1 |
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2 |
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3 |
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4 | 'use strict';
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5 |
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6 | const Base = require('../base/Component');
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7 |
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8 | module.exports = class I18n extends Base {
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9 |
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10 | static getConstants () {
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11 | return {
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12 | CORE_SOURCE: 'areto',
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13 | APP_SOURCE: 'app'
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14 | };
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15 | }
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16 |
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17 | constructor (config) {
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18 | const parent = config.parent;
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19 | super({
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20 | language: parent ? parent.language : 'en',
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21 | sourceLanguage: parent ? parent.sourceLanguage : 'en',
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22 | sources: {},
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23 | MessageFormatter,
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24 | ...config
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25 | });
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26 | this.createSources();
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27 | }
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28 |
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29 | async init () {
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30 | this.messageFormatter = this.spawn(this.MessageFormatter);
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31 | this.resolveSourceParents();
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32 | await this.loadSources();
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33 | }
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34 |
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35 | getSource (name) {
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36 | return Object.prototype.hasOwnProperty.call(this.sources, name) ? this.sources[name] : null;
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37 | }
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38 |
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39 | async loadSources () {
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40 | for (const source of Object.values(this.sources)) {
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41 | await source.load();
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42 | }
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43 | }
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44 |
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45 | createSources () {
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46 | for (const name of Object.keys(this.sources)) {
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47 | this.sources[name] = this.createSource(name, this.sources[name]);
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48 | }
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49 | if (!this.getSource(this.CORE_SOURCE)) {
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50 | this.sources[this.CORE_SOURCE] = this.createCoreSource();
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51 | }
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52 | if (!this.getSource(this.APP_SOURCE)) {
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53 | this.sources[this.APP_SOURCE] = this.createAppSource();
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54 | }
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55 | if (this.parent instanceof I18n) {
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56 | AssignHelper.assignUndefined(this.sources, this.parent.sources);
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57 | }
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58 | }
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59 |
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60 | createCoreSource () {
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61 | if (this.parent) {
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62 | return this.parent.sources[this.CORE_SOURCE];
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63 | }
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64 | return this.createSource(this.CORE_SOURCE, {
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65 | basePath: path.join(__dirname, 'message', this.CORE_SOURCE)
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66 | });
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67 | }
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68 |
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69 | createAppSource () {
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70 | const source = this.createSource(this.APP_SOURCE);
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71 | if (source.parent === undefined && !this.parent) {
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72 | source.setParent(this.sources[this.CORE_SOURCE]);
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73 | }
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74 | return source;
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75 | }
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76 |
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77 | createSource (name, config) {
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78 | if (config instanceof MessageSource) {
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79 | return config;
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80 | }
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81 | return this.spawn({
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82 | Class: FileMessageSource,
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83 | i18n: this,
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84 | basePath: `message/${name}`,
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85 | ...config
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86 | });
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87 | }
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88 |
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89 | resolveSourceParents () {
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90 | for (const name of Object.keys(this.sources)) {
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91 | this.sources[name].setParent(this.resolveSourceParent(name));
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92 | if (ObjectHelper.hasCircularLinks(this.sources[name], 'parent')) {
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93 | throw new Error(`Circular source parents: ${name}`);
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94 | }
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95 | }
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96 | }
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97 |
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98 | resolveSourceParent (name) {
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99 | const parent = this.sources[name].parent;
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100 | if (parent instanceof MessageSource) {
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101 | return parent;
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102 | }
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103 | return parent === undefined
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104 | ? this.getSourceParent(name)
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105 | : this.getSource(parent);
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106 | }
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107 |
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108 | getSourceParent (name) {
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109 | const parent = this.parent;
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110 | return parent ? (parent.getSource(name) || parent.getSourceParent(name)) : null;
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111 | }
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112 |
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113 | format () {
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114 | return this.messageFormatter.format(...arguments);
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115 | }
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116 |
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117 | translate (message, params, name, language = this.language) {
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118 | const source = this.getSource(name);
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119 | if (!source) {
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120 | this.log('error', `Message source not found: ${name}`);
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121 | return message;
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122 | }
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123 | let result;
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124 | if (source.sourceLanguage !== language) {
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125 | result = source.translate(message, language);
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126 | if (result === null) {
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127 | language = source.sourceLanguage;
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128 | if (source.forceTranslation) {
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129 | result = source.translate(message, language);
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130 | }
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131 | }
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132 | } else if (source.forceTranslation) {
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133 | result = source.translate(message, language);
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134 | } else if (source.forceTranslationParent) {
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135 | result = source.forceTranslationParent.translate(message, language);
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136 | }
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137 | message = result || message;
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138 | return params ? this.format(message, params, language) : message;
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139 | }
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140 |
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141 | translateMessage (message) {
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142 | if (Array.isArray(message)) {
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143 | return this.translate(...message);
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144 | }
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145 | if (message instanceof Message) {
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146 | return message.translate(this);
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147 | }
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148 | return this.translate(...arguments);
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149 | }
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150 |
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151 | translateMessageMap (data, ...args) {
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152 | data = {...data};
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153 | for (const key of Object.keys(data)) {
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154 | data[key] = this.translateMessage(data[key], ...args);
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155 | }
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156 | return data;
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157 | }
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158 | };
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159 | module.exports.init();
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160 |
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161 | const path = require('path');
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162 | const AssignHelper = require('../helper/AssignHelper');
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163 | const ObjectHelper = require('../helper/ObjectHelper');
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164 | const MessageSource = require('./MessageSource');
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165 | const FileMessageSource = require('./FileMessageSource');
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166 | const MessageFormatter = require('./MessageFormatter');
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167 | const Message = require('./Message'); |
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