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