create map-i18n to aid with transforming the i18n entries not to waste them

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

scripts/map-i18n.js

@@ -0,0 +1,69 @@
+#!/usr/bin/env node
+
+/*
+Copyright 2018 New Vector Ltd
+
+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
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+/*
+ * Looks through all the translation files and maps matches of fromRegex
+ * in both key and value of the i18n translation to toStr where i18nKeyRegex
+ * matches. Simplifies changing from text to react replacements.
+ * e.g:
+ * node scripts\map-i18n.js "%\(targetName\)s accepted the invitation for %\(displayName\)s\." "%\(targetName\)s" "<target>"
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+const I18NDIR = 'src/i18n/strings';
+
+if (process.argv.length !== 5) {
+    console.error("Required exactly 3 arguments");
+    console.info("Usage: <i18n_key> <fromStr> <toStr>");
+    return;
+}
+
+const [, , i18nKey, fromStr, toStr] = process.argv;
+const i18nKeyRegex = new RegExp(i18nKey, 'i');
+const fromRegex = new RegExp(fromStr, 'i');
+
+console.info(`Replacing instances of "${fromRegex}" with "${toStr}" in keys and values where key matches "${i18nKey}"`);
+
+for (const filename of fs.readdirSync(I18NDIR)) {
+    if (!filename.endsWith('.json')) continue;
+
+    let numChanged = 0;
+
+    const trs = JSON.parse(fs.readFileSync(path.join(I18NDIR, filename)));
+    for (const tr of Object.keys(trs)) {
+        if (i18nKeyRegex.test(tr) && (fromRegex.test(tr) || fromRegex.test(tr))) {
+            const v = trs[tr];
+            delete trs[tr];
+
+            trs[tr.replace(fromRegex, toStr)] = v.replace(fromRegex, toStr);
+            numChanged++;
+        }
+    }
+
+    if (numChanged > 0) {
+        console.log(`${filename}: transformed ${numChanged} translations`);
+        // XXX: This is totally relying on the impl serialising the JSON object in the
+        // same order as they were parsed from the file. JSON.stringify() has a specific argument
+        // that can be used to control the order, but JSON.parse() lacks any kind of equivalent.
+        // Empirically this does maintain the order on my system, so I'm going to leave it like
+        // this for now.
+        fs.writeFileSync(path.join(I18NDIR, filename), JSON.stringify(trs, undefined, 4) + "\n");
+    }
+}