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 node */
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10 | import { Locale } from 'locale';
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11 | import { createPlugin, memoize, html } from 'fusion-core';
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12 | import { UniversalEventsToken } from 'fusion-plugin-universal-events';
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13 | import bodyparser from 'koa-bodyparser';
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14 | import querystring from 'querystring';
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15 | import { I18nLoaderToken } from './tokens.js';
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16 | import createLoader from './loader.js';
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17 | // exported for testing
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18 | export function matchesLiteralSections(literalSections) {
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19 | return translation => {
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20 | let lastMatchIndex = 0;
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21 |
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22 | if (literalSections.length === 1) {
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23 | const literal = literalSections[0];
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24 | return literal !== '' && translation === literal;
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25 | }
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26 |
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27 | return literalSections.every((literal, literalIndex) => {
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28 | if (literal === '') {
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29 | // literal section either:
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30 | // - starts/ends the literal
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31 | // - is the result of two adjacent interpolations
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32 | return true;
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33 | } else if (literalIndex === 0 && translation.startsWith(literal)) {
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34 | lastMatchIndex += literal.length;
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35 | return true;
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36 | } else if (literalIndex === literalSections.length - 1 && translation.endsWith(literal)) {
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37 | return true;
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38 | } else {
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39 | // start search from `lastMatchIndex`
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40 | const matchIndex = translation.indexOf(literal, lastMatchIndex);
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41 |
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42 | if (matchIndex !== -1) {
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43 | lastMatchIndex = matchIndex + literal.length;
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44 | return true;
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45 | }
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46 | } // matching failed
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47 |
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48 |
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49 | return false;
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50 | });
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51 | };
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52 | }
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53 |
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54 | function getKeysFromContext(ctx) {
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55 | if (ctx.request.body && Array.isArray(ctx.request.body)) {
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56 | return ctx.request.body;
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57 | }
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58 |
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59 | const querystringParams = querystring.parse(ctx.querystring);
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60 |
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61 | if (querystringParams.keys) {
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62 | try {
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63 | const keys = JSON.parse(querystringParams.keys);
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64 | return Array.isArray(keys) ? keys : [];
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65 | } catch (e) {
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66 | return [];
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67 | }
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68 | }
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69 |
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70 | return [];
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71 | }
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72 |
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73 | const pluginFactory = () => createPlugin({
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74 | deps: {
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75 | loader: I18nLoaderToken.optional,
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76 | events: UniversalEventsToken.optional
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77 | },
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78 | provides: ({
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79 | loader,
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80 | events
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81 | }) => {
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82 | class I18n {
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83 | constructor(ctx) {
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84 | if (!loader) {
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85 | loader = createLoader();
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86 | }
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87 |
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88 | const {
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89 | translations,
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90 | locale
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91 | } = loader.from(ctx);
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92 | this.emitter = events && events.from(ctx);
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93 | this.translations = translations;
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94 | this.locale = locale;
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95 | }
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96 |
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97 | async load() {} //mirror client API
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98 |
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99 |
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100 | translate(key, interpolations = {}) {
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101 | const template = this.translations[key];
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102 |
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103 | if (typeof template !== 'string') {
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104 | this.emitter && this.emitter.emit('i18n-translate-miss', {
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105 | key
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106 | });
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107 | return key;
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108 | }
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109 |
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110 | return template.replace(/\${(.*?)}/g, (_, k) => interpolations[k] === void 0 ? '${' + k + '}' : String(interpolations[k]));
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111 | }
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112 |
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113 | }
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114 |
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115 | const service = {
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116 | from: memoize(ctx => new I18n(ctx))
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117 | };
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118 | return service;
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119 | },
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120 | middleware: (_, plugin) => {
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121 | // TODO(#4) refactor: this currently depends on babel plugins in framework's webpack config.
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122 | // Ideally these babel plugins should be part of this package, not hard-coded in framework core
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123 | const chunkTranslationMap = require('../chunk-translation-map');
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124 |
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125 | const parseBody = bodyparser();
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126 | return async (ctx, next) => {
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127 | if (ctx.element) {
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128 | await next();
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129 | const i18n = plugin.from(ctx); // get the webpack chunks that are used and serialize their translations
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130 |
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131 | const chunks = [...ctx.syncChunks, ...ctx.preloadChunks];
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132 | const translations = {};
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133 | const possibleTranslations = i18n.translations ? Object.keys(i18n.translations) : [];
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134 | chunks.forEach(id => {
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135 | const keys = Array.from(chunkTranslationMap.translationsForChunk(id));
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136 | keys.forEach(key => {
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137 | if (Array.isArray(key)) {
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138 | const matches = possibleTranslations.filter(matchesLiteralSections(key));
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139 |
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140 | for (const match of matches) {
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141 | translations[match] = i18n.translations && i18n.translations[match];
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142 | }
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143 | } else {
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144 | translations[key] = i18n.translations && i18n.translations[key];
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145 | }
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146 | });
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147 | }); // i18n.locale is actually a locale.Locale instance
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148 |
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149 | if (!i18n.locale) {
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150 | throw new Error('i18n.locale was empty');
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151 | }
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152 |
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153 | const localeCode = typeof i18n.locale === 'string' ? i18n.locale : i18n.locale.code;
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154 | const serialized = JSON.stringify({
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155 | localeCode,
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156 | translations
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157 | });
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158 | const script = html`
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159 | <script type="application/json" id="__TRANSLATIONS__">
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160 | ${serialized}
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161 | </script>
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162 | `; // consumed by ./browser
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163 |
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164 | ctx.template.body.push(script); // set HTML lang tag as a hint for signal screen readers to switch to the
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165 | // recommended language.
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166 |
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167 | ctx.template.htmlAttrs.lang = localeCode;
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168 | } else if (ctx.path === '/_translations') {
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169 | const i18n = plugin.from(ctx);
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170 |
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171 | try {
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172 | await parseBody(ctx, () => Promise.resolve());
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173 | } catch (e) {
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174 | ctx.request.body = [];
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175 | }
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176 |
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177 | const keys = getKeysFromContext(ctx);
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178 | const possibleTranslations = i18n.translations ? Object.keys(i18n.translations) : [];
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179 | const translations = keys.reduce((acc, key) => {
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180 | if (Array.isArray(key)) {
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181 | const matches = possibleTranslations.filter(matchesLiteralSections(key));
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182 |
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183 | for (const match of matches) {
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184 | acc[match] = i18n.translations && i18n.translations[match];
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185 | }
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186 | } else {
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187 | acc[key] = i18n.translations && i18n.translations[key];
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188 | }
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189 |
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190 | return acc;
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191 | }, {});
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192 | ctx.body = translations;
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193 | ctx.set('cache-control', 'public, max-age=3600'); // cache translations for up to 1 hour
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194 |
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195 | return next();
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196 | } else {
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197 | return next();
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198 | }
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199 | };
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200 | }
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201 | });
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202 |
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203 | export default true && pluginFactory();
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204 | //# 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Copyright (c) 2018 Uber Technologies, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n * @flow\n */\n\n/* eslint-env node */\n\nimport {Locale} from 'locale';\n\nimport {createPlugin, memoize, html} from 'fusion-core';\nimport type {FusionPlugin, Context} from 'fusion-core';\nimport {UniversalEventsToken} from 'fusion-plugin-universal-events';\nimport bodyparser from 'koa-bodyparser';\nimport querystring from 'querystring';\n\nimport {I18nLoaderToken} from './tokens.js';\nimport createLoader from './loader.js';\nimport type {\n  I18nDepsType,\n  I18nServiceType,\n  TranslationsObjectType,\n  IEmitter,\n} from './types.js';\n\n// exported for testing\nexport function matchesLiteralSections(literalSections: Array<string>) {\n  return (translation: string) => {\n    let lastMatchIndex = 0;\n\n    if (literalSections.length === 1) {\n      const literal = literalSections[0];\n      return literal !== '' && translation === literal;\n    }\n\n    return literalSections.every((literal, literalIndex) => {\n      if (literal === '') {\n        // literal section either:\n        // - starts/ends the literal\n        // - is the result of two adjacent interpolations\n        return true;\n      } else if (literalIndex === 0 && translation.startsWith(literal)) {\n        lastMatchIndex += literal.length;\n        return true;\n      } else if (\n        literalIndex === literalSections.length - 1 &&\n        translation.endsWith(literal)\n      ) {\n        return true;\n      } else {\n        // start search from `lastMatchIndex`\n        const matchIndex = translation.indexOf(literal, lastMatchIndex);\n        if (matchIndex !== -1) {\n          lastMatchIndex = matchIndex + literal.length;\n          return true;\n        }\n      }\n      // matching failed\n      return false;\n    });\n  };\n}\n\nfunction getKeysFromContext(ctx: Context): string[] {\n  if (ctx.request.body && Array.isArray(ctx.request.body)) {\n    return (ctx.request.body: any);\n  }\n\n  const querystringParams = querystring.parse(ctx.querystring);\n  if (querystringParams.keys) {\n    try {\n      const keys = JSON.parse(querystringParams.keys);\n      return Array.isArray(keys) ? keys : [];\n    } catch (e) {\n      return [];\n    }\n  }\n\n  return [];\n}\n\ntype PluginType = FusionPlugin<I18nDepsType, I18nServiceType>;\nconst pluginFactory: () => PluginType = () =>\n  createPlugin({\n    deps: {\n      loader: I18nLoaderToken.optional,\n      events: UniversalEventsToken.optional,\n    },\n    provides: ({loader, events}) => {\n      class I18n {\n        translations: TranslationsObjectType;\n        locale: string | Locale;\n        emitter: ?IEmitter;\n\n        constructor(ctx) {\n          if (!loader) {\n            loader = createLoader();\n          }\n          const {translations, locale} = loader.from(ctx);\n          this.emitter = events && events.from(ctx);\n          this.translations = translations;\n          this.locale = locale;\n        }\n        async load() {} //mirror client API\n        translate(key, interpolations = {}) {\n          const template = this.translations[key];\n\n          if (typeof template !== 'string') {\n            this.emitter && this.emitter.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\n      const service = {from: memoize(ctx => new I18n(ctx))};\n      return service;\n    },\n    middleware: (_, plugin) => {\n      // TODO(#4) refactor: this currently depends on babel plugins in framework's webpack config.\n      // Ideally these babel plugins should be part of this package, not hard-coded in framework core\n      const chunkTranslationMap = require('../chunk-translation-map');\n      const parseBody = bodyparser();\n\n      return async (ctx, next) => {\n        if (ctx.element) {\n          await next();\n          const i18n = plugin.from(ctx);\n\n          // get the webpack chunks that are used and serialize their translations\n          const chunks: Array<string | number> = [\n            ...ctx.syncChunks,\n            ...ctx.preloadChunks,\n          ];\n          const translations = {};\n          const possibleTranslations = i18n.translations\n            ? Object.keys(i18n.translations)\n            : [];\n          chunks.forEach(id => {\n            const keys = Array.from(\n              chunkTranslationMap.translationsForChunk(id)\n            );\n            keys.forEach(key => {\n              if (Array.isArray(key)) {\n                const matches = possibleTranslations.filter(\n                  matchesLiteralSections(key)\n                );\n                for (const match of matches) {\n                  translations[match] =\n                    i18n.translations && i18n.translations[match];\n                }\n              } else {\n                translations[key] = i18n.translations && i18n.translations[key];\n              }\n            });\n          });\n          // i18n.locale is actually a locale.Locale instance\n          if (!i18n.locale) {\n            throw new Error('i18n.locale was empty');\n          }\n          const localeCode =\n            typeof i18n.locale === 'string' ? i18n.locale : i18n.locale.code;\n          const serialized = JSON.stringify({localeCode, translations});\n          const script = html`\n            <script type=\"application/json\" id=\"__TRANSLATIONS__\">\n              ${serialized}\n            </script>\n          `; // consumed by ./browser\n          ctx.template.body.push(script);\n\n          // set HTML lang tag as a hint for signal screen readers to switch to the\n          // recommended language.\n          ctx.template.htmlAttrs.lang = localeCode;\n        } else if (ctx.path === '/_translations') {\n          const i18n = plugin.from(ctx);\n          try {\n            await parseBody(ctx, () => Promise.resolve());\n          } catch (e) {\n            ctx.request.body = [];\n          }\n          const keys = getKeysFromContext(ctx);\n          const possibleTranslations = i18n.translations\n            ? Object.keys(i18n.translations)\n            : [];\n          const translations = keys.reduce((acc, key) => {\n            if (Array.isArray(key)) {\n              const matches = possibleTranslations.filter(\n                matchesLiteralSections(key)\n              );\n              for (const match of matches) {\n                acc[match] = i18n.translations && i18n.translations[match];\n              }\n            } else {\n              acc[key] = i18n.translations && i18n.translations[key];\n            }\n            return acc;\n          }, {});\n          ctx.body = translations;\n          ctx.set('cache-control', 'public, max-age=3600'); // cache translations for up to 1 hour\n          return next();\n        } else {\n          return next();\n        }\n      };\n    },\n  });\n\nexport default ((__NODE__ && pluginFactory(): any): PluginType);\n"]} |
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