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-rw-r--r--dev/manifest-util.js267
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diff --git a/dev/manifest-util.js b/dev/manifest-util.js
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+/*
+ * Copyright (C) 2021 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');
+const childProcess = require('child_process');
+
+
+function clone(value) {
+ return JSON.parse(JSON.stringify(value));
+}
+
+
+class ManifestUtil {
+ constructor() {
+ const fileName = path.join(__dirname, 'data', 'manifest-variants.json');
+ const {manifest, variants, defaultVariant} = JSON.parse(fs.readFileSync(fileName));
+ this._manifest = manifest;
+ this._variants = variants;
+ this._defaultVariant = defaultVariant;
+ this._variantMap = new Map();
+ for (const variant of variants) {
+ this._variantMap.set(variant.name, variant);
+ }
+ }
+
+ getManifest(variantName) {
+ if (typeof variantName === 'string') {
+ const variant = this._variantMap.get(variantName);
+ if (typeof variant !== 'undefined') {
+ return this._createVariantManifest(this._manifest, variant);
+ }
+ }
+
+ if (typeof this._defaultVariant === 'string') {
+ const variant = this._variantMap.get(this._defaultVariant);
+ if (typeof variant !== 'undefined') {
+ return this._createVariantManifest(this._manifest, variant);
+ }
+ }
+
+ return clone(this._manifest);
+ }
+
+ getVariants() {
+ return [...this._variants];
+ }
+
+ getVariant(name) {
+ return this._variantMap.get(name);
+ }
+
+ static createManifestString(manifest) {
+ return JSON.stringify(manifest, null, 4) + '\n';
+ }
+
+ // Private
+
+ _evaluateModificationCommand(data) {
+ const {command, args, trim} = data;
+ const {stdout, status} = childProcess.spawnSync(command, args, {
+ cwd: __dirname,
+ stdio: 'pipe',
+ shell: false
+ });
+ if (status !== 0) {
+ throw new Error(`Failed to execute ${command} ${args.join(' ')}`);
+ }
+ let result = stdout.toString('utf8');
+ if (trim) { result = result.trim(); }
+ return result;
+ }
+
+ _applyModifications(manifest, modifications) {
+ if (Array.isArray(modifications)) {
+ for (const modification of modifications) {
+ const {action, path: path2} = modification;
+ switch (action) {
+ case 'set':
+ {
+ let {value, before, after, command} = modification;
+ const object = this._getObjectProperties(manifest, path2, path2.length - 1);
+ const key = path2[path2.length - 1];
+
+ let {index} = modification;
+ if (typeof index !== 'number') {
+ index = -1;
+ }
+ if (typeof before === 'string') {
+ index = this._getObjectKeyIndex(object, before);
+ }
+ if (typeof after === 'string') {
+ index = this._getObjectKeyIndex(object, after);
+ if (index >= 0) { ++index; }
+ }
+ if (typeof command === 'object' && command !== null) {
+ value = this._evaluateModificationCommand(command);
+ }
+
+ this._setObjectKeyAtIndex(object, key, value, index);
+ }
+ break;
+ case 'replace':
+ {
+ const {pattern, patternFlags, replacement} = modification;
+ const value = this._getObjectProperties(manifest, path2, path2.length - 1);
+ const regex = new RegExp(pattern, patternFlags);
+ const last = path2[path2.length - 1];
+ let value2 = value[last];
+ value2 = `${value2}`.replace(regex, replacement);
+ value[last] = value2;
+ }
+ break;
+ case 'delete':
+ {
+ const value = this._getObjectProperties(manifest, path2, path2.length - 1);
+ const last = path2[path2.length - 1];
+ delete value[last];
+ }
+ break;
+ case 'remove':
+ {
+ const {item} = modification;
+ const value = this._getObjectProperties(manifest, path2, path2.length);
+ const index = value.indexOf(item);
+ if (index >= 0) { value.splice(index, 1); }
+ }
+ break;
+ case 'splice':
+ {
+ const {start, deleteCount, items} = modification;
+ const value = this._getObjectProperties(manifest, path2, path2.length);
+ const itemsNew = items.map((v) => clone(v));
+ value.splice(start, deleteCount, ...itemsNew);
+ }
+ break;
+ case 'copy':
+ case 'move':
+ {
+ const {newPath, before, after} = modification;
+ const oldKey = path2[path2.length - 1];
+ const newKey = newPath[newPath.length - 1];
+ const oldObject = this._getObjectProperties(manifest, path2, path2.length - 1);
+ const newObject = this._getObjectProperties(manifest, newPath, newPath.length - 1);
+ const oldObjectIsNewObject = this._arraysAreSame(path2, newPath, -1);
+ const value = oldObject[oldKey];
+
+ let {index} = modification;
+ if (typeof index !== 'number' || index < 0) {
+ index = (oldObjectIsNewObject && action !== 'copy') ? this._getObjectKeyIndex(oldObject, oldKey) : -1;
+ }
+ if (typeof before === 'string') {
+ index = this._getObjectKeyIndex(newObject, before);
+ }
+ if (typeof after === 'string') {
+ index = this._getObjectKeyIndex(newObject, after);
+ if (index >= 0) { ++index; }
+ }
+
+ this._setObjectKeyAtIndex(newObject, newKey, value, index);
+ if (action !== 'copy' && (!oldObjectIsNewObject || oldKey !== newKey)) {
+ delete oldObject[oldKey];
+ }
+ }
+ break;
+ case 'add':
+ {
+ const {items} = modification;
+ const value = this._getObjectProperties(manifest, path2, path2.length);
+ const itemsNew = items.map((v) => clone(v));
+ value.push(...itemsNew);
+ }
+ break;
+ }
+ }
+ }
+
+ return manifest;
+ }
+
+ _arraysAreSame(array1, array2, lengthOffset) {
+ let ii = array1.length;
+ if (ii !== array2.length) { return false; }
+ ii += lengthOffset;
+ for (let i = 0; i < ii; ++i) {
+ if (array1[i] !== array2[i]) { return false; }
+ }
+ return true;
+ }
+
+ _getObjectKeyIndex(object, key) {
+ return Object.keys(object).indexOf(key);
+ }
+
+ _setObjectKeyAtIndex(object, key, value, index) {
+ if (index < 0 || typeof key === 'number' || Object.prototype.hasOwnProperty.call(object, key)) {
+ object[key] = value;
+ return;
+ }
+
+ const entries = Object.entries(object);
+ index = Math.min(index, entries.length);
+ for (let i = index, ii = entries.length; i < ii; ++i) {
+ const [key2] = entries[i];
+ delete object[key2];
+ }
+ entries.splice(index, 0, [key, value]);
+ for (let i = index, ii = entries.length; i < ii; ++i) {
+ const [key2, value2] = entries[i];
+ object[key2] = value2;
+ }
+ }
+
+ _getObjectProperties(object, path2, count) {
+ for (let i = 0; i < count; ++i) {
+ object = object[path2[i]];
+ }
+ return object;
+ }
+
+ _getInheritanceChain(variant) {
+ const visited = new Set();
+ const inheritance = [];
+ while (true) {
+ const {name, inherit} = variant;
+ if (visited.has(name)) { break; }
+
+ visited.add(name);
+ inheritance.unshift(variant);
+
+ if (typeof inherit !== 'string') { break; }
+
+ const nextVariant = this._variantMap.get(inherit);
+ if (typeof nextVariant === 'undefined') { break; }
+
+ variant = nextVariant;
+ }
+ return inheritance;
+ }
+
+ _createVariantManifest(manifest, variant) {
+ let modifiedManifest = clone(manifest);
+ for (const {modifications} of this._getInheritanceChain(variant)) {
+ modifiedManifest = this._applyModifications(modifiedManifest, modifications);
+ }
+ return modifiedManifest;
+ }
+}
+
+
+module.exports = {
+ ManifestUtil
+};