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Shorten the ViewHistory class a little bit
- Replace the manual loop, used to find an existing entry, with the native [`findIndex` method](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex). - Remove the `fingerprint`/`cacheSize` class fields, since they are completely unused.
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@ -26,29 +26,22 @@ const DEFAULT_VIEW_HISTORY_CACHE_SIZE = 20;
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*/
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class ViewHistory {
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constructor(fingerprint, cacheSize = DEFAULT_VIEW_HISTORY_CACHE_SIZE) {
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this.fingerprint = fingerprint;
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this.cacheSize = cacheSize;
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this._initializedPromise = this._readFromStorage().then(databaseStr => {
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const database = JSON.parse(databaseStr || "{}");
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let index = -1;
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if (!Array.isArray(database.files)) {
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database.files = [];
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} else {
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while (database.files.length >= this.cacheSize) {
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while (database.files.length >= cacheSize) {
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database.files.shift();
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}
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for (let i = 0, ii = database.files.length; i < ii; i++) {
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const branch = database.files[i];
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if (branch.fingerprint === this.fingerprint) {
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index = i;
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break;
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}
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}
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index = database.files.findIndex(
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branch => branch.fingerprint === fingerprint
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);
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}
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if (index === -1) {
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index = database.files.push({ fingerprint: this.fingerprint }) - 1;
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index = database.files.push({ fingerprint }) - 1;
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}
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this.file = database.files[index];
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this.database = database;
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