1 | /** Copyright (c) 2018 Uber Technologies, Inc.
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2 | *
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3 | * This source code is licensed under the MIT license found in the
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4 | * LICENSE file in the root directory of this source tree.
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5 | *
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6 | *
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7 | */
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8 |
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9 | /* eslint-env browser */
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10 | import { FetchToken } from 'fusion-tokens';
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11 | import { createPlugin, unescape, createToken } from 'fusion-core';
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12 | import { UniversalEventsToken } from 'fusion-plugin-universal-events';
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13 |
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14 | function loadTranslations() {
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15 | const element = document.getElementById('__TRANSLATIONS__');
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16 |
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17 | if (!element) {
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18 | throw new Error('[fusion-plugin-i18n] - Could not find a __TRANSLATIONS__ element');
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19 | }
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20 |
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21 | try {
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22 | return JSON.parse(unescape(element.textContent));
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23 | } catch (e) {
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24 | throw new Error('[fusion-plugin-i18n] - Error parsing __TRANSLATIONS__ element content');
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25 | }
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26 | }
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27 |
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28 | export const HydrationStateToken = createToken('HydrationStateToken');
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29 |
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30 | const pluginFactory = () => createPlugin({
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31 | deps: {
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32 | fetch: FetchToken.optional,
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33 | hydrationState: HydrationStateToken.optional,
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34 | events: UniversalEventsToken.optional
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35 | },
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36 | provides: ({
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37 | fetch = window.fetch,
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38 | hydrationState,
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39 | events
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40 | } = {}) => {
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41 | class I18n {
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42 | constructor() {
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43 | const {
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44 | localeCode,
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45 | translations
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46 | } = hydrationState || loadTranslations();
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47 | this.requestedKeys = new Set();
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48 | this.translations = translations || {};
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49 |
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50 | if (localeCode) {
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51 | this.locale = localeCode;
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52 | }
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53 | }
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54 |
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55 | async load(translationKeys) {
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56 | const loadedKeys = Object.keys(this.translations);
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57 | const unloaded = translationKeys.filter(key => {
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58 | return loadedKeys.indexOf(key) < 0 && !this.requestedKeys.has(key);
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59 | });
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60 |
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61 | if (unloaded.length > 0) {
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62 | // Don't try to load translations again if a request is already in
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63 | // flight. This means that we need to add unloaded chunks to
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64 | // loadedChunks optimistically and remove them if some error happens
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65 | unloaded.forEach(key => {
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66 | this.requestedKeys.add(key);
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67 | });
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68 | const fetchOpts = {
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69 | method: 'POST',
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70 | headers: {
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71 | Accept: '*/*',
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72 | 'Content-Type': 'application/json',
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73 | ...(this.locale ? {
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74 | 'X-Fusion-Locale-Code': this.locale
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75 | } : {})
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76 | },
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77 | body: JSON.stringify(unloaded)
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78 | }; // TODO(#3) don't append prefix if injected fetch also injects prefix
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79 |
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80 | return fetch(`/_translations${this.locale ? `?localeCode=${this.locale}` : ''}`, fetchOpts).then(r => r.json()).then(data => {
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81 | for (const key in data) {
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82 | this.translations[key] = data[key];
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83 | this.requestedKeys.delete(key);
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84 | }
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85 | }).catch(err => {
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86 | // An error occurred, so remove the chunks we were trying to load
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87 | // from loadedChunks. This allows us to try to load those chunk
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88 | // translations again
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89 | unloaded.forEach(key => {
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90 | this.requestedKeys.delete(key);
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91 | });
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92 | throw err;
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93 | });
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94 | }
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95 | }
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96 |
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97 | translate(key, interpolations = {}) {
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98 | const template = this.translations[key];
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99 |
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100 | if (typeof template !== 'string') {
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101 | events && events.emit('i18n-translate-miss', {
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102 | key
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103 | });
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104 | return key;
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105 | }
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106 |
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107 | return template.replace(/\${(.*?)}/g, (_, k) => interpolations[k] === void 0 ? '${' + k + '}' : String(interpolations[k]));
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108 | }
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109 |
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110 | }
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111 |
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112 | const i18n = new I18n();
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113 | return {
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114 | from: () => i18n
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115 | };
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116 | }
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117 | });
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118 |
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119 | export default false && pluginFactory();
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Could not find a __TRANSLATIONS__ element'\n    );\n  }\n  try {\n    return JSON.parse(unescape(element.textContent));\n  } catch (e) {\n    throw new Error(\n      '[fusion-plugin-i18n] - Error parsing __TRANSLATIONS__ element content'\n    );\n  }\n}\n\ntype HydrationStateType = {\n  localeCode?: string,\n  translations: TranslationsObjectType,\n};\nexport const HydrationStateToken: Token<HydrationStateType> = createToken(\n  'HydrationStateToken'\n);\n\ntype PluginType = FusionPlugin<I18nDepsType, I18nServiceType>;\nconst pluginFactory: () => PluginType = () =>\n  createPlugin({\n    deps: {\n      fetch: FetchToken.optional,\n      hydrationState: HydrationStateToken.optional,\n      events: UniversalEventsToken.optional,\n    },\n    provides: ({fetch = window.fetch, hydrationState, events} = {}) => {\n      class I18n {\n        locale: string;\n        translations: TranslationsObjectType;\n        requestedKeys: Set<string>;\n\n        constructor() {\n          const {localeCode, translations} =\n            hydrationState || loadTranslations();\n          this.requestedKeys = new Set();\n          this.translations = translations || {};\n          if (localeCode) {\n            this.locale = localeCode;\n          }\n        }\n        async load(translationKeys) {\n          const loadedKeys = Object.keys(this.translations);\n          const unloaded = translationKeys.filter(key => {\n            return loadedKeys.indexOf(key) < 0 && !this.requestedKeys.has(key);\n          });\n          if (unloaded.length > 0) {\n            // Don't try to load translations again if a request is already in\n            // flight. This means that we need to add unloaded chunks to\n            // loadedChunks optimistically and remove them if some error happens\n            unloaded.forEach(key => {\n              this.requestedKeys.add(key);\n            });\n            const fetchOpts = {\n              method: 'POST',\n              headers: {\n                Accept: '*/*',\n                'Content-Type': 'application/json',\n                ...(this.locale ? {'X-Fusion-Locale-Code': this.locale} : {}),\n              },\n              body: JSON.stringify(unloaded),\n            };\n            // TODO(#3) don't append prefix if injected fetch also injects prefix\n            return fetch(\n              `/_translations${\n                this.locale ? `?localeCode=${this.locale}` : ''\n              }`,\n              fetchOpts\n            )\n              .then(r => r.json())\n              .then((data: {[string]: string}) => {\n                for (const key in data) {\n                  this.translations[key] = data[key];\n                  this.requestedKeys.delete(key);\n                }\n              })\n              .catch((err: Error) => {\n                // An error occurred, so remove the chunks we were trying to load\n                // from loadedChunks. This allows us to try to load those chunk\n                // translations again\n                unloaded.forEach(key => {\n                  this.requestedKeys.delete(key);\n                });\n                throw err;\n              });\n          }\n        }\n        translate(key, interpolations = {}) {\n          const template = this.translations[key];\n\n          if (typeof template !== 'string') {\n            events && events.emit('i18n-translate-miss', {key});\n            return key;\n          }\n\n          return template.replace(/\\${(.*?)}/g, (_, k) =>\n            interpolations[k] === void 0\n              ? '${' + k + '}'\n              : String(interpolations[k])\n          );\n        }\n      }\n      const i18n = new I18n();\n      return {from: () => i18n};\n    },\n  });\n\nexport default ((__BROWSER__ && pluginFactory(): any): PluginType);\n"]} |
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