67 lines
1.7 KiB
TypeScript
67 lines
1.7 KiB
TypeScript
export interface BangParameters {
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baseUrl: string;
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id: string;
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name: string;
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searchUrl: string;
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}
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export default class Bang {
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public static parseId(input: string): string | undefined {
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const matches = /(?<id>![a-z\d]+\b)/i.exec(input) ?? undefined;
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if (matches?.groups === undefined) {
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return;
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}
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return matches.groups.id;
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}
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public static parseParameters(input: string, bang: BangParameters): Bang {
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const searchQuery = input.replace(bang.id, '').trim();
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const destination =
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searchQuery.length === 0
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? bang.baseUrl
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: bang.searchUrl.replace(/{{bang}}/g, searchQuery);
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return new Bang(encodeURI(destination), bang);
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}
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public static validate(bang: BangParameters): boolean {
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if (bang.name.length === 0) {
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throw new Error('Bang name cannot be left empty');
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}
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if (!bang.id.startsWith('!')) {
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throw new Error('Bang identifier must start with an exclamation mark');
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}
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if (!/^![a-z\d]+$/i.test(bang.id)) {
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throw new Error('Bang identifier can only have letters and/or numbers');
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}
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try {
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// eslint-disable-next-line no-new
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new URL(bang.baseUrl);
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} catch {
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throw new Error('Bang base link must be a valid URL');
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}
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try {
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// eslint-disable-next-line no-new
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new URL(bang.searchUrl);
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} catch {
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throw new Error('Bang search link must be a valid URL');
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}
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if (!bang.searchUrl.includes('{{bang}}')) {
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throw new Error('Bang search link must include {{bang}}');
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}
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return true;
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}
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constructor(public destination: string, public parameters: BangParameters) {
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this.destination = destination;
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this.parameters = parameters;
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}
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}
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