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import Validator from './Validator';
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const Schema = {
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type: 'object',
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properties: {
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default: { type: 'string' },
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engines: {
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type: 'object',
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propertyNames: {
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pattern: '^[A-Za-z_][A-Za-z0-9_]+$',
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},
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patternProperties: {
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'.*': { type: 'string' },
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},
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},
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},
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required: ['default'],
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};
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type Entries = { [name: string]: string };
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export type SearchJSON = {
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default: string;
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engines: { [key: string]: string };
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};
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export default class Search {
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constructor(
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public defaultEngine: string,
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public engines: Entries,
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) {
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}
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static fromJSON(json: unknown): Search {
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let obj = new Validator<SearchJSON>(Schema).validate(json);
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for (let [name, url] of Object.entries(obj.engines)) {
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let matches = url.match(/{}/g);
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if (matches === null) {
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throw new TypeError(`No {}-placeholders in URL of "${name}"`);
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} else if (matches.length > 1) {
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throw new TypeError(`Multiple {}-placeholders in URL of "${name}"`);
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}
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}
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if (!Object.keys(obj.engines).includes(obj.default)) {
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throw new TypeError(`Default engine "${obj.default}" not found`);
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}
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return new Search(obj.default, obj.engines);
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}
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toJSON(): SearchJSON {
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return {
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default: this.defaultEngine,
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engines: this.engines,
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};
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}
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}
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