/**
 * @license Angular v9.1.0
 * (c) 2010-2020 Google LLC. https://angular.io/
 * License: MIT
 */

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/compiler')) :
    typeof define === 'function' && define.amd ? define('@angular/localize', ['exports', '@angular/compiler'], factory) :
    (global = global || self, factory((global.ng = global.ng || {}, global.ng.localize = {}), global.ng.compiler));
}(this, (function (exports, compiler) { 'use strict';

    /**
     * @license
     * Copyright Google Inc. All Rights Reserved.
     *
     * Use of this source code is governed by an MIT-style license that can be
     * found in the LICENSE file at https://angular.io/license
     */
    /**
     * The character used to mark the start and end of a "block" in a `$localize` tagged string.
     * A block can indicate metadata about the message or specify a name of a placeholder for a
     * substitution expressions.
     *
     * For example:
     *
     * ```ts
     * $localize`Hello, ${title}:title:!`;
     * $localize`:meaning|description@@id:source message text`;
     * ```
     */
    var BLOCK_MARKER = ':';
    /**
     * The marker used to separate a message's "meaning" from its "description" in a metadata block.
     *
     * For example:
     *
     * ```ts
     * $localize `:correct|Indicates that the user got the answer correct: Right!`;
     * $localize `:movement|Button label for moving to the right: Right!`;
     * ```
     */
    var MEANING_SEPARATOR = '|';
    /**
     * The marker used to separate a message's custom "id" from its "description" in a metadata block.
     *
     * For example:
     *
     * ```ts
     * $localize `:A welcome message on the home page@@myApp-homepage-welcome: Welcome!`;
     * ```
     */
    var ID_SEPARATOR = '@@';
    /**
     * The marker used to separate legacy message ids from the rest of a metadata block.
     *
     * For example:
     *
     * ```ts
     * $localize `:@@custom-id␟2df64767cd895a8fabe3e18b94b5b6b6f9e2e3f0: Welcome!`;
     * ```
     *
     * Note that this character is the "symbol for the unit separator" (␟) not the "unit separator
     * character" itself, since that has no visual representation. See https://graphemica.com/%E2%90%9F.
     *
     * Here is some background for the original "unit separator character":
     * https://stackoverflow.com/questions/8695118/whats-the-file-group-record-unit-separator-control-characters-and-its-usage
     */
    var LEGACY_ID_INDICATOR = '\u241F';

    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation. All rights reserved.
    Licensed under the Apache License, Version 2.0 (the "License"); you may not use
    this file except in compliance with the License. You may obtain a copy of the
    License at http://www.apache.org/licenses/LICENSE-2.0

    THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
    WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
    MERCHANTABLITY OR NON-INFRINGEMENT.

    See the Apache Version 2.0 License for specific language governing permissions
    and limitations under the License.
    ***************************************************************************** */
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    /**
     * Parse a `$localize` tagged string into a structure that can be used for translation.
     *
     * See `ParsedMessage` for an example.
     */
    function parseMessage(messageParts, expressions) {
        var substitutions = {};
        var metadata = parseMetadata(messageParts[0], messageParts.raw[0]);
        var cleanedMessageParts = [metadata.text];
        var placeholderNames = [];
        var messageString = metadata.text;
        for (var i = 1; i < messageParts.length; i++) {
            var _a = splitBlock(messageParts[i], messageParts.raw[i]), messagePart = _a.text, _b = _a.block, placeholderName = _b === void 0 ? computePlaceholderName(i) : _b;
            messageString += "{$" + placeholderName + "}" + messagePart;
            if (expressions !== undefined) {
                substitutions[placeholderName] = expressions[i - 1];
            }
            placeholderNames.push(placeholderName);
            cleanedMessageParts.push(messagePart);
        }
        var messageId = metadata.id || compiler.computeMsgId(messageString, metadata.meaning || '');
        var legacyIds = metadata.legacyIds.filter(function (id) { return id !== messageId; });
        return {
            messageId: messageId,
            legacyIds: legacyIds,
            substitutions: substitutions,
            messageString: messageString,
            meaning: metadata.meaning || '',
            description: metadata.description || '',
            messageParts: cleanedMessageParts, placeholderNames: placeholderNames,
        };
    }
    /**
     * Parse the given message part (`cooked` + `raw`) to extract the message metadata from the text.
     *
     * If the message part has a metadata block this function will extract the `meaning`,
     * `description`, `customId` and `legacyId` (if provided) from the block. These metadata properties
     * are serialized in the string delimited by `|`, `@@` and `␟` respectively.
     *
     * (Note that `␟` is the `LEGACY_ID_INDICATOR` - see `constants.ts`.)
     *
     * For example:
     *
     * ```ts
     * `:meaning|description@@custom-id`
     * `:meaning|@@custom-id`
     * `:meaning|description`
     * `description@@custom-id`
     * `meaning|`
     * `description`
     * `@@custom-id`
     * `:meaning|description@@custom-id␟legacy-id-1␟legacy-id-2`
     * ```
     *
     * @param cooked The cooked version of the message part to parse.
     * @param raw The raw version of the message part to parse.
     * @returns A object containing any metadata that was parsed from the message part.
     */
    function parseMetadata(cooked, raw) {
        var _a = splitBlock(cooked, raw), text = _a.text, block = _a.block;
        if (block === undefined) {
            return { text: text, meaning: undefined, description: undefined, id: undefined, legacyIds: [] };
        }
        else {
            var _b = __read(block.split(LEGACY_ID_INDICATOR)), meaningDescAndId = _b[0], legacyIds = _b.slice(1);
            var _c = __read(meaningDescAndId.split(ID_SEPARATOR, 2), 2), meaningAndDesc = _c[0], id = _c[1];
            var _d = __read(meaningAndDesc.split(MEANING_SEPARATOR, 2), 2), meaning = _d[0], description = _d[1];
            if (description === undefined) {
                description = meaning;
                meaning = undefined;
            }
            if (description === '') {
                description = undefined;
            }
            return { text: text, meaning: meaning, description: description, id: id, legacyIds: legacyIds };
        }
    }
    /**
     * Split a message part (`cooked` + `raw`) into an optional delimited "block" off the front and the
     * rest of the text of the message part.
     *
     * Blocks appear at the start of message parts. They are delimited by a colon `:` character at the
     * start and end of the block.
     *
     * If the block is in the first message part then it will be metadata about the whole message:
     * meaning, description, id.  Otherwise it will be metadata about the immediately preceding
     * substitution: placeholder name.
     *
     * Since blocks are optional, it is possible that the content of a message block actually starts
     * with a block marker. In this case the marker must be escaped `\:`.
     *
     * @param cooked The cooked version of the message part to parse.
     * @param raw The raw version of the message part to parse.
     * @returns An object containing the `text` of the message part and the text of the `block`, if it
     * exists.
     * @throws an error if the `block` is unterminated
     */
    function splitBlock(cooked, raw) {
        if (raw.charAt(0) !== BLOCK_MARKER) {
            return { text: cooked };
        }
        else {
            var endOfBlock = findEndOfBlock(cooked, raw);
            return {
                block: cooked.substring(1, endOfBlock),
                text: cooked.substring(endOfBlock + 1),
            };
        }
    }
    function computePlaceholderName(index) {
        return index === 1 ? 'PH' : "PH_" + (index - 1);
    }
    /**
     * Find the end of a "marked block" indicated by the first non-escaped colon.
     *
     * @param cooked The cooked string (where escaped chars have been processed)
     * @param raw The raw string (where escape sequences are still in place)
     *
     * @returns the index of the end of block marker
     * @throws an error if the block is unterminated
     */
    function findEndOfBlock(cooked, raw) {
        /************************************************************************************************
        * This function is repeated in `src/localize/src/localize.ts` and the two should be kept in sync.
        * (See that file for more explanation of why.)
        ************************************************************************************************/
        for (var cookedIndex = 1, rawIndex = 1; cookedIndex < cooked.length; cookedIndex++, rawIndex++) {
            if (raw[rawIndex] === '\\') {
                rawIndex++;
            }
            else if (cooked[cookedIndex] === BLOCK_MARKER) {
                return cookedIndex;
            }
        }
        throw new Error("Unterminated $localize metadata block in \"" + raw + "\".");
    }

    var MissingTranslationError = /** @class */ (function (_super) {
        __extends(MissingTranslationError, _super);
        function MissingTranslationError(parsedMessage) {
            var _this = _super.call(this, "No translation found for " + describeMessage(parsedMessage) + ".") || this;
            _this.parsedMessage = parsedMessage;
            _this.type = 'MissingTranslationError';
            return _this;
        }
        return MissingTranslationError;
    }(Error));
    function isMissingTranslationError(e) {
        return e.type === 'MissingTranslationError';
    }
    /**
     * Translate the text of the `$localize` tagged-string (i.e. `messageParts` and
     * `substitutions`) using the given `translations`.
     *
     * The tagged-string is parsed to extract its `messageId` which is used to find an appropriate
     * `ParsedTranslation`. If this doesn't match and there are legacy ids then try matching a
     * translation using those.
     *
     * If one is found then it is used to translate the message into a new set of `messageParts` and
     * `substitutions`.
     * The translation may reorder (or remove) substitutions as appropriate.
     *
     * If there is no translation with a matching message id then an error is thrown.
     * If a translation contains a placeholder that is not found in the message being translated then an
     * error is thrown.
     */
    function translate(translations, messageParts, substitutions) {
        var message = parseMessage(messageParts, substitutions);
        // Look up the translation using the messageId, and then the legacyId if available.
        var translation = translations[message.messageId];
        // If the messageId did not match a translation, try matching the legacy ids instead
        for (var i = 0; i < message.legacyIds.length && translation === undefined; i++) {
            translation = translations[message.legacyIds[i]];
        }
        if (translation === undefined) {
            throw new MissingTranslationError(message);
        }
        return [
            translation.messageParts, translation.placeholderNames.map(function (placeholder) {
                if (message.substitutions.hasOwnProperty(placeholder)) {
                    return message.substitutions[placeholder];
                }
                else {
                    throw new Error("There is a placeholder name mismatch with the translation provided for the message " + describeMessage(message) + ".\n" +
                        ("The translation contains a placeholder with name " + placeholder + ", which does not exist in the message."));
                }
            })
        ];
    }
    /**
     * Parse the `messageParts` and `placeholderNames` out of a target `message`.
     *
     * Used by `loadTranslations()` to convert target message strings into a structure that is more
     * appropriate for doing translation.
     *
     * @param message the message to be parsed.
     */
    function parseTranslation(message) {
        var parts = message.split(/{\$([^}]*)}/);
        var messageParts = [parts[0]];
        var placeholderNames = [];
        for (var i = 1; i < parts.length - 1; i += 2) {
            placeholderNames.push(parts[i]);
            messageParts.push("" + parts[i + 1]);
        }
        var rawMessageParts = messageParts.map(function (part) { return part.charAt(0) === BLOCK_MARKER ? '\\' + part : part; });
        return { messageParts: makeTemplateObject(messageParts, rawMessageParts), placeholderNames: placeholderNames };
    }
    /**
     * Create a `ParsedTranslation` from a set of `messageParts` and `placeholderNames`.
     *
     * @param messageParts The message parts to appear in the ParsedTranslation.
     * @param placeholderNames The names of the placeholders to intersperse between the `messageParts`.
     */
    function makeParsedTranslation(messageParts, placeholderNames) {
        if (placeholderNames === void 0) { placeholderNames = []; }
        return { messageParts: makeTemplateObject(messageParts, messageParts), placeholderNames: placeholderNames };
    }
    /**
     * Create the specialized array that is passed to tagged-string tag functions.
     *
     * @param cooked The message parts with their escape codes processed.
     * @param raw The message parts with their escaped codes as-is.
     */
    function makeTemplateObject(cooked, raw) {
        Object.defineProperty(cooked, 'raw', { value: raw });
        return cooked;
    }
    function describeMessage(message) {
        var meaningString = message.meaning && " - \"" + message.meaning + "\"";
        return "\"" + message.messageId + "\" (\"" + message.messageString + "\"" + meaningString + ")";
    }

    /**
     * @license
     * Copyright Google Inc. All Rights Reserved.
     *
     * Use of this source code is governed by an MIT-style license that can be
     * found in the LICENSE file at https://angular.io/license
     */

    /**
     * Load translations for `$localize`.
     *
     * The given `translations` are processed and added to a lookup based on their `MessageId`.
     * A new translation will overwrite a previous translation if it has the same `MessageId`.
     *
     * * If a message is generated by the Angular compiler from an `i18n` marker in a template, the
     *   `MessageId` is passed through to the `$localize` call as a custom `MessageId`. The `MessageId`
     *   will match what is extracted into translation files.
     *
     * * If the translation is from a call to `$localize` in application code, and no custom `MessageId`
     *   is provided, then the `MessageId` can be generated by passing the tagged string message-parts
     *   to the `parseMessage()` function (not currently public API).
     *
     * @publicApi
     *
     */
    function loadTranslations(translations) {
        // Ensure the translate function exists
        if (!$localize.translate) {
            $localize.translate = translate$1;
        }
        if (!$localize.TRANSLATIONS) {
            $localize.TRANSLATIONS = {};
        }
        Object.keys(translations).forEach(function (key) {
            $localize.TRANSLATIONS[key] = parseTranslation(translations[key]);
        });
    }
    /**
     * Remove all translations for `$localize`.
     *
     * @publicApi
     */
    function clearTranslations() {
        $localize.translate = undefined;
        $localize.TRANSLATIONS = {};
    }
    /**
     * Translate the text of the given message, using the loaded translations.
     *
     * This function may reorder (or remove) substitutions as indicated in the matching translation.
     */
    function translate$1(messageParts, substitutions) {
        try {
            return translate($localize.TRANSLATIONS, messageParts, substitutions);
        }
        catch (e) {
            console.warn(e.message);
            return [messageParts, substitutions];
        }
    }

    /**
     * @license
     * Copyright Google Inc. All Rights Reserved.
     *
     * Use of this source code is governed by an MIT-style license that can be
     * found in the LICENSE file at https://angular.io/license
     */

    /**
     * @license
     * Copyright Google Inc. All Rights Reserved.
     *
     * Use of this source code is governed by an MIT-style license that can be
     * found in the LICENSE file at https://angular.io/license
     */

    /**
     * @license
     * Copyright Google Inc. All Rights Reserved.
     *
     * Use of this source code is governed by an MIT-style license that can be
     * found in the LICENSE file at https://angular.io/license
     */

    Object.defineProperty(exports, 'ɵcomputeMsgId', {
        enumerable: true,
        get: function () {
            return compiler.computeMsgId;
        }
    });
    exports.clearTranslations = clearTranslations;
    exports.loadTranslations = loadTranslations;
    exports.ɵMissingTranslationError = MissingTranslationError;
    exports.ɵfindEndOfBlock = findEndOfBlock;
    exports.ɵisMissingTranslationError = isMissingTranslationError;
    exports.ɵmakeParsedTranslation = makeParsedTranslation;
    exports.ɵmakeTemplateObject = makeTemplateObject;
    exports.ɵparseMessage = parseMessage;
    exports.ɵparseMetadata = parseMetadata;
    exports.ɵparseTranslation = parseTranslation;
    exports.ɵsplitBlock = splitBlock;
    exports.ɵtranslate = translate;

    Object.defineProperty(exports, '__esModule', { value: true });

})));
//# sourceMappingURL=localize.umd.js.map
