Create dev utility class for some shared functionality (#724)

1 files changed, 79 insertions, 0 deletions

diff --git a/dev/yomichan-util.js b/dev/yomichan-util.js
new file mode 100644
index 00000000..2d8f31ea
--- /dev/null
+++ b/dev/yomichan-util.js
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2020  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+
+let JSZip = null;
+
+
+function getJSZip() {
+    if (JSZip === null) {
+        process.noDeprecation = true; // Suppress a warning about JSZip
+        JSZip = require(path.join(__dirname, '../ext/mixed/lib/jszip.min.js'));
+        process.noDeprecation = false;
+    }
+    return JSZip;
+}
+
+
+function getAllFiles(baseDirectory, relativeTo=null, predicate=null) {
+    const results = [];
+    const directories = [baseDirectory];
+    while (directories.length > 0) {
+        const directory = directories.shift();
+        const fileNames = fs.readdirSync(directory);
+        for (const fileName of fileNames) {
+            const fullFileName = path.join(directory, fileName);
+            const relativeFileName = (relativeTo !== null ? path.relative(relativeTo, fullFileName) : fullFileName);
+            const stats = fs.lstatSync(fullFileName);
+            if (stats.isFile()) {
+                if (typeof predicate !== 'function' || predicate(fullFileName, directory, baseDirectory)) {
+                    results.push(relativeFileName);
+                }
+            } else if (stats.isDirectory()) {
+                directories.push(fullFileName);
+            }
+        }
+    }
+    return results;
+}
+
+function getDefaultManifest() {
+    const {manifest} = getDefaultManifestAndVariants();
+    return manifest;
+}
+
+function getDefaultManifestAndVariants() {
+    const fileName = path.join(__dirname, 'data', 'manifest-variants.json');
+    const {manifest, variants} = JSON.parse(fs.readFileSync(fileName));
+    return {manifest, variants};
+}
+
+function createManifestString(manifest) {
+    return JSON.stringify(manifest, null, 4) + '\n';
+}
+
+
+module.exports = {
+    get JSZip() { return getJSZip(); },
+    getAllFiles,
+    getDefaultManifest,
+    getDefaultManifestAndVariants,
+    createManifestString
+};