAML. JS does not allow objects
+or arrays as keys, and stringifies (by calling `toString()` method) them at the
+moment of adding them.
+
+``` yaml
+---
+? [ foo, bar ]
+: - baz
+? { foo: bar }
+: - baz
+  - baz
+```
+
+``` javascript
+{ "foo,bar": ["baz"], "[object Object]": ["baz", "baz"] }
+```

smart-app-city/frontend/node_modules/js-yaml/bin/js-yaml.js

@@ -0,0 +1,117 @@
+#!/usr/bin/env node
+
+'use strict'
+
+const fs = require('fs')
+const argparse = require('argparse')
+const yaml = require('..')
+
+/// /////////////////////////////////////////////////////////////////////////////
+
+const cli = new argparse.ArgumentParser({
+  prog: 'js-yaml',
+  add_help: true
+})
+
+cli.add_argument('-v', '--version', {
+  action: 'version',
+  version: require('../package.json').version
+})
+
+cli.add_argument('-c', '--compact', {
+  help: 'Display errors in compact mode',
+  action: 'store_true'
+})
+
+// deprecated (not needed after we removed output colors)
+// option suppressed, but not completely removed for compatibility
+cli.add_argument('-j', '--to-json', {
+  help: argparse.SUPPRESS,
+  dest: 'json',
+  action: 'store_true'
+})
+
+cli.add_argument('-t', '--trace', {
+  help: 'Show stack trace on error',
+  action: 'store_true'
+})
+
+cli.add_argument('file', {
+  help: 'File to read, utf-8 encoded without BOM',
+  nargs: '?',
+  default: '-'
+})
+
+/// /////////////////////////////////////////////////////////////////////////////
+
+const options = cli.parse_args()
+
+/// /////////////////////////////////////////////////////////////////////////////
+
+function readFile (filename, encoding, callback) {
+  if (options.file === '-') {
+    // read from stdin
+
+    const chunks = []
+
+    process.stdin.on('data', function (chunk) {
+      chunks.push(chunk)
+    })
+
+    process.stdin.on('end', function () {
+      return callback(null, Buffer.concat(chunks).toString(encoding))
+    })
+  } else {
+    fs.readFile(filename, encoding, callback)
+  }
+}
+
+readFile(options.file, 'utf8', function (error, input) {
+  let output
+  let isYaml
+
+  if (error) {
+    if (error.code === 'ENOENT') {
+      console.error('File not found: ' + options.file)
+      process.exit(2)
+    }
+
+    console.error(
+      (options.trace && error.stack) ||
+      error.message ||
+      String(error))
+
+    process.exit(1)
+  }
+
+  try {
+    output = JSON.parse(input)
+    isYaml = false
+  } catch (err) {
+    if (err instanceof SyntaxError) {
+      try {
+        output = []
+        yaml.loadAll(input, function (doc) { output.push(doc) }, {})
+        isYaml = true
+
+        if (output.length === 0) output = null
+        else if (output.length === 1) output = output[0]
+      } catch (e) {
+        if (options.trace && err.stack) console.error(e.stack)
+        else console.error(e.toString(options.compact))
+
+        process.exit(1)
+      }
+    } else {
+      console.error(
+        (options.trace && err.stack) ||
+        err.message ||
+        String(err))
+
+      process.exit(1)
+    }
+  }
+
+  if (isYaml) console.log(JSON.stringify(output, null, '  '))
+  else console.log(yaml.dump(output))
+})

smart-app-city/frontend/node_modules/js-yaml/index.js

@@ -0,0 +1,44 @@
+'use strict'
+
+const loader = require('./lib/loader')
+const dumper = require('./lib/dumper')
+
+function renamed (from, to) {
+  return function () {
+    throw new Error('Function yaml.' + from + ' is removed in js-yaml 4. ' +
+      'Use yaml.' + to + ' instead, which is now safe by default.')
+  }
+}
+
+module.exports.Type = require('./lib/type')
+module.exports.Schema = require('./lib/schema')
+module.exports.FAILSAFE_SCHEMA = require('./lib/schema/failsafe')
+module.exports.JSON_SCHEMA = require('./lib/schema/json')
+module.exports.CORE_SCHEMA = require('./lib/schema/core')
+module.exports.DEFAULT_SCHEMA = require('./lib/schema/default')
+module.exports.load = loader.load
+module.exports.loadAll = loader.loadAll
+module.exports.dump = dumper.dump
+module.exports.YAMLException = require('./lib/exception')
+
+// Re-export all types in case user wants to create custom schema
+module.exports.types = {
+  binary: require('./lib/type/binary'),
+  float: require('./lib/type/float'),
+  map: require('./lib/type/map'),
+  null: require('./lib/type/null'),
+  pairs: require('./lib/type/pairs'),
+  set: require('./lib/type/set'),
+  timestamp: require('./lib/type/timestamp'),
+  bool: require('./lib/type/bool'),
+  int: require('./lib/type/int'),
+  merge: require('./lib/type/merge'),
+  omap: require('./lib/type/omap'),
+  seq: require('./lib/type/seq'),
+  str: require('./lib/type/str')
+}
+
+// Removed functions from JS-YAML 3.0.x
+module.exports.safeLoad = renamed('safeLoad', 'load')
+module.exports.safeLoadAll = renamed('safeLoadAll', 'loadAll')
+module.exports.safeDump = renamed('safeDump', 'dump')

smart-app-city/frontend/node_modules/js-yaml/lib/common.js

@@ -0,0 +1,50 @@
+'use strict'
+
+function isNothing (subject) {
+  return (typeof subject === 'undefined') || (subject === null)
+}
+
+function isObject (subject) {
+  return (typeof subject === 'object') && (subject !== null)
+}
+
+function toArray (sequence) {
+  if (Array.isArray(sequence)) return sequence
+  else if (isNothing(sequence)) return []
+
+  return [sequence]
+}
+
+function extend (target, source) {
+  if (source) {
+    const sourceKeys = Object.keys(source)
+
+    for (let index = 0, length = sourceKeys.length; index < length; index += 1) {
+      const key = sourceKeys[index]
+      target[key] = source[key]
+    }
+  }
+
+  return target
+}
+
+function repeat (string, count) {
+  let result = ''
+
+  for (let cycle = 0; cycle < count; cycle += 1) {
+    result += string
+  }
+
+  return result
+}
+
+function isNegativeZero (number) {
+  return (number === 0) && (Number.NEGATIVE_INFINITY === 1 / number)
+}
+
+module.exports.isNothing = isNothing
+module.exports.isObject = isObject
+module.exports.toArray = toArray
+module.exports.repeat = repeat
+module.exports.isNegativeZero = isNegativeZero
+module.exports.extend = extend

smart-app-city/frontend/node_modules/js-yaml/lib/dumper.js

@@ -0,0 +1,937 @@
+'use strict'
+
+const common = require('./common')
+const YAMLException = require('./exception')
+const DEFAULT_SCHEMA = require('./schema/default')
+
+const _toString = Object.prototype.toString
+const _hasOwnProperty = Object.prototype.hasOwnProperty
+
+const CHAR_BOM = 0xFEFF
+const CHAR_TAB = 0x09 /* Tab */
+const CHAR_LINE_FEED = 0x0A /* LF */
+const CHAR_CARRIAGE_RETURN = 0x0D /* CR */
+const CHAR_SPACE = 0x20 /* Space */
+const CHAR_EXCLAMATION = 0x21 /* ! */
+const CHAR_DOUBLE_QUOTE = 0x22 /* " */
+const CHAR_SHARP = 0x23 /* # */
+const CHAR_PERCENT = 0x25 /* % */
+const CHAR_AMPERSAND = 0x26 /* & */
+const CHAR_SINGLE_QUOTE = 0x27 /* ' */
+const CHAR_ASTERISK = 0x2A /* * */
+const CHAR_COMMA = 0x2C /* , */
+const CHAR_MINUS = 0x2D /* - */
+const CHAR_COLON = 0x3A /* : */
+const CHAR_EQUALS = 0x3D /* = */
+const CHAR_GREATER_THAN = 0x3E /* > */
+const CHAR_QUESTION = 0x3F /* ? */
+const CHAR_COMMERCIAL_AT = 0x40 /* @ */
+const CHAR_LEFT_SQUARE_BRACKET = 0x5B /* [ */
+const CHAR_RIGHT_SQUARE_BRACKET = 0x5D /* ] */
+const CHAR_GRAVE_ACCENT = 0x60 /* ` */
+const CHAR_LEFT_CURLY_BRACKET = 0x7B /* { */
+const CHAR_VERTICAL_LINE = 0x7C /* | */
+const CHAR_RIGHT_CURLY_BRACKET = 0x7D /* } */
+
+const ESCAPE_SEQUENCES = {}
+
+ESCAPE_SEQUENCES[0x00] = '\\0'
+ESCAPE_SEQUENCES[0x07] = '\\a'
+ESCAPE_SEQUENCES[0x08] = '\\b'
+ESCAPE_SEQUENCES[0x09] = '\\t'
+ESCAPE_SEQUENCES[0x0A] = '\\n'
+ESCAPE_SEQUENCES[0x0B] = '\\v'
+ESCAPE_SEQUENCES[0x0C] = '\\f'
+ESCAPE_SEQUENCES[0x0D] = '\\r'
+ESCAPE_SEQUENCES[0x1B] = '\\e'
+ESCAPE_SEQUENCES[0x22] = '\\"'
+ESCAPE_SEQUENCES[0x5C] = '\\\\'
+ESCAPE_SEQUENCES[0x85] = '\\N'
+ESCAPE_SEQUENCES[0xA0] = '\\_'
+ESCAPE_SEQUENCES[0x2028] = '\\L'
+ESCAPE_SEQUENCES[0x2029] = '\\P'
+
+const DEPRECATED_BOOLEANS_SYNTAX = [
+  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',
+  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'
+]
+
+const DEPRECATED_BASE60_SYNTAX = /^[-+]?[0-9_]+(?::[0-9_]+)+(?:\.[0-9_]*)?$/
+
+function compileStyleMap (schema, map) {
+  if (map === null) return {}
+
+  const result = {}
+  const keys = Object.keys(map)
+
+  for (let index = 0, length = keys.length; index < length; index += 1) {
+    let tag = keys[index]
+    let style = String(map[tag])
+
+    if (tag.slice(0, 2) === '!!') {
+      tag = 'tag:yaml.org,2002:' + tag.slice(2)
+    }
+    const type = schema.compiledTypeMap['fallback'][tag]
+
+    if (type && _hasOwnProperty.call(type.styleAliases, style)) {
+      style = type.styleAliases[style]
+    }
+
+    result[tag] = style
+  }
+
+  return result
+}
+
+function encodeHex (character) {
+  let handle
+  let length
+
+  const string = character.toString(16).toUpperCase()
+
+  if (character <= 0xFF) {
+    handle = 'x'
+    length = 2
+  } else if (character <= 0xFFFF) {
+    handle = 'u'
+    length = 4
+  } else if (character <= 0xFFFFFFFF) {
+    handle = 'U'
+    length = 8
+  } else {
+    throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF')
+  }
+
+  return '\\' + handle + common.repeat('0', length - string.length) + string
+}
+
+const QUOTING_TYPE_SINGLE = 1
+const QUOTING_TYPE_DOUBLE = 2
+
+function State (options) {
+  this.schema = options['schema'] || DEFAULT_SCHEMA
+  this.indent = Math.max(1, (options['indent'] || 2))
+  this.noArrayIndent = options['noArrayIndent'] || false
+  this.skipInvalid = options['skipInvalid'] || false
+  this.flowLevel = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel'])
+  this.styleMap = compileStyleMap(this.schema, options['styles'] || null)
+  this.sortKeys = options['sortKeys'] || false
+  this.lineWidth = options['lineWidth'] || 80
+  this.noRefs = options['noRefs'] || false
+  this.noCompatMode = options['noCompatMode'] || false
+  this.condenseFlow = options['condenseFlow'] || false
+  this.quotingType = options['quotingType'] === '"' ? QUOTING_TYPE_DOUBLE : QUOTING_TYPE_SINGLE
+  this.forceQuotes = options['forceQuotes'] || false
+  this.replacer = typeof options['replacer'] === 'function' ? options['replacer'] : null
+
+  this.implicitTypes = this.schema.compiledImplicit
+  this.explicitTypes = this.schema.compiledExplicit
+
+  this.tag = null
+  this.result = ''
+
+  this.duplicates = []
+  this.usedDuplicates = null
+}
+
+// Indents every line in a string. Empty lines (\n only) are not indented.
+function indentString (string, spaces) {
+  const ind = common.repeat(' ', spaces)
+  let position = 0
+  let result = ''
+  const length = string.length
+
+  while (position < length) {
+    let line
+    const next = string.indexOf('\n', position)
+    if (next === -1) {
+      line = string.slice(position)
+      position = length
+    } else {
+      line = string.slice(position, next + 1)
+      position = next + 1
+    }
+
+    if (line.length && line !== '\n') result += ind
+
+    result += line
+  }
+
+  return result
+}
+
+function generateNextLine (state, level) {
+  return '\n' + common.repeat(' ', state.indent * level)
+}
+
+function testImplicitResolving (state, str) {
+  for (let index = 0, length = state.implicitTypes.length; index < length; index += 1) {
+    const type = state.implicitTypes[index]
+
+    if (type.resolve(str)) {
+      return true
+    }
+  }
+
+  return false
+}
+
+// [33] s-white ::= s-space | s-tab
+function isWhitespace (c) {
+  return c === CHAR_SPACE || c === CHAR_TAB
+}
+
+// Returns true if the character can be printed without escaping.
+// From YAML 1.2: "any allowed characters known to be non-printable
+// should also be escaped. [However,] This isn’t mandatory"
+// Derived from nb-char - \t - #x85 - #xA0 - #x2028 - #x2029.
+function isPrintable (c) {
+  return (c >= 0x00020 && c <= 0x00007E) ||
+    ((c >= 0x000A1 && c <= 0x00D7FF) && c !== 0x2028 && c !== 0x2029) ||
+    ((c >= 0x0E000 && c <= 0x00FFFD) && c !== CHAR_BOM) ||
+    (c >= 0x10000 && c <= 0x10FFFF)
+}
+
+// [34] ns-char ::= nb-char - s-white
+// [27] nb-char ::= c-printable - b-char - c-byte-order-mark
+// [26] b-char  ::= b-line-feed | b-carriage-return
+// Including s-white (for some reason, examples doesn't match specs in this aspect)
+// ns-char ::= c-printable - b-line-feed - b-carriage-return - c-byte-order-mark
+function isNsCharOrWhitespace (c) {
+  return isPrintable(c) &&
+    c !== CHAR_BOM &&
+    // - b-char
+    c !== CHAR_CARRIAGE_RETURN &&
+    c !== CHAR_LINE_FEED
+}
+
+// [127]  ns-plain-safe(c) ::= c = flow-out  ⇒ ns-plain-safe-out
+//                             c = flow-in   ⇒ ns-plain-safe-in
+//                             c = block-key ⇒ ns-plain-safe-out
+//                             c = flow-key  ⇒ ns-plain-safe-in
+// [128] ns-plain-safe-out ::= ns-char
+// [129]  ns-plain-safe-in ::= ns-char - c-flow-indicator
+// [130]  ns-plain-char(c) ::=  ( ns-plain-safe(c) - “:” - “#” )
+//                            | ( /* An ns-char preceding */ “#” )
+//                            | ( “:” /* Followed by an ns-plain-safe(c) */ )
+function isPlainSafe (c, prev, inblock) {
+  const cIsNsCharOrWhitespace = isNsCharOrWhitespace(c)
+  const cIsNsChar = cIsNsCharOrWhitespace && !isWhitespace(c)
+  return (
+    (
+      // ns-plain-safe
+      inblock // c = flow-in
+        ? cIsNsCharOrWhitespace
+        : cIsNsCharOrWhitespace &&
+          // - c-flow-indicator
+          c !== CHAR_COMMA &&
+          c !== CHAR_LEFT_SQUARE_BRACKET &&
+          c !== CHAR_RIGHT_SQUARE_BRACKET &&
+          c !== CHAR_LEFT_CURLY_BRACKET &&
+          c !== CHAR_RIGHT_CURLY_BRACKET
+    ) &&
+    // ns-plain-char
+    c !== CHAR_SHARP && // false on '#'
+    !(prev === CHAR_COLON && !cIsNsChar)
+  ) || // false on ': '
+  (isNsCharOrWhitespace(prev) && !isWhitespace(prev) && c === CHAR_SHARP) || // change to true on '[^ ]#'
+  (prev === CHAR_COLON && cIsNsChar) // change to true on ':[^ ]'
+}
+
+// Simplified test for values allowed as the first character in plain style.
+function isPlainSafeFirst (c) {
+  // Uses a subset of ns-char - c-indicator
+  // where ns-char = nb-char - s-white.
+  // No support of ( ( “?” | “:” | “-” ) /* Followed by an ns-plain-safe(c)) */ ) part
+  return isPrintable(c) &&
+    c !== CHAR_BOM &&
+    !isWhitespace(c) && // - s-white
+    // - (c-indicator ::=
+    // “-” | “?” | “:” | “,” | “[” | “]” | “{” | “}”
+    c !== CHAR_MINUS &&
+    c !== CHAR_QUESTION &&
+    c !== CHAR_COLON &&
+    c !== CHAR_COMMA &&
+    c !== CHAR_LEFT_SQUARE_BRACKET &&
+    c !== CHAR_RIGHT_SQUARE_BRACKET &&
+    c !== CHAR_LEFT_CURLY_BRACKET &&
+    c !== CHAR_RIGHT_CURLY_BRACKET &&
+    // | “#” | “&” | “*” | “!” | “|” | “=” | “>” | “'” | “"”
+    c !== CHAR_SHARP &&
+    c !== CHAR_AMPERSAND &&
+    c !== CHAR_ASTERISK &&
+    c !== CHAR_EXCLAMATION &&
+    c !== CHAR_VERTICAL_LINE &&
+    c !== CHAR_EQUALS &&
+    c !== CHAR_GREATER_THAN &&
+    c !== CHAR_SINGLE_QUOTE &&
+    c !== CHAR_DOUBLE_QUOTE &&
+    // | “%” | “@” | “`”)
+    c !== CHAR_PERCENT &&
+    c !== CHAR_COMMERCIAL_AT &&
+    c !== CHAR_GRAVE_ACCENT
+}
+
+// Simplified test for values allowed as the last character in plain style.
+function isPlainSafeLast (c) {
+  // just not whitespace or colon, it will be checked to be plain character later
+  return !isWhitespace(c) && c !== CHAR_COLON
+}
+
+// Same as 'string'.codePointAt(pos), but works in older browsers.
+function codePointAt (string, pos) {
+  const first = string.charCodeAt(pos)
+  let second
+
+  if (first >= 0xD800 && first <= 0xDBFF && pos + 1 < string.length) {
+    second = string.charCodeAt(pos + 1)
+    if (second >= 0xDC00 && second <= 0xDFFF) {
+      // https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
+      return (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000
+    }
+  }
+  return first
+}
+
+// Determines whether block indentation indicator is required.
+function needIndentIndicator (string) {
+  const leadingSpaceRe = /^\n* /
+  return leadingSpaceRe.test(string)
+}
+
+const STYLE_PLAIN = 1
+const STYLE_SINGLE = 2
+const STYLE_LITERAL = 3
+const STYLE_FOLDED = 4
+const STYLE_DOUBLE = 5
+
+// Determines which scalar styles are possible and returns the preferred style.
+// lineWidth = -1 => no limit.
+// Pre-conditions: str.length > 0.
+// Post-conditions:
+//    STYLE_PLAIN or STYLE_SINGLE => no \n are in the string.
+//    STYLE_LITERAL => no lines are suitable for folding (or lineWidth is -1).
+//    STYLE_FOLDED => a line > lineWidth and can be folded (and lineWidth != -1).
+function chooseScalarStyle (string, singleLineOnly, indentPerLevel, lineWidth,
+  testAmbiguousType, quotingType, forceQuotes, inblock) {
+  let i
+  let char = 0
+  let prevChar = null
+  let hasLineBreak = false
+  let hasFoldableLine = false // only checked if shouldTrackWidth
+  const shouldTrackWidth = lineWidth !== -1
+  let previousLineBreak = -1 // count the first line correctly
+  let plain = isPlainSafeFirst(codePointAt(string, 0)) &&
+    isPlainSafeLast(codePointAt(string, string.length - 1))
+
+  if (singleLineOnly || forceQuotes) {
+    // Case: no block styles.
+    // Check for disallowed characters to rule out plain and single.
+    for (i = 0; i < string.length; char >= 0x10000 ? i += 2 : i++) {
+      char = codePointAt(string, i)
+      if (!isPrintable(char)) {
+        return STYLE_DOUBLE
+      }
+      plain = plain && isPlainSafe(char, prevChar, inblock)
+      prevChar = char
+    }
+  } else {
+    // Case: block styles permitted.
+    for (i = 0; i < string.length; char >= 0x10000 ? i += 2 : i++) {
+      char = codePointAt(string, i)
+      if (char === CHAR_LINE_FEED) {
+        hasLineBreak = true
+        // Check if any line can be folded.
+        if (shouldTrackWidth) {
+          hasFoldableLine = hasFoldableLine ||
+            // Foldable line = too long, and not more-indented.
+            (i - previousLineBreak - 1 > lineWidth &&
+             string[previousLineBreak + 1] !== ' ')
+          previousLineBreak = i
+        }
+      } else if (!isPrintable(char)) {
+        return STYLE_DOUBLE
+      }
+      plain = plain && isPlainSafe(char, prevChar, inblock)
+      prevChar = char
+    }
+    // in case the end is missing a \n
+    hasFoldableLine = hasFoldableLine || (shouldTrackWidth &&
+      (i - previousLineBreak - 1 > lineWidth &&
+       string[previousLineBreak + 1] !== ' '))
+  }
+  // Although every style can represent \n without escaping, prefer block styles
+  // for multiline, since they're more readable and they don't add empty lines.
+  // Also prefer folding a super-long line.
+  if (!hasLineBreak && !hasFoldableLine) {
+    // Strings interpretable as another type have to be quoted;
+    // e.g. the string 'true' vs. the boolean true.
+    if (plain && !forceQuotes && !testAmbiguousType(string)) {
+      return STYLE_PLAIN
+    }
+    return quotingType === QUOTING_TYPE_DOUBLE ? STYLE_DOUBLE : STYLE_SINGLE
+  }
+  // Edge case: block indentation indicator can only have one digit.
+  if (indentPerLevel > 9 && needIndentIndicator(string)) {
+    return STYLE_DOUBLE
+  }
+  // At this point we know block styles are valid.
+  // Prefer literal style unless we want to fold.
+  if (!forceQuotes) {
+    return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL
+  }
+  return quotingType === QUOTING_TYPE_DOUBLE ? STYLE_DOUBLE : STYLE_SINGLE
+}
+
+// Note: line breaking/folding is implemented for only the folded style.
+// NB. We drop the last trailing newline (if any) of a returned block scalar
+//  since the dumper adds its own newline. This always works:
+//    • No ending newline => unaffected; already using strip "-" chomping.
+//    • Ending newline    => removed then restored.
+//  Importantly, this keeps the "+" chomp indicator from gaining an extra line.
+function writeScalar (state, string, level, iskey, inblock) {
+  state.dump = (function () {
+    if (string.length === 0) {
+      return state.quotingType === QUOTING_TYPE_DOUBLE ? '""' : "''"
+    }
+    if (!state.noCompatMode) {
+      if (DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1 || DEPRECATED_BASE60_SYNTAX.test(string)) {
+        return state.quotingType === QUOTING_TYPE_DOUBLE ? ('"' + string + '"') : ("'" + string + "'")
+      }
+    }
+
+    const indent = state.indent * Math.max(1, level) // no 0-indent scalars
+    // As indentation gets deeper, let the width decrease monotonically
+    // to the lower bound min(state.lineWidth, 40).
+    // Note that this implies
+    //  state.lineWidth ≤ 40 + state.indent: width is fixed at the lower bound.
+    //  state.lineWidth > 40 + state.indent: width decreases until the lower bound.
+    // This behaves better than a constant minimum width which disallows narrower options,
+    // or an indent threshold which causes the width to suddenly increase.
+    const lineWidth = (state.lineWidth === -1)
+      ? -1
+      : Math.max(Math.min(state.lineWidth, 40), state.lineWidth - indent)
+
+    // Without knowing if keys are implicit/explicit, assume implicit for safety.
+    const singleLineOnly = iskey ||
+      // No block styles in flow mode.
+      (state.flowLevel > -1 && level >= state.flowLevel)
+    function testAmbiguity (string) {
+      return testImplicitResolving(state, string)
+    }
+
+    switch (chooseScalarStyle(string, singleLineOnly, state.indent, lineWidth,
+      testAmbiguity, state.quotingType, state.forceQuotes && !iskey, inblock)) {
+      case STYLE_PLAIN:
+        return string
+      case STYLE_SINGLE:
+        return "'" + string.replace(/'/g, "''") + "'"
+      case STYLE_LITERAL:
+        return '|' + blockHeader(string, state.indent) +
+          dropEndingNewline(indentString(string, indent))
+      case STYLE_FOLDED:
+        return '>' + blockHeader(string, state.indent) +
+          dropEndingNewline(indentString(foldString(string, lineWidth), indent))
+      case STYLE_DOUBLE:
+        return '"' + escapeString(string, lineWidth) + '"'
+      default:
+        throw new YAMLException('impossible error: invalid scalar style')
+    }
+  }())
+}
+
+// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.
+function blockHeader (string, indentPerLevel) {
+  const indentIndicator = needIndentIndicator(string) ? String(indentPerLevel) : ''
+
+  // note the special case: the string '\n' counts as a "trailing" empty line.
+  const clip = string[string.length - 1] === '\n'
+  const keep = clip && (string[string.length - 2] === '\n' || string === '\n')
+  const chomp = keep ? '+' : (clip ? '' : '-')
+
+  return indentIndicator + chomp + '\n'
+}
+
+// (See the note for writeScalar.)
+function dropEndingNewline (string) {
+  return string[string.length - 1] === '\n' ? string.slice(0, -1) : string
+}
+
+// Note: a long line without a suitable break point will exceed the width limit.
+// Pre-conditions: every char in str isPrintable, str.length > 0, width > 0.
+function foldString (string, width) {
+  // In folded style, $k$ consecutive newlines output as $k+1$ newlines—
+  // unless they're before or after a more-indented line, or at the very
+  // beginning or end, in which case $k$ maps to $k$.
+  // Therefore, parse each chunk as newline(s) followed by a content line.
+  const lineRe = /(\n+)([^\n]*)/g
+
+  // first line (possibly an empty line)
+  let result = (function () {
+    let nextLF = string.indexOf('\n')
+    nextLF = nextLF !== -1 ? nextLF : string.length
+    lineRe.lastIndex = nextLF
+    return foldLine(string.slice(0, nextLF), width)
+  }())
+  // If we haven't reached the first content line yet, don't add an extra \n.
+  let prevMoreIndented = string[0] === '\n' || string[0] === ' '
+  let moreIndented
+
+  // rest of the lines
+  let match
+  while ((match = lineRe.exec(string))) {
+    const prefix = match[1]
+    const line = match[2]
+
+    moreIndented = (line[0] === ' ')
+    result += prefix +
+      ((!prevMoreIndented && !moreIndented && line !== '') ? '\n' : '') +
+      foldLine(line, width)
+    prevMoreIndented = moreIndented
+  }
+
+  return result
+}
+
+// Greedy line breaking.
+// Picks the longest line under the limit each time,
+// otherwise settles for the shortest line over the limit.
+// NB. More-indented lines *cannot* be folded, as that would add an extra \n.
+function foldLine (line, width) {
+  if (line === '' || line[0] === ' ') return line
+
+  // Since a more-indented line adds a \n, breaks can't be followed by a space.
+  const breakRe = / [^ ]/g // note: the match index will always be <= length-2.
+  let match
+  // start is an inclusive index. end, curr, and next are exclusive.
+  let start = 0
+  let end
+  let curr = 0
+  let next = 0
+  let result = ''
+
+  // Invariants: 0 <= start <= length-1.
+  //   0 <= curr <= next <= max(0, length-2). curr - start <= width.
+  // Inside the loop:
+  //   A match implies length >= 2, so curr and next are <= length-2.
+  while ((match = breakRe.exec(line))) {
+    next = match.index
+    // maintain invariant: curr - start <= width
+    if (next - start > width) {
+      end = (curr > start) ? curr : next // derive end <= length-2
+      result += '\n' + line.slice(start, end)
+      // skip the space that was output as \n
+      start = end + 1                    // derive start <= length-1
+    }
+    curr = next
+  }
+
+  // By the invariants, start <= length-1, so there is something left over.
+  // It is either the whole string or a part starting from non-whitespace.
+  result += '\n'
+  // Insert a break if the remainder is too long and there is a break available.
+  if (line.length - start > width && curr > start) {
+    result += line.slice(start, curr) + '\n' + line.slice(curr + 1)
+  } else {
+    result += line.slice(start)
+  }
+
+  return result.slice(1) // drop extra \n joiner
+}
+
+// Escapes a double-quoted string.
+function escapeString (string) {
+  let result = ''
+  let char = 0
+
+  for (let i = 0; i < string.length; char >= 0x10000 ? i += 2 : i++) {
+    char = codePointAt(string, i)
+    const escapeSeq = ESCAPE_SEQUENCES[char]
+
+    if (!escapeSeq && isPrintable(char)) {
+      result += string[i]
+      if (char >= 0x10000) result += string[i + 1]
+    } else {
+      result += escapeSeq || encodeHex(char)
+    }
+  }
+
+  return result
+}
+
+function writeFlowSequence (state, level, object) {
+  let _result = ''
+  const _tag = state.tag
+
+  for (let index = 0, length = object.length; index < length; index += 1) {
+    let value = object[index]
+
+    if (state.replacer) {
+      value = state.replacer.call(object, String(index), value)
+    }
+
+    // Write only valid elements, put null instead of invalid elements.
+    if (writeNode(state, level, value, false, false) ||
+        (typeof value === 'undefined' &&
+         writeNode(state, level, null, false, false))) {
+      if (_result !== '') _result += ',' + (!state.condenseFlow ? ' ' : '')
+      _result += state.dump
+    }
+  }
+
+  state.tag = _tag
+  state.dump = '[' + _result + ']'
+}
+
+function writeBlockSequence (state, level, object, compact) {
+  let _result = ''
+  const _tag = state.tag
+
+  for (let index = 0, length = object.length; index < length; index += 1) {
+    let value = object[index]
+
+    if (state.replacer) {
+      value = state.replacer.call(object, String(index), value)
+    }
+
+    // Write only valid elements, put null instead of invalid elements.
+    if (writeNode(state, level + 1, value, true, true, false, true) ||
+        (typeof value === 'undefined' &&
+         writeNode(state, level + 1, null, true, true, false, true))) {
+      if (!compact || _result !== '') {
+        _result += generateNextLine(state, level)
+      }
+
+      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
+        _result += '-'
+      } else {
+        _result += '- '
+      }
+
+      _result += state.dump
+    }
+  }
+
+  state.tag = _tag
+  state.dump = _result || '[]' // Empty sequence if no valid values.
+}
+
+function writeFlowMapping (state, level, object) {
+  let _result = ''
+  const _tag = state.tag
+  const objectKeyList = Object.keys(object)
+
+  for (let index = 0, length = objectKeyList.length; index < length; index += 1) {
+    let pairBuffer = ''
+    if (_result !== '') pairBuffer += ', '
+
+    if (state.condenseFlow) pairBuffer += '"'
+
+    const objectKey = objectKeyList[index]
+    let objectValue = object[objectKey]
+
+    if (state.replacer) {
+      objectValue = state.replacer.call(object, objectKey, objectValue)
+    }
+
+    if (!writeNode(state, level, objectKey, false, false)) {
+      continue // Skip this pair because of invalid key;
+    }
+
+    if (state.dump.length > 1024) pairBuffer += '? '
+
+    pairBuffer += state.dump + (state.condenseFlow ? '"' : '') + ':' + (state.condenseFlow ? '' : ' ')
+
+    if (!writeNode(state, level, objectValue, false, false)) {
+      continue // Skip this pair because of invalid value.
+    }
+
+    pairBuffer += state.dump
+
+    // Both key and value are valid.
+    _result += pairBuffer
+  }
+
+  state.tag = _tag
+  state.dump = '{' + _result + '}'
+}
+
+function writeBlockMapping (state, level, object, compact) {
+  let _result = ''
+  const _tag = state.tag
+  const objectKeyList = Object.keys(object)
+
+  // Allow sorting keys so that the output file is deterministic
+  if (state.sortKeys === true) {
+    // Default sorting
+    objectKeyList.sort()
+  } else if (typeof state.sortKeys === 'function') {
+    // Custom sort function
+    objectKeyList.sort(state.sortKeys)
+  } else if (state.sortKeys) {
+    // Something is wrong
+    throw new YAMLException('sortKeys must be a boolean or a function')
+  }
+
+  for (let index = 0, length = objectKeyList.length; index < length; index += 1) {
+    let pairBuffer = ''
+
+    if (!compact || _result !== '') {
+      pairBuffer += generateNextLine(state, level)
+    }
+
+    const objectKey = objectKeyList[index]
+    let objectValue = object[objectKey]
+
+    if (state.replacer) {
+      objectValue = state.replacer.call(object, objectKey, objectValue)
+    }
+
+    if (!writeNode(state, level + 1, objectKey, true, true, true)) {
+      continue // Skip this pair because of invalid key.
+    }
+
+    const explicitPair = (state.tag !== null && state.tag !== '?') ||
+                   (state.dump && state.dump.length > 1024)
+
+    if (explicitPair) {
+      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
+        pairBuffer += '?'
+      } else {
+        pairBuffer += '? '
+      }
+    }
+
+    pairBuffer += state.dump
+
+    if (explicitPair) {
+      pairBuffer += generateNextLine(state, level)
+    }
+
+    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {
+      continue // Skip this pair because of invalid value.
+    }
+
+    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
+      pairBuffer += ':'
+    } else {
+      pairBuffer += ': '
+    }
+
+    pairBuffer += state.dump
+
+    // Both key and value are valid.
+    _result += pairBuffer
+  }
+
+  state.tag = _tag
+  state.dump = _result || '{}' // Empty mapping if no valid pairs.
+}
+
+function detectType (state, object, explicit) {
+  const typeList = explicit ? state.explicitTypes : state.implicitTypes
+
+  for (let index = 0, length = typeList.length; index < length; index += 1) {
+    const type = typeList[index]
+
+    if ((type.instanceOf || type.predicate) &&
+        (!type.instanceOf || ((typeof object === 'object') && (object instanceof type.instanceOf))) &&
+        (!type.predicate || type.predicate(object))) {
+      if (explicit) {
+        if (type.multi && type.representName) {
+          state.tag = type.representName(object)
+        } else {
+          state.tag = type.tag
+        }
+      } else {
+        state.tag = '?'
+      }
+
+      if (type.represent) {
+        const style = state.styleMap[type.tag] || type.defaultStyle
+
+        let _result
+        if (_toString.call(type.represent) === '[object Function]') {
+          _result = type.represent(object, style)
+        } else if (_hasOwnProperty.call(type.represent, style)) {
+          _result = type.represent[style](object, style)
+        } else {
+          throw new YAMLException('!<' + type.tag + '> tag resolver accepts not "' + style + '" style')
+        }
+
+        state.dump = _result
+      }
+
+      return true
+    }
+  }
+
+  return false
+}
+
+// Serializes `object` and writes it to global `result`.
+// Returns true on success, or false on invalid object.
+//
+function writeNode (state, level, object, block, compact, iskey, isblockseq) {
+  state.tag = null
+  state.dump = object
+
+  if (!detectType(state, object, false)) {
+    detectType(state, object, true)
+  }
+
+  const type = _toString.call(state.dump)
+  const inblock = block
+
+  if (block) {
+    block = (state.flowLevel < 0 || state.flowLevel > level)
+  }
+
+  const objectOrArray = type === '[object Object]' || type === '[object Array]'
+  let duplicateIndex
+  let duplicate
+
+  if (objectOrArray) {
+    duplicateIndex = state.duplicates.indexOf(object)
+    duplicate = duplicateIndex !== -1
+  }
+
+  if ((state.tag !== null && state.tag !== '?') || duplicate || (state.indent !== 2 && level > 0)) {
+    compact = false
+  }
+
+  if (duplicate && state.usedDuplicates[duplicateIndex]) {
+    state.dump = '*ref_' + duplicateIndex
+  } else {
+    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {
+      state.usedDuplicates[duplicateIndex] = true
+    }
+    if (type === '[object Object]') {
+      if (block && (Object.keys(state.dump).length !== 0)) {
+        writeBlockMapping(state, level, state.dump, compact)
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + state.dump
+        }
+      } else {
+        writeFlowMapping(state, level, state.dump)
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump
+        }
+      }
+    } else if (type === '[object Array]') {
+      if (block && (state.dump.length !== 0)) {
+        if (state.noArrayIndent && !isblockseq && level > 0) {
+          writeBlockSequence(state, level - 1, state.dump, compact)
+        } else {
+          writeBlockSequence(state, level, state.dump, compact)
+        }
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + state.dump
+        }
+      } else {
+        writeFlowSequence(state, level, state.dump)
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump
+        }
+      }
+    } else if (type === '[object String]') {
+      if (state.tag !== '?') {
+        writeScalar(state, state.dump, level, iskey, inblock)
+      }
+    } else if (type === '[object Undefined]') {
+      return false
+    } else {
+      if (state.skipInvalid) return false
+      throw new YAMLException('unacceptable kind of an object to dump ' + type)
+    }
+
+    if (state.tag !== null && state.tag !== '?') {
+      // Need to encode all characters except those allowed by the spec:
+      //
+      // [35] ns-dec-digit    ::=  [#x30-#x39] /* 0-9 */
+      // [36] ns-hex-digit    ::=  ns-dec-digit
+      //                         | [#x41-#x46] /* A-F */ | [#x61-#x66] /* a-f */
+      // [37] ns-ascii-letter ::=  [#x41-#x5A] /* A-Z */ | [#x61-#x7A] /* a-z */
+      // [38] ns-word-char    ::=  ns-dec-digit | ns-ascii-letter | “-”
+      // [39] ns-uri-char     ::=  “%” ns-hex-digit ns-hex-digit | ns-word-char | “#”
+      //                         | “;” | “/” | “?” | “:” | “@” | “&” | “=” | “+” | “$” | “,”
+      //                         | “_” | “.” | “!” | “~” | “*” | “'” | “(” | “)” | “[” | “]”
+      //
+      // Also need to encode '!' because it has special meaning (end of tag prefix).
+      //
+      let tagStr = encodeURI(
+        state.tag[0] === '!' ? state.tag.slice(1) : state.tag
+      ).replace(/!/g, '%21')
+
+      if (state.tag[0] === '!') {
+        tagStr = '!' + tagStr
+      } else if (tagStr.slice(0, 18) === 'tag:yaml.org,2002:') {
+        tagStr = '!!' + tagStr.slice(18)
+      } else {
+        tagStr = '!<' + tagStr + '>'
+      }
+
+      state.dump = tagStr + ' ' + state.dump
+    }
+  }
+
+  return true
+}
+
+function getDuplicateReferences (object, state) {
+  const objects = []
+  const duplicatesIndexes = []
+
+  inspectNode(object, objects, duplicatesIndexes)
+
+  const length = duplicatesIndexes.length
+  for (let index = 0; index < length; index += 1) {
+    state.duplicates.push(objects[duplicatesIndexes[index]])
+  }
+  state.usedDuplicates = new Array(length)
+}
+
+function inspectNode (object, objects, duplicatesIndexes) {
+  if (object !== null && typeof object === 'object') {
+    const index = objects.indexOf(object)
+    if (index !== -1) {
+      if (duplicatesIndexes.indexOf(index) === -1) {
+        duplicatesIndexes.push(index)
+      }
+    } else {
+      objects.push(object)
+
+      if (Array.isArray(object)) {
+        for (let i = 0, length = object.length; i < length; i += 1) {
+          inspectNode(object[i], objects, duplicatesIndexes)
+        }
+      } else {
+        const objectKeyList = Object.keys(object)
+
+        for (let i = 0, length = objectKeyList.length; i < length; i += 1) {
+          inspectNode(object[objectKeyList[i]], objects, duplicatesIndexes)
+        }
+      }
+    }
+  }
+}
+
+function dump (input, options) {
+  options = options || {}
+
+  const state = new State(options)
+
+  if (!state.noRefs) getDuplicateReferences(input, state)
+
+  let value = input
+
+  if (state.replacer) {
+    value = state.replacer.call({ '': value }, '', value)
+  }
+
+  if (writeNode(state, 0, value, true, true)) return state.dump + '\n'
+
+  return ''
+}
+
+module.exports.dump = dump

smart-app-city/frontend/node_modules/js-yaml/lib/exception.js

@@ -0,0 +1,51 @@
+// YAML error class. http://stackoverflow.com/questions/8458984
+//
+'use strict'
+
+function formatError (exception, compact) {
+  let where = ''
+  const message = exception.reason || '(unknown reason)'
+
+  if (!exception.mark) return message
+
+  if (exception.mark.name) {
+    where += 'in "' + exception.mark.name + '" '
+  }
+
+  where += '(' + (exception.mark.line + 1) + ':' + (exception.mark.column + 1) + ')'
+
+  if (!compact && exception.mark.snippet) {
+    where += '\n\n' + exception.mark.snippet
+  }
+
+  return message + ' ' + where
+}
+
+function YAMLException (reason, mark) {
+  // Super constructor
+  Error.call(this)
+
+  this.name = 'YAMLException'
+  this.reason = reason
+  this.mark = mark
+  this.message = formatError(this, false)
+
+  // Include stack trace in error object
+  if (Error.captureStackTrace) {
+    // Chrome and NodeJS
+    Error.captureStackTrace(this, this.constructor)
+  } else {
+    // FF, IE 10+ and Safari 6+. Fallback for others
+    this.stack = (new Error()).stack || ''
+  }
+}
+
+// Inherit from Error
+YAMLException.prototype = Object.create(Error.prototype)
+YAMLException.prototype.constructor = YAMLException
+
+YAMLException.prototype.toString = function toString (compact) {
+  return this.name + ': ' + formatError(this, compact)
+}
+
+module.exports = YAMLException

smart-app-city/frontend/node_modules/js-yaml/lib/index_vite_proxy.tmp.mjs

@@ -0,0 +1,37 @@
+import yaml from '../index.js'
+
+const {
+  Type,
+  Schema,
+  FAILSAFE_SCHEMA,
+  JSON_SCHEMA,
+  CORE_SCHEMA,
+  DEFAULT_SCHEMA,
+  load,
+  loadAll,
+  dump,
+  YAMLException,
+  types,
+  safeLoad,
+  safeLoadAll,
+  safeDump
+} = yaml
+
+export {
+  Type,
+  Schema,
+  FAILSAFE_SCHEMA,
+  JSON_SCHEMA,
+  CORE_SCHEMA,
+  DEFAULT_SCHEMA,
+  load,
+  loadAll,
+  dump,
+  YAMLException,
+  types,
+  safeLoad,
+  safeLoadAll,
+  safeDump
+}
+
+export default yaml

smart-app-city/frontend/node_modules/js-yaml/lib/schema.js

@@ -0,0 +1,109 @@
+'use strict'
+
+const YAMLException = require('./exception')
+const Type = require('./type')
+
+function compileList (schema, name) {
+  const result = []
+
+  schema[name].forEach(function (currentType) {
+    let newIndex = result.length
+
+    result.forEach(function (previousType, previousIndex) {
+      if (previousType.tag === currentType.tag &&
+          previousType.kind === currentType.kind &&
+          previousType.multi === currentType.multi) {
+        newIndex = previousIndex
+      }
+    })
+
+    result[newIndex] = currentType
+  })
+
+  return result
+}
+
+function compileMap (/* lists... */) {
+  const result = {
+    scalar: {},
+    sequence: {},
+    mapping: {},
+    fallback: {},
+    multi: {
+      scalar: [],
+      sequence: [],
+      mapping: [],
+      fallback: []
+    }
+  }
+  function collectType (type) {
+    if (type.multi) {
+      result.multi[type.kind].push(type)
+      result.multi['fallback'].push(type)
+    } else {
+      result[type.kind][type.tag] = result['fallback'][type.tag] = type
+    }
+  }
+
+  for (let index = 0, length = arguments.length; index < length; index += 1) {
+    arguments[index].forEach(collectType)
+  }
+  return result
+}
+
+function Schema (definition) {
+  return this.extend(definition)
+}
+
+Schema.prototype.extend = function extend (definition) {
+  let implicit = []
+  let explicit = []
+
+  if (definition instanceof Type) {
+    // Schema.extend(type)
+    explicit.push(definition)
+  } else if (Array.isArray(definition)) {
+    // Schema.extend([ type1, type2, ... ])
+    explicit = explicit.concat(definition)
+  } else if (definition && (Array.isArray(definition.implicit) || Array.isArray(definition.explicit))) {
+    // Schema.extend({ explicit: [ type1, type2, ... ], implicit: [ type1, type2, ... ] })
+    if (definition.implicit) implicit = implicit.concat(definition.implicit)
+    if (definition.explicit) explicit = explicit.concat(definition.explicit)
+  } else {
+    throw new YAMLException('Schema.extend argument should be a Type, [ Type ], ' +
+      'or a schema definition ({ implicit: [...], explicit: [...] })')
+  }
+
+  implicit.forEach(function (type) {
+    if (!(type instanceof Type)) {
+      throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.')
+    }
+
+    if (type.loadKind && type.loadKind !== 'scalar') {
+      throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.')
+    }
+
+    if (type.multi) {
+      throw new YAMLException('There is a multi type in the implicit list of a schema. Multi tags can only be listed as explicit.')
+    }
+  })
+
+  explicit.forEach(function (type) {
+    if (!(type instanceof Type)) {
+      throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.')
+    }
+  })
+
+  const result = Object.create(Schema.prototype)
+
+  result.implicit = (this.implicit || []).concat(implicit)
+  result.explicit = (this.explicit || []).concat(explicit)
+
+  result.compiledImplicit = compileList(result, 'implicit')
+  result.compiledExplicit = compileList(result, 'explicit')
+  result.compiledTypeMap = compileMap(result.compiledImplicit, result.compiledExplicit)
+
+  return result
+}
+
+module.exports = Schema

smart-app-city/frontend/node_modules/js-yaml/lib/schema/core.js

@@ -0,0 +1,9 @@
+// Standard YAML's Core schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2804923
+//
+// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
+// So, Core schema has no distinctions from JSON schema is JS-YAML.
+
+'use strict'
+
+module.exports = require('./json')

smart-app-city/frontend/node_modules/js-yaml/lib/schema/default.js

@@ -0,0 +1,20 @@
+// JS-YAML's default schema for `safeLoad` function.
+// It is not described in the YAML specification.
+//
+// This schema is based on standard YAML's Core schema and includes most of
+// extra types described at YAML tag repository. (http://yaml.org/type/)
+
+'use strict'
+
+module.exports = require('./core').extend({
+  implicit: [
+    require('../type/timestamp'),
+    require('../type/merge')
+  ],
+  explicit: [
+    require('../type/binary'),
+    require('../type/omap'),
+    require('../type/pairs'),
+    require('../type/set')
+  ]
+})

smart-app-city/frontend/node_modules/js-yaml/lib/schema/failsafe.js

@@ -0,0 +1,14 @@
+// Standard YAML's Failsafe schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2802346
+
+'use strict'
+
+const Schema = require('../schema')
+
+module.exports = new Schema({
+  explicit: [
+    require('../type/str'),
+    require('../type/seq'),
+    require('../type/map')
+  ]
+})

smart-app-city/frontend/node_modules/js-yaml/lib/schema/json.js

@@ -0,0 +1,17 @@
+// Standard YAML's JSON schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2803231
+//
+// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
+// So, this schema is not such strict as defined in the YAML specification.
+// It allows numbers in binary notaion, use `Null` and `NULL` as `null`, etc.
+
+'use strict'
+
+module.exports = require('./failsafe').extend({
+  implicit: [
+    require('../type/null'),
+    require('../type/bool'),
+    require('../type/int'),
+    require('../type/float')
+  ]
+})

smart-app-city/frontend/node_modules/js-yaml/lib/snippet.js

@@ -0,0 +1,96 @@
+'use strict'
+
+const common = require('./common')
+
+// get snippet for a single line, respecting maxLength
+function getLine (buffer, lineStart, lineEnd, position, maxLineLength) {
+  let head = ''
+  let tail = ''
+  const maxHalfLength = Math.floor(maxLineLength / 2) - 1
+
+  if (position - lineStart > maxHalfLength) {
+    head = ' ... '
+    lineStart = position - maxHalfLength + head.length
+  }
+
+  if (lineEnd - position > maxHalfLength) {
+    tail = ' ...'
+    lineEnd = position + maxHalfLength - tail.length
+  }
+
+  return {
+    str: head + buffer.slice(lineStart, lineEnd).replace(/\t/g, '→') + tail,
+    pos: position - lineStart + head.length // relative position
+  }
+}
+
+function padStart (string, max) {
+  return common.repeat(' ', max - string.length) + string
+}
+
+function makeSnippet (mark, options) {
+  options = Object.create(options || null)
+
+  if (!mark.buffer) return null
+
+  if (!options.maxLength) options.maxLength = 79
+  if (typeof options.indent !== 'number') options.indent = 1
+  if (typeof options.linesBefore !== 'number') options.linesBefore = 3
+  if (typeof options.linesAfter !== 'number') options.linesAfter = 2
+
+  const re = /\r?\n|\r|\0/g
+  const lineStarts = [0]
+  const lineEnds = []
+  let match
+  let foundLineNo = -1
+
+  while ((match = re.exec(mark.buffer))) {
+    lineEnds.push(match.index)
+    lineStarts.push(match.index + match[0].length)
+
+    if (mark.position <= match.index && foundLineNo < 0) {
+      foundLineNo = lineStarts.length - 2
+    }
+  }
+
+  if (foundLineNo < 0) foundLineNo = lineStarts.length - 1
+
+  let result = ''
+  const lineNoLength = Math.min(mark.line + options.linesAfter, lineEnds.length).toString().length
+  const maxLineLength = options.maxLength - (options.indent + lineNoLength + 3)
+
+  for (let i = 1; i <= options.linesBefore; i++) {
+    if (foundLineNo - i < 0) break
+    const line = getLine(
+      mark.buffer,
+      lineStarts[foundLineNo - i],
+      lineEnds[foundLineNo - i],
+      mark.position - (lineStarts[foundLineNo] - lineStarts[foundLineNo - i]),
+      maxLineLength
+    )
+    result = common.repeat(' ', options.indent) + padStart((mark.line - i + 1).toString(), lineNoLength) +
+      ' | ' + line.str + '\n' + result
+  }
+
+  const line = getLine(mark.buffer, lineStarts[foundLineNo], lineEnds[foundLineNo], mark.position, maxLineLength)
+  result += common.repeat(' ', options.indent) + padStart((mark.line + 1).toString(), lineNoLength) +
+    ' | ' + line.str + '\n'
+  result += common.repeat('-', options.indent + lineNoLength + 3 + line.pos) + '^' + '\n'
+
+  for (let i = 1; i <= options.linesAfter; i++) {
+    if (foundLineNo + i >= lineEnds.length) break
+    const line = getLine(
+      mark.buffer,
+      lineStarts[foundLineNo + i],
+      lineEnds[foundLineNo + i],
+      mark.position - (lineStarts[foundLineNo] - lineStarts[foundLineNo + i]),
+      maxLineLength
+    )
+    result += common.repeat(' ', options.indent) + padStart((mark.line + i + 1).toString(), lineNoLength) +
+      ' | ' + line.str + '\n'
+  }
+
+  return result.replace(/\n$/, '')
+}
+
+module.exports = makeSnippet

smart-app-city/frontend/node_modules/js-yaml/lib/type.js

@@ -0,0 +1,66 @@
+'use strict'
+
+const YAMLException = require('./exception')
+
+const TYPE_CONSTRUCTOR_OPTIONS = [
+  'kind',
+  'multi',
+  'resolve',
+  'construct',
+  'instanceOf',
+  'predicate',
+  'represent',
+  'representName',
+  'defaultStyle',
+  'styleAliases'
+]
+
+const YAML_NODE_KINDS = [
+  'scalar',
+  'sequence',
+  'mapping'
+]
+
+function compileStyleAliases (map) {
+  const result = {}
+
+  if (map !== null) {
+    Object.keys(map).forEach(function (style) {
+      map[style].forEach(function (alias) {
+        result[String(alias)] = style
+      })
+    })
+  }
+
+  return result
+}
+
+function Type (tag, options) {
+  options = options || {}
+
+  Object.keys(options).forEach(function (name) {
+    if (TYPE_CONSTRUCTOR_OPTIONS.indexOf(name) === -1) {
+      throw new YAMLException('Unknown option "' + name + '" is met in definition of "' + tag + '" YAML type.')
+    }
+  })
+
+  // TODO: Add tag format check.
+  this.options = options // keep original options in case user wants to extend this type later
+  this.tag = tag
+  this.kind = options['kind'] || null
+  this.resolve = options['resolve'] || function () { return true }
+  this.construct = options['construct'] || function (data) { return data }
+  this.instanceOf = options['instanceOf'] || null
+  this.predicate = options['predicate'] || null
+  this.represent = options['represent'] || null
+  this.representName = options['representName'] || null
+  this.defaultStyle = options['defaultStyle'] || null
+  this.multi = options['multi'] || false
+  this.styleAliases = compileStyleAliases(options['styleAliases'] || null)
+
+  if (YAML_NODE_KINDS.indexOf(this.kind) === -1) {
+    throw new YAMLException('Unknown kind "' + this.kind + '" is specified for "' + tag + '" YAML type.')
+  }
+}
+
+module.exports = Type

smart-app-city/frontend/node_modules/js-yaml/lib/type/binary.js

@@ -0,0 +1,122 @@
+'use strict'
+
+const Type = require('../type')
+
+// [ 64, 65, 66 ] -> [ padding, CR, LF ]
+const BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r'
+
+function resolveYamlBinary (data) {
+  if (data === null) return false
+
+  let bitlen = 0
+  const max = data.length
+  const map = BASE64_MAP
+
+  // Convert one by one.
+  for (let idx = 0; idx < max; idx++) {
+    const code = map.indexOf(data.charAt(idx))
+
+    // Skip CR/LF
+    if (code > 64) continue
+
+    // Fail on illegal characters
+    if (code < 0) return false
+
+    bitlen += 6
+  }
+
+  // If there are any bits left, source was corrupted
+  return (bitlen % 8) === 0
+}
+
+function constructYamlBinary (data) {
+  const input = data.replace(/[\r\n=]/g, '') // remove CR/LF & padding to simplify scan
+  const max = input.length
+  const map = BASE64_MAP
+  let bits = 0
+  const result = []
+
+  // Collect by 6*4 bits (3 bytes)
+
+  for (let idx = 0; idx < max; idx++) {
+    if ((idx % 4 === 0) && idx) {
+      result.push((bits >> 16) & 0xFF)
+      result.push((bits >> 8) & 0xFF)
+      result.push(bits & 0xFF)
+    }
+
+    bits = (bits << 6) | map.indexOf(input.charAt(idx))
+  }
+
+  // Dump tail
+
+  const tailbits = (max % 4) * 6
+
+  if (tailbits === 0) {
+    result.push((bits >> 16) & 0xFF)
+    result.push((bits >> 8) & 0xFF)
+    result.push(bits & 0xFF)
+  } else if (tailbits === 18) {
+    result.push((bits >> 10) & 0xFF)
+    result.push((bits >> 2) & 0xFF)
+  } else if (tailbits === 12) {
+    result.push((bits >> 4) & 0xFF)
+  }
+
+  return new Uint8Array(result)
+}
+
+function representYamlBinary (object /*, style */) {
+  let result = ''
+  let bits = 0
+  const max = object.length
+  const map = BASE64_MAP
+
+  // Convert every three bytes to 4 ASCII characters.
+
+  for (let idx = 0; idx < max; idx++) {
+    if ((idx % 3 === 0) && idx) {
+      result += map[(bits >> 18) & 0x3F]
+      result += map[(bits >> 12) & 0x3F]
+      result += map[(bits >> 6) & 0x3F]
+      result += map[bits & 0x3F]
+    }
+
+    bits = (bits << 8) + object[idx]
+  }
+
+  // Dump tail
+
+  const tail = max % 3
+
+  if (tail === 0) {
+    result += map[(bits >> 18) & 0x3F]
+    result += map[(bits >> 12) & 0x3F]
+    result += map[(bits >> 6) & 0x3F]
+    result += map[bits & 0x3F]
+  } else if (tail === 2) {
+    result += map[(bits >> 10) & 0x3F]
+    result += map[(bits >> 4) & 0x3F]
+    result += map[(bits << 2) & 0x3F]
+    result += map[64]
+  } else if (tail === 1) {
+    result += map[(bits >> 2) & 0x3F]
+    result += map[(bits << 4) & 0x3F]
+    result += map[64]
+    result += map[64]
+  }
+
+  return result
+}
+
+function isBinary (obj) {
+  return Object.prototype.toString.call(obj) === '[object Uint8Array]'
+}
+
+module.exports = new Type('tag:yaml.org,2002:binary', {
+  kind: 'scalar',
+  resolve: resolveYamlBinary,
+  construct: constructYamlBinary,
+  predicate: isBinary,
+  represent: representYamlBinary
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/bool.js

@@ -0,0 +1,35 @@
+'use strict'
+
+const Type = require('../type')
+
+function resolveYamlBoolean (data) {
+  if (data === null) return false
+
+  const max = data.length
+
+  return (max === 4 && (data === 'true' || data === 'True' || data === 'TRUE')) ||
+         (max === 5 && (data === 'false' || data === 'False' || data === 'FALSE'))
+}
+
+function constructYamlBoolean (data) {
+  return data === 'true' ||
+         data === 'True' ||
+         data === 'TRUE'
+}
+
+function isBoolean (object) {
+  return Object.prototype.toString.call(object) === '[object Boolean]'
+}
+
+module.exports = new Type('tag:yaml.org,2002:bool', {
+  kind: 'scalar',
+  resolve: resolveYamlBoolean,
+  construct: constructYamlBoolean,
+  predicate: isBoolean,
+  represent: {
+    lowercase: function (object) { return object ? 'true' : 'false' },
+    uppercase: function (object) { return object ? 'TRUE' : 'FALSE' },
+    camelcase: function (object) { return object ? 'True' : 'False' }
+  },
+  defaultStyle: 'lowercase'
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/float.js

@@ -0,0 +1,99 @@
+'use strict'
+
+const common = require('../common')
+const Type = require('../type')
+
+const YAML_FLOAT_PATTERN = new RegExp(
+  // 2.5e4, 2.5 and integers
+  '^(?:[-+]?(?:[0-9]+)(?:\\.[0-9]*)?(?:[eE][-+]?[0-9]+)?' +
+  // .2e4, .2
+  // special case, seems not from spec
+  '|\\.[0-9]+(?:[eE][-+]?[0-9]+)?' +
+  // .inf
+  '|[-+]?\\.(?:inf|Inf|INF)' +
+  // .nan
+  '|\\.(?:nan|NaN|NAN))$')
+
+const YAML_FLOAT_SPECIAL_PATTERN = new RegExp(
+  '^(?:' +
+  // .inf
+  '[-+]?\\.(?:inf|Inf|INF)' +
+  // .nan
+  '|\\.(?:nan|NaN|NAN))$')
+
+function resolveYamlFloat (data) {
+  if (data === null) return false
+
+  if (!YAML_FLOAT_PATTERN.test(data)) {
+    return false
+  }
+
+  if (Number.isFinite(parseFloat(data, 10))) {
+    return true
+  }
+
+  return YAML_FLOAT_SPECIAL_PATTERN.test(data)
+}
+
+function constructYamlFloat (data) {
+  let value = data.toLowerCase()
+  const sign = value[0] === '-' ? -1 : 1
+
+  if ('+-'.indexOf(value[0]) >= 0) {
+    value = value.slice(1)
+  }
+
+  if (value === '.inf') {
+    return (sign === 1) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY
+  } else if (value === '.nan') {
+    return NaN
+  }
+  return sign * parseFloat(value, 10)
+}
+
+const SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/
+
+function representYamlFloat (object, style) {
+  if (isNaN(object)) {
+    switch (style) {
+      case 'lowercase': return '.nan'
+      case 'uppercase': return '.NAN'
+      case 'camelcase': return '.NaN'
+    }
+  } else if (Number.POSITIVE_INFINITY === object) {
+    switch (style) {
+      case 'lowercase': return '.inf'
+      case 'uppercase': return '.INF'
+      case 'camelcase': return '.Inf'
+    }
+  } else if (Number.NEGATIVE_INFINITY === object) {
+    switch (style) {
+      case 'lowercase': return '-.inf'
+      case 'uppercase': return '-.INF'
+      case 'camelcase': return '-.Inf'
+    }
+  } else if (common.isNegativeZero(object)) {
+    return '-0.0'
+  }
+
+  const res = object.toString(10)
+
+  // JS stringifier can build scientific format without dots: 5e-100,
+  // while YAML requres dot: 5.e-100. Fix it with simple hack
+
+  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res
+}
+
+function isFloat (object) {
+  return (Object.prototype.toString.call(object) === '[object Number]') &&
+         (object % 1 !== 0 || common.isNegativeZero(object))
+}
+
+module.exports = new Type('tag:yaml.org,2002:float', {
+  kind: 'scalar',
+  resolve: resolveYamlFloat,
+  construct: constructYamlFloat,
+  predicate: isFloat,
+  represent: representYamlFloat,
+  defaultStyle: 'lowercase'
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/int.js

@@ -0,0 +1,142 @@
+'use strict'
+
+const common = require('../common')
+const Type = require('../type')
+
+function isHexCode (c) {
+  return ((c >= 0x30/* 0 */) && (c <= 0x39/* 9 */)) ||
+         ((c >= 0x41/* A */) && (c <= 0x46/* F */)) ||
+         ((c >= 0x61/* a */) && (c <= 0x66/* f */))
+}
+
+function isOctCode (c) {
+  return ((c >= 0x30/* 0 */) && (c <= 0x37/* 7 */))
+}
+
+function isDecCode (c) {
+  return ((c >= 0x30/* 0 */) && (c <= 0x39/* 9 */))
+}
+
+function resolveYamlInteger (data) {
+  if (data === null) return false
+
+  const max = data.length
+  let index = 0
+  let hasDigits = false
+
+  if (!max) return false
+
+  let ch = data[index]
+
+  // sign
+  if (ch === '-' || ch === '+') {
+    ch = data[++index]
+  }
+
+  if (ch === '0') {
+    // 0
+    if (index + 1 === max) return true
+    ch = data[++index]
+
+    // base 2, base 8, base 16
+
+    if (ch === 'b') {
+      // base 2
+      index++
+
+      for (; index < max; index++) {
+        ch = data[index]
+        if (ch !== '0' && ch !== '1') return false
+        hasDigits = true
+      }
+      return hasDigits && Number.isFinite(parseYamlInteger(data))
+    }
+
+    if (ch === 'x') {
+      // base 16
+      index++
+
+      for (; index < max; index++) {
+        if (!isHexCode(data.charCodeAt(index))) return false
+        hasDigits = true
+      }
+      return hasDigits && Number.isFinite(parseYamlInteger(data))
+    }
+
+    if (ch === 'o') {
+      // base 8
+      index++
+
+      for (; index < max; index++) {
+        if (!isOctCode(data.charCodeAt(index))) return false
+        hasDigits = true
+      }
+      return hasDigits && Number.isFinite(parseYamlInteger(data))
+    }
+  }
+
+  // base 10 (except 0)
+
+  for (; index < max; index++) {
+    if (!isDecCode(data.charCodeAt(index))) {
+      return false
+    }
+    hasDigits = true
+  }
+
+  if (!hasDigits) return false
+
+  return Number.isFinite(parseYamlInteger(data))
+}
+
+function parseYamlInteger (data) {
+  let value = data
+  let sign = 1
+
+  let ch = value[0]
+
+  if (ch === '-' || ch === '+') {
+    if (ch === '-') sign = -1
+    value = value.slice(1)
+    ch = value[0]
+  }
+
+  if (value === '0') return 0
+
+  if (ch === '0') {
+    if (value[1] === 'b') return sign * parseInt(value.slice(2), 2)
+    if (value[1] === 'x') return sign * parseInt(value.slice(2), 16)
+    if (value[1] === 'o') return sign * parseInt(value.slice(2), 8)
+  }
+
+  return sign * parseInt(value, 10)
+}
+
+function constructYamlInteger (data) {
+  return parseYamlInteger(data)
+}
+
+function isInteger (object) {
+  return (Object.prototype.toString.call(object)) === '[object Number]' &&
+         (object % 1 === 0 && !common.isNegativeZero(object))
+}
+
+module.exports = new Type('tag:yaml.org,2002:int', {
+  kind: 'scalar',
+  resolve: resolveYamlInteger,
+  construct: constructYamlInteger,
+  predicate: isInteger,
+  represent: {
+    binary: function (obj) { return obj >= 0 ? '0b' + obj.toString(2) : '-0b' + obj.toString(2).slice(1) },
+    octal: function (obj) { return obj >= 0 ? '0o' + obj.toString(8) : '-0o' + obj.toString(8).slice(1) },
+    decimal: function (obj) { return obj.toString(10) },
+    hexadecimal: function (obj) { return obj >= 0 ? '0x' + obj.toString(16).toUpperCase() : '-0x' + obj.toString(16).toUpperCase().slice(1) }
+  },
+  defaultStyle: 'decimal',
+  styleAliases: {
+    binary: [2, 'bin'],
+    octal: [8, 'oct'],
+    decimal: [10, 'dec'],
+    hexadecimal: [16, 'hex']
+  }
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/map.js

@@ -0,0 +1,8 @@
+'use strict'
+
+const Type = require('../type')
+
+module.exports = new Type('tag:yaml.org,2002:map', {
+  kind: 'mapping',
+  construct: function (data) { return data !== null ? data : {} }
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/merge.js

@@ -0,0 +1,12 @@
+'use strict'
+
+const Type = require('../type')
+
+function resolveYamlMerge (data) {
+  return data === '<<' || data === null
+}
+
+module.exports = new Type('tag:yaml.org,2002:merge', {
+  kind: 'scalar',
+  resolve: resolveYamlMerge
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/null.js

@@ -0,0 +1,35 @@
+'use strict'
+
+const Type = require('../type')
+
+function resolveYamlNull (data) {
+  if (data === null) return true
+
+  const max = data.length
+
+  return (max === 1 && data === '~') ||
+         (max === 4 && (data === 'null' || data === 'Null' || data === 'NULL'))
+}
+
+function constructYamlNull () {
+  return null
+}
+
+function isNull (object) {
+  return object === null
+}
+
+module.exports = new Type('tag:yaml.org,2002:null', {
+  kind: 'scalar',
+  resolve: resolveYamlNull,
+  construct: constructYamlNull,
+  predicate: isNull,
+  represent: {
+    canonical: function () { return '~' },
+    lowercase: function () { return 'null' },
+    uppercase: function () { return 'NULL' },
+    camelcase: function () { return 'Null' },
+    empty: function () { return '' }
+  },
+  defaultStyle: 'lowercase'
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/omap.js

@@ -0,0 +1,45 @@
+'use strict'
+
+const Type = require('../type')
+
+const _hasOwnProperty = Object.prototype.hasOwnProperty
+const _toString = Object.prototype.toString
+
+function resolveYamlOmap (data) {
+  if (data === null) return true
+
+  const objectKeys = []
+  const object = data
+
+  for (let index = 0, length = object.length; index < length; index += 1) {
+    const pair = object[index]
+    let pairHasKey = false
+
+    if (_toString.call(pair) !== '[object Object]') return false
+
+    let pairKey
+    for (pairKey in pair) {
+      if (_hasOwnProperty.call(pair, pairKey)) {
+        if (!pairHasKey) pairHasKey = true
+        else return false
+      }
+    }
+
+    if (!pairHasKey) return false
+
+    if (objectKeys.indexOf(pairKey) === -1) objectKeys.push(pairKey)
+    else return false
+  }
+
+  return true
+}
+
+function constructYamlOmap (data) {
+  return data !== null ? data : []
+}
+
+module.exports = new Type('tag:yaml.org,2002:omap', {
+  kind: 'sequence',
+  resolve: resolveYamlOmap,
+  construct: constructYamlOmap
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/pairs.js

@@ -0,0 +1,50 @@
+'use strict'
+
+const Type = require('../type')
+
+const _toString = Object.prototype.toString
+
+function resolveYamlPairs (data) {
+  if (data === null) return true
+
+  const object = data
+
+  const result = new Array(object.length)
+
+  for (let index = 0, length = object.length; index < length; index += 1) {
+    const pair = object[index]
+
+    if (_toString.call(pair) !== '[object Object]') return false
+
+    const keys = Object.keys(pair)
+
+    if (keys.length !== 1) return false
+
+    result[index] = [keys[0], pair[keys[0]]]
+  }
+
+  return true
+}
+
+function constructYamlPairs (data) {
+  if (data === null) return []
+
+  const object = data
+  const result = new Array(object.length)
+
+  for (let index = 0, length = object.length; index < length; index += 1) {
+    const pair = object[index]
+
+    const keys = Object.keys(pair)
+
+    result[index] = [keys[0], pair[keys[0]]]
+  }
+
+  return result
+}
+
+module.exports = new Type('tag:yaml.org,2002:pairs', {
+  kind: 'sequence',
+  resolve: resolveYamlPairs,
+  construct: constructYamlPairs
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/seq.js

@@ -0,0 +1,8 @@
+'use strict'
+
+const Type = require('../type')
+
+module.exports = new Type('tag:yaml.org,2002:seq', {
+  kind: 'sequence',
+  construct: function (data) { return data !== null ? data : [] }
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/set.js

@@ -0,0 +1,29 @@
+'use strict'
+
+const Type = require('../type')
+
+const _hasOwnProperty = Object.prototype.hasOwnProperty
+
+function resolveYamlSet (data) {
+  if (data === null) return true
+
+  const object = data
+
+  for (const key in object) {
+    if (_hasOwnProperty.call(object, key)) {
+      if (object[key] !== null) return false
+    }
+  }
+
+  return true
+}
+
+function constructYamlSet (data) {
+  return data !== null ? data : {}
+}
+
+module.exports = new Type('tag:yaml.org,2002:set', {
+  kind: 'mapping',
+  resolve: resolveYamlSet,
+  construct: constructYamlSet
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/str.js

@@ -0,0 +1,8 @@
+'use strict'
+
+const Type = require('../type')
+
+module.exports = new Type('tag:yaml.org,2002:str', {
+  kind: 'scalar',
+  construct: function (data) { return data !== null ? data : '' }
+})

smart-app-city/frontend/node_modules/js-yaml/lib/type/timestamp.js

@@ -0,0 +1,88 @@
+'use strict'
+
+const Type = require('../type')
+
+const YAML_DATE_REGEXP = new RegExp(
+  '^([0-9][0-9][0-9][0-9])' + // [1] year
+  '-([0-9][0-9])' + // [2] month
+  '-([0-9][0-9])$')                   // [3] day
+
+const YAML_TIMESTAMP_REGEXP = new RegExp(
+  '^([0-9][0-9][0-9][0-9])' + // [1] year
+  '-([0-9][0-9]?)' + // [2] month
+  '-([0-9][0-9]?)' + // [3] day
+  '(?:[Tt]|[ \\t]+)' + // ...
+  '([0-9][0-9]?)' + // [4] hour
+  ':([0-9][0-9])' + // [5] minute
+  ':([0-9][0-9])' + // [6] second
+  '(?:\\.([0-9]*))?' + // [7] fraction
+  '(?:[ \\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tzHour
+  '(?::([0-9][0-9]))?))?$')           // [11] tzMinute
+
+function resolveYamlTimestamp (data) {
+  if (data === null) return false
+  if (YAML_DATE_REGEXP.exec(data) !== null) return true
+  if (YAML_TIMESTAMP_REGEXP.exec(data) !== null) return true
+  return false
+}
+
+function constructYamlTimestamp (data) {
+  let fraction = 0
+  let delta = null
+
+  let match = YAML_DATE_REGEXP.exec(data)
+  if (match === null) match = YAML_TIMESTAMP_REGEXP.exec(data)
+
+  if (match === null) throw new Error('Date resolve error')
+
+  // match: [1] year [2] month [3] day
+
+  const year = +(match[1])
+  const month = +(match[2]) - 1 // JS month starts with 0
+  const day = +(match[3])
+
+  if (!match[4]) { // no hour
+    return new Date(Date.UTC(year, month, day))
+  }
+
+  // match: [4] hour [5] minute [6] second [7] fraction
+
+  const hour = +(match[4])
+  const minute = +(match[5])
+  const second = +(match[6])
+
+  if (match[7]) {
+    fraction = match[7].slice(0, 3)
+    while (fraction.length < 3) { // milli-seconds
+      fraction += '0'
+    }
+    fraction = +fraction
+  }
+
+  // match: [8] tz [9] tz_sign [10] tzHour [11] tzMinute
+
+  if (match[9]) {
+    const tzHour = +(match[10])
+    const tzMinute = +(match[11] || 0)
+    delta = (tzHour * 60 + tzMinute) * 60000 // delta in mili-seconds
+    if (match[9] === '-') delta = -delta
+  }
+
+  const date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction))
+
+  if (delta) date.setTime(date.getTime() - delta)
+
+  return date
+}
+
+function representYamlTimestamp (object /*, style */) {
+  return object.toISOString()
+}
+
+module.exports = new Type('tag:yaml.org,2002:timestamp', {
+  kind: 'scalar',
+  resolve: resolveYamlTimestamp,
+  construct: constructYamlTimestamp,
+  instanceOf: Date,
+  represent: representYamlTimestamp
+})

smart-app-city/frontend/node_modules/js-yaml/package.json

@@ -0,0 +1,77 @@
+{
+  "name": "js-yaml",
+  "version": "4.2.0",
+  "description": "YAML 1.2 parser and serializer",
+  "keywords": [
+    "yaml",
+    "parser",
+    "serializer",
+    "pyyaml"
+  ],
+  "author": "Vladimir Zapparov <dervus.grim@gmail.com>",
+  "contributors": [
+    "Aleksey V Zapparov <ixti@member.fsf.org> (http://www.ixti.net/)",
+    "Vitaly Puzrin <vitaly@rcdesign.ru> (https://github.com/puzrin)",
+    "Martin Grenfell <martin.grenfell@gmail.com> (http://got-ravings.blogspot.com)"
+  ],
+  "license": "MIT",
+  "repository": "nodeca/js-yaml",
+  "funding": [
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/puzrin"
+    },
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/nodeca"
+    }
+  ],
+  "files": [
+    "index.js",
+    "lib/",
+    "bin/",
+    "dist/"
+  ],
+  "bin": {
+    "js-yaml": "bin/js-yaml.js"
+  },
+  "module": "./dist/js-yaml.mjs",
+  "exports": {
+    ".": {
+      "import": "./dist/js-yaml.mjs",
+      "require": "./index.js"
+    },
+    "./package.json": "./package.json"
+  },
+  "scripts": {
+    "lint": "eslint .",
+    "lint-fix": "eslint . --fix",
+    "test": "npm run lint && npm run test:core && npm run test:build",
+    "test:core": "node --test test/core/*.test.*",
+    "test:build": "npm run build && node --test test/build/*.test.*",
+    "coverage": "npm run build && c8 --include 'lib/**' -r text -r html -r lcov node --test test/core/*.test.*",
+    "build": "node support/build-dist.mjs",
+    "build:demo": "npm run lint && node support/build_demo.mjs",
+    "gh-demo": "npm run build:demo && gh-pages -d demo -f",
+    "prepack": "npm test && npm run build && npm run build:demo",
+    "postpublish": "npm run gh-demo"
+  },
+  "unpkg": "dist/js-yaml.min.js",
+  "jsdelivr": "dist/js-yaml.min.js",
+  "dependencies": {
+    "argparse": "^2.0.1"
+  },
+  "devDependencies": {
+    "c8": "^11.0.0",
+    "codemirror": "^5.65.21",
+    "eslint": "^9.39.4",
+    "fast-check": "^4.8.0",
+    "gh-pages": "^6.3.0",
+    "neostandard": "^0.13.0",
+    "tinybench": "^6.0.2",
+    "vite": "^8.0.14",
+    "vite-plugin-node-polyfills": "^0.28.0",
+    "vite-plugin-singlefile": "^2.3.3",
+    "workerpool": "^10.0.2"
+  }
+}