text: // eslint-disable-next-line node/no-unpublished-import
  import { mergeDeep } from './components/jgraduate/Util.js';
  
  /**
  * Escapes special characters in a regular expression.
  * @function regexEscape
  * @param {string} str
  * @returns {string}
  */
  export const regexEscape = function (str) {
    // Originally from: http://phpjs.org/functions
    return String(str).replace(/[.\\+*?[^\]$(){}=!<>|:-]/g, '\\$&');
  };
  /**
   * @class configObj
   */
  export default class ConfigObj {
    /**
     * @param {PlainObject} editor
     */
    constructor (editor) {
      /**
        * Preferences.
        * @interface module:SVGEditor.Prefs
        * @property {string} [lang="en"] Two-letter language code. The language must exist in the Editor Preferences language list. Defaults to "en" if `locale.js` detection does not detect another language.
        * @property {string} [bkgd_color="#FFF"] Color hex for canvas background color. Defaults to white.
        * @property {string} [bkgd_url=""] Background raster image URL. This image will fill the background of the document; useful for tracing purposes.
        * @property {"embed"|"ref"} [img_save="embed"] Defines whether included raster images should be saved as Data URIs when possible, or as URL references. Settable in the Document Properties dialog.
        * @property {boolean} [save_notice_done=false] Used to track alert status
        * @property {boolean} [export_notice_done=false] Used to track alert status
        * @todo `save_notice_done` and `export_notice_done` should be changed to flags rather than preferences
      */
      this.defaultPrefs = {
        // EDITOR OPTIONS (DIALOG)
        /**
          * Default to "en" if locale.js detection does not detect another language.
          */
        lang: 'en',
        /**
          * Will default to 's' if the window height is smaller than the minimum
          * height and 'm' otherwise.
          */
        bkgd_color: '#FFF',
        bkgd_url: '',
        // DOCUMENT PROPERTIES (DIALOG)
        img_save: 'embed',
        // ALERT NOTICES
        // Only shows in UI as far as alert notices, but useful to remember, so keeping as pref
        save_notice_done: false,
        export_notice_done: false
      };
      /**
        * @tutorial ConfigOptions
        * @interface module:SVGEditor.Config
        * @property {string} [canvasName="default"] Used to namespace storage provided via `ext-storage.js`; you can use this if you wish to have multiple independent instances of SVG Edit on the same domain
        * @property {boolean} [no_save_warning=false] If `true`, prevents the warning dialog box from appearing when closing/reloading the page. Mostly useful for testing.
        * @property {string} [imgPath="images/"] The path where the SVG icons are located, with trailing slash. Note that as of version 2.7, this is not configurable by URL for security reasons.
        * @property {boolean} [preventAllURLConfig=false] Set to `true` to override the ability for URLs to set non-content configuration (including extension config).
        *   Must be set early, i.e., in `svgedit-config-iife.js`; extension loading is too late!
        * @property {boolean} [preventURLContentLoading=false] Set to `true` to override the ability for URLs to set URL-based SVG content.
        *   Must be set early, i.e., in `svgedit-config-iife.js`; extension loading is too late!
        * @property {boolean} [lockExtensions=false] Set to `true` to override the ability for URLs to set their own extensions; disallowed in URL setting. There is no need for this when `preventAllURLConfig` is used.
        *   Must be set early, i.e., in `svgedit-config-iife.js`; extension loading is too late!
        * @property {boolean} [noDefaultExtensions=false] If set to `true`, prohibits automatic inclusion of default extensions (though "extensions" can still be used to add back any desired default extensions along with any other extensions).
        *   This can only be meaningfully used in `svgedit-config-iife.js` or in the URL
        * @property {boolean} [noStorageOnLoad=false] Some interaction with `ext-storage.js`; prevent even the loading of previously saved local storage.
        * @property {boolean} [forceStorage=false] Some interaction with `ext-storage.js`; strongly discouraged from modification as it bypasses user privacy by preventing them
        *   from choosing whether to keep local storage or not (and may be required by law in some regions)
        * @property {boolean} [emptyStorageOnDecline=false] Used by `ext-storage.js`; empty any prior storage if the user declines to store
        * @property {boolean} [avoidClientSide=false] DEPRECATED (use `avoidClientSideDownload` instead); Used by `ext-server_opensave.js`; set to `true` if you wish to always save to server and not only as fallback when client support is lacking
        * @property {boolean} [avoidClientSideDownload=false] Used by `ext-server_opensave.js`; set to `true` if you wish to always save to server and not only as fallback when client support is lacking
        * @property {boolean} [avoidClientSideOpen=false] Used by `ext-server_opensave.js`; set to `true` if you wish to always open from the server and not only as fallback when FileReader client support is lacking
        * @property {string[]} [extensions=[]] Extensions to load on startup. Use an array in `setConfig` and comma separated file names in the URL.Extension names must begin with "ext-".
        *   Note that as of version 2.7, paths containing "/", "\", or ":", are disallowed for security reasons.
        *   Although previous versions of this list would entirely override the default list, as of version 2.7, the defaults will always be added to this explicit list unless the configuration `noDefaultExtensions` is included.
        *   See {@link module:SVGEditor~defaultExtensions}.
        * @property {string[]} [allowedOrigins=[]] Used by `ext-xdomain-messaging.js` to indicate which origins are permitted for cross-domain messaging (e.g., between the embedded editor and main editor code).
        *   Besides explicit domains, one might add '*' to allow all domains (not recommended for privacy/data integrity of your user's content!),
        *   `window.location.origin` for allowing the same origin (should be safe if you trust all apps on your domain), 'null' to allow `file:///` URL usage
        * @property {string} [paramurl] This was available via URL only. Allowed an un-encoded URL within the query string (use "url" or "source" with a data: URI instead)
        * @property {Float} [canvas_expansion=3] The minimum area visible outside the canvas, as a multiple of the image dimensions. The larger the number, the more one can scroll outside the canvas.
        * @property {PlainObject} [initFill] Init fill properties
        * @property {string} [initFill.color="FF0000"] The initial fill color. Must be a hex code string. Defaults to solid red.
        * @property {Float} [initFill.opacity=1] The initial fill opacity. Must be a number between 0 and 1
        * @property {PlainObject} [initStroke] Init stroke properties
        * @property {Float} [initStroke.width=5] The initial stroke width. Must be a positive number.
        * @property {string} [initStroke.color="000000"] The initial stroke color. Must be a hex code. Defaults to solid black.
        * @property {Float} [initStroke.opacity=1] The initial stroke opacity. Must be a number between 0 and 1.
        * @property {PlainObject} text Text style properties
        * @property {Float} [text.stroke_width=0] Text stroke width
        * @property {Float} [text.font_size=24] Text font size
        * @property {string} [text.font_family="serif"] Text font family
        * @property {Float} [initOpacity=1] Initial opacity (multiplied by 100)
        * @property {module:SVGEditor.XYDimensions} [dimensions=[640, 480]] The default width/height of a new document. Use an array in `setConfig` (e.g., `[800, 600]`) and comma separated numbers in the URL.
        * @property {boolean} [gridSnapping=false] Enable snap to grid by default. Set in Editor Options.
        * @property {string} [gridColor="#000"] Accepts hex, e.g., '#000'. Set in Editor Options. Defaults to black.
        * @property {string} [baseUnit="px"] Set in Editor Options.
        * @property {Float} [snappingStep=10] Set the default grid snapping value. Set in Editor Options.
        * @property {boolean} [showRulers=true] Initial state of ruler display (v2.6). Set in Editor Options.
        * @property {string} [initTool="select"] The initially selected tool. Must be either the ID of the button for the tool, or the ID without `tool_` prefix (e.g., "select").
        * @property {boolean} [wireframe=false] Start in wireframe mode
        * @property {boolean} [showlayers=false] Open the layers side-panel by default.
        * @property {"new"|"same"} [exportWindowType="new"] Can be "new" or "same" to indicate whether new windows will be generated for each export;
        *   the `window.name` of the export window is namespaced based on the `canvasName` (and incremented if "new" is selected as the type). Introduced 2.8.
        * @property {boolean} [showGrid=false] Set by `ext-grid.js`; determines whether or not to show the grid by default
        * @property {boolean} [show_outside_canvas=true] Defines whether or not elements outside the canvas should be visible. Set and used in `svgcanvas.js`.
        * @property {boolean} [selectNew=true] If true, will replace the selection with the current element and automatically select element objects (when not in "path" mode) after they are created, showing their grips (v2.6).
        *   Set and used in `svgcanvas.js` (`mouseUp`).
       */
      this.defaultConfig = {
        canvasName: 'default',
        canvas_expansion: 3,
        initFill: {
          color: 'FF0000', // solid red
          opacity: 1
        },
        initStroke: {
          width: 5,
          color: '000000', // solid black
          opacity: 1
        },
        text: {
          stroke_width: 0,
          font_size: 24,
          font_family: 'Serif'
        },
        initOpacity: 1,
        initTool: 'select',
        exportWindowType: 'new', // 'same' (todo: also support 'download')
        wireframe: false,
        showlayers: false,
        no_save_warning: false,
        // PATH CONFIGURATION
        // The following path configuration items are disallowed in the URL (as should any future path configurations)
        imgPath: './images',
        // DOCUMENT PROPERTIES
        // Change the following to a preference (already in the Document Properties dialog)?
        dimensions: [ 640, 480 ],
        // EDITOR OPTIONS
        // Change the following to preferences (already in the Editor Options dialog)?
        gridSnapping: false,
        gridColor: '#000',
        baseUnit: 'px',
        snappingStep: 10,
        showRulers: true,
        // URL BEHAVIOR CONFIGURATION
        preventAllURLConfig: false,
        preventURLContentLoading: false,
        // EXTENSION CONFIGURATION (see also preventAllURLConfig)
        lockExtensions: false, // Disallowed in URL setting
        noDefaultExtensions: false, // noDefaultExtensions can only be meaningfully used in `svgedit-config-iife.js` or in the URL
        // EXTENSION-RELATED (GRID)
        showGrid: false, // Set by ext-grid.js
        // EXTENSION-RELATED (STORAGE)
        noStorageOnLoad: false, // Some interaction with ext-storage.js; prevent even the loading of previously saved local storage
        forceStorage: false, // Some interaction with ext-storage.js; strongly discouraged from modification as it bypasses user privacy by preventing them from choosing whether to keep local storage or not
        emptyStorageOnDecline: false, // Used by ext-storage.js; empty any prior storage if the user declines to store
        // EXTENSION (CLIENT VS. SERVER SAVING/OPENING)
        avoidClientSide: false, // Deprecated in favor of `avoidClientSideDownload`
        avoidClientSideDownload: false,
        avoidClientSideOpen: false
      };
  
      this.curPrefs = {};
      // Note: The difference between Prefs and Config is that Prefs
      //   can be changed in the UI and are stored in the browser,
      //   while config cannot
      this.urldata = {};
      /**
        * @name module:SVGEditor~defaultExtensions
        * @type {string[]}
      */
      this.defaultExtensions = [
        // 'ext-connector',
        'ext-eyedropper',
        'ext-grid',
        'ext-imagelib',
        // 'ext-arrows',
        'ext-markers',
        // 'ext-overview_window', disabled until we fix performance issue
        'ext-panning',
        'ext-shapes',
        'ext-polystar',
        'ext-storage',
        'ext-opensave'
      ];
      this.curConfig = {
        // We do not put on defaultConfig to simplify object copying
        //   procedures (we obtain instead from defaultExtensions)
        extensions: [],
        userExtensions: [],
        /**
        * Can use `location.origin` to indicate the current
        * origin. Can contain a '*' to allow all domains or 'null' (as
        * a string) to support all `file:///` URLs. Cannot be set by
        * URL for security reasons (not safe, at least for
        * privacy or data integrity of SVG content).
        * Might have been fairly safe to allow
        *   `new URL(location.href).origin` by default but
        *   avoiding it ensures some more security that even third
        *   party apps on the same domain also cannot communicate
        *   with this app by default.
        * For use with `ext-xdomain-messaging.js`
        * @todo We might instead make as a user-facing preference.
        */
        allowedOrigins: []
      };
      this.editor = editor;
    }
    /**
     * @function setupCurPrefs
     * @returns {void}
     */
    setupCurPrefs () {
      const curPrefs = { ...this.defaultPrefs, ...this.curPrefs }; // Now safe to merge with priority for curPrefs in the event any are already set
      // Export updated prefs
      this.curPrefs = curPrefs;
    }
    /**
     * Sets up current config based on defaults.
     * @returns {void}
     */
    setupCurConfig () {
      const curConfig = { ...this.defaultConfig, ...this.curConfig }; // Now safe to merge with priority for curConfig in the event any are already set
  
      // Now deal with extensions and other array config
      if (!curConfig.noDefaultExtensions) {
        curConfig.extensions = [ ...this.defaultExtensions ];
      }
      // Export updated config
      this.curConfig = curConfig;
    }
    /**
     * @function loadFromURL Load config/data from URL if given
     * @returns {void}
     */
    loadFromURL () {
      const self = this;
      const { search, searchParams } = new URL(location);
      if (search) {
        this.urldata = {};
        const entries = searchParams.entries();
        for(const entry of entries) {
          this.urldata[entry[0]] = entry[1];
        }
  
        [ 'initStroke', 'initFill' ].forEach((prop) => {
          if (searchParams.has(`${prop}[color]`)) {
            // Restore back to original non-deparamed value to avoid color
            //  strings being converted to numbers
            if(this.urldata[prop] === undefined) { this.urldata[prop] = {}; }
            this.urldata[prop].color = searchParams.get(`${prop}[color]`);
          }
        });
  
        if (searchParams.has('bkgd_color')) {
          this.urldata.bkgd_color = '#' + searchParams.get('bkgd_color');
        }
  
        if (this.urldata.dimensions) {
          this.urldata.dimensions = this.urldata.dimensions.split(',');
        }
  
        if (this.urldata.extensions) {
          // For security reasons, disallow cross-domain or cross-folder
          //  extensions via URL
          this.urldata.extensions = (/[:/\\]/).test(this.urldata.extensions)
            ? ''
            : this.urldata.extensions.split(',');
        }
  
        // Disallowing extension paths via URL for
        // security reasons, even for same-domain
        // ones given potential to interact in undesirable
        // ways with other script resources
        [ 'userExtensions', 'imgPath' ]
          .forEach(function (pathConfig) {
            if (self.urldata[pathConfig]) {
              delete self.urldata[pathConfig];
            }
          });
  
        // Note: `source` and `url` (as with `storagePrompt` later) are not
        //  set on config but are used below
        this.setConfig(this.urldata, { overwrite: false });
        this.setupCurConfig();
  
        if (!this.curConfig.preventURLContentLoading) {
          let { source } = this.urldata;
          if (!source) { // urldata.source may have been null if it ended with '='
            const src = searchParams.get('source');
            if (src && src.startsWith('data:')) {
              source = src;
            }
          }
          if (source) {
            if (source.startsWith('data:')) {
              this.editor.loadFromDataURI(source);
            } else {
              this.editor.loadFromString(source);
            }
            return;
          }
          if (this.urldata.url) {
            this.editor.loadFromURL(this.urldata.url);
            return;
          }
        }
        if (!this.urldata.noStorageOnLoad || this.curConfig.forceStorage) {
          this.loadContentAndPrefs();
        }
      } else {
        this.setupCurConfig();
        this.loadContentAndPrefs();
      }
    }
    /**
      * Where permitted, sets canvas and/or `configObj.defaultPrefs` based on previous
      *  storage. This will override URL settings (for security reasons) but
      *  not `svgedit-config-iife.js` configuration (unless initial user
      *  overriding is explicitly permitted there via `allowInitialUserOverride`).
      * @function module:SVGEditor.loadContentAndPrefs
      * @todo Split `allowInitialUserOverride` into `allowOverrideByURL` and
      *  `allowOverrideByUserStorage` so `svgedit-config-iife.js` can disallow some
      *  individual items for URL setting but allow for user storage AND/OR
      *  change URL setting so that it always uses a different namespace,
      *  so it won't affect pre-existing user storage (but then if users saves
      *  that, it will then be subject to tampering
      * @returns {void}
    */
    loadContentAndPrefs () {
      if (!this.curConfig.forceStorage &&
        (this.curConfig.noStorageOnLoad ||
            !(/(?:^|;\s*)svgeditstore=(?:prefsAndContent|prefsOnly)/).test(document.cookie)
        )
      ) {
        return;
      }
  
      // LOAD CONTENT
      if (this.editor.storage && // Cookies do not have enough available memory to hold large documents
        (this.curConfig.forceStorage ||
          (!this.curConfig.noStorageOnLoad &&
            (/(?:^|;\s*)svgeditstore=prefsAndContent/).test(document.cookie))
        )
      ) {
        const name = 'svgedit-' + this.curConfig.canvasName;
        const cached = this.editor.storage.getItem(name);
        if (cached) {
          this.editor.loadFromString(cached);
        }
      }
  
      // LOAD PREFS
      Object.keys(this.defaultPrefs).forEach((key) => {
        const storeKey = 'svg-edit-' + key;
        if (this.editor.storage) {
          const val = this.editor.storage.getItem(storeKey);
          if (val) {
            this.defaultPrefs[key] = String(val); // Convert to string for FF (.value fails in Webkit)
          }
        } else if (window.widget) {
          this.defaultPrefs[key] = window.widget.preferenceForKey(storeKey);
        } else {
          const result = document.cookie.match(
            new RegExp('(?:^|;\\s*)' + regexEscape(
              encodeURIComponent(storeKey)
            ) + '=([^;]+)')
          );
          this.defaultPrefs[key] = result ? decodeURIComponent(result[1]) : '';
        }
      });
    }
  
    /**
    * Allows setting of preferences or configuration (including extensions).
    * @function module:SVGEditor.setConfig
    * @param {module:SVGEditor.Config|module:SVGEditor.Prefs} opts The preferences or configuration (including extensions). See the tutorial on {@tutorial ConfigOptions} for info on config and preferences.
    * @param {PlainObject} [cfgCfg] Describes configuration which applies to the
    *    particular batch of supplied options
    * @param {boolean} [cfgCfg.allowInitialUserOverride=false] Set to true if you wish
    *  to allow initial overriding of settings by the user via the URL
    *  (if permitted) or previously stored preferences (if permitted);
    *  note that it will be too late if you make such calls in extension
    *  code because the URL or preference storage settings will
    *   have already taken place.
    * @param {boolean} [cfgCfg.overwrite=true] Set to false if you wish to
    *  prevent the overwriting of prior-set preferences or configuration
    *  (URL settings will always follow this requirement for security
    *  reasons, so `svgedit-config-iife.js` settings cannot be overridden unless it
    *  explicitly permits via `allowInitialUserOverride` but extension config
    *  can be overridden as they will run after URL settings). Should
    *   not be needed in `svgedit-config-iife.js`.
    * @returns {void}
  */
    setConfig (opts, cfgCfg = {}) {
      /**
       *
       * @param {module:SVGEditor.Config|module:SVGEditor.Prefs} cfgObj
       * @param {string} key
       * @param {any} val See {@link module:SVGEditor.Config} or {@link module:SVGEditor.Prefs}
       * @returns {void}
       */
      const extendOrAdd = (cfgObj, key, val) => {
        if (cfgObj[key] && typeof cfgObj[key] === 'object') {
          cfgObj[key] = mergeDeep(cfgObj[key], val);
        } else {
          cfgObj[key] = val;
        }
      };
      Object.entries(opts).forEach(([ key, val ]) => {
        // Only allow prefs defined in configObj.defaultPrefs or...
        if (this.defaultPrefs[key]) {
          if (cfgCfg.overwrite === false && (
            this.curConfig.preventAllURLConfig ||
            this.curPrefs[key])
          ) {
            return;
          }
          if (cfgCfg.allowInitialUserOverride === true) {
            this.defaultPrefs[key] = val;
          } else {
            this.pref(key, val);
          }
        } else if ([ 'extensions', 'userExtensions', 'allowedOrigins' ].includes(key)) {
          if (cfgCfg.overwrite === false &&
            (
              this.curConfig.preventAllURLConfig ||
              [ 'allowedOrigins' ].includes(key) ||
              (key === 'extensions' && this.curConfig.lockExtensions)
            )
          ) {
            return;
          }
          this.curConfig[key] = this.curConfig[key].concat(val); // We will handle any dupes later
        // Only allow other configObj.curConfig if defined in configObj.defaultConfig
        } else if ({}.hasOwnProperty.call(this.defaultConfig, key)) {
          if (cfgCfg.overwrite === false && (
            this.curConfig.preventAllURLConfig ||
            {}.hasOwnProperty.call(this.curConfig, key)
          )) {
            return;
          }
          // Potentially overwriting of previously set config
          if ({}.hasOwnProperty.call(this.curConfig, key)) {
            if (cfgCfg.overwrite === false) {
              return;
            }
            extendOrAdd(this.curConfig, key, val);
          } else if (cfgCfg.allowInitialUserOverride === true) {
            extendOrAdd(this.defaultConfig, key, val);
          } else if (this.defaultConfig[key] && typeof this.defaultConfig[key] === 'object') {
            this.curConfig[key] = Array.isArray(this.defaultConfig[key]) ? [] : {};
            this.curConfig[key] = mergeDeep(this.curConfig[key], val);
          } else {
            this.curConfig[key] = val;
          }
        }
      });
    }
    /**
    * Store and retrieve preferences.
    * @function pref
    * @param {string} key The preference name to be retrieved or set
    * @param {string} [val] The value. If the value supplied is missing or falsey, no change to the preference will
    * be made unless `mayBeEmpty` is set.
    * @param {boolean} [mayBeEmpty] If value may be falsey.
    * @returns {string|void} If val is missing or falsey and `mayBeEmpty` is not set, the
    * value of the previously stored preference will be returned.
    * @todo Review whether any remaining existing direct references to
    *  getting `curPrefs` can be changed to use `svgEditor.configObj.pref()` getting to ensure
    *  `defaultPrefs` fallback (also for sake of `allowInitialUserOverride`);
    *  specifically, `bkgd_color` could be changed so that the pref dialog has a
    *  button to auto-calculate background, but otherwise uses `svgEditor.configObj.pref()` to
    *  be able to get default prefs or overridable settings
    */
    pref (key, val, mayBeEmpty) {
      if (mayBeEmpty || val) {
        this.curPrefs[key] = val;
        return undefined;
      }
      return (key in this.curPrefs) ? this.curPrefs[key] : this.defaultPrefs[key];
    }
    /**
     * @function load load Config
     * @returns {void}
     */
    load () {
      this.loadFromURL(this.editor);
      this.setupCurPrefs(this.editor);
    }
  }
  