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import Key from './Key';
export type BlacklistItemJSON = string | {
url: string,
keys: string[],
};
export type BlacklistJSON = BlacklistItemJSON[];
const regexFromWildcard = (pattern: string): RegExp => {
let regexStr = '^' + pattern.replace(/\*/g, '.*') + '$';
return new RegExp(regexStr);
};
const isArrayOfString = (raw: any): boolean => {
if (!Array.isArray(raw)) {
return false;
}
for (let x of Array.from(raw)) {
if (typeof x !== 'string') {
return false;
}
}
return true;
};
export class BlacklistItem {
public readonly pattern: string;
private regex: RegExp;
public readonly partial: boolean;
public readonly keys: string[];
private readonly keyEntities: Key[];
constructor(
pattern: string,
partial: boolean,
keys: string[]
) {
this.pattern = pattern;
this.regex = regexFromWildcard(pattern);
this.partial = partial;
this.keys = keys;
this.keyEntities = this.keys.map(Key.fromMapKey);
}
static fromJSON(raw: any): BlacklistItem {
if (typeof raw === 'string') {
return new BlacklistItem(raw, false, []);
} else if (typeof raw === 'object' && raw !== null) {
if (!('url' in raw)) {
throw new TypeError(
`missing field "url" of blacklist item: ${JSON.stringify(raw)}`);
}
if (typeof raw.url !== 'string') {
throw new TypeError(
`invalid field "url" of blacklist item: ${JSON.stringify(raw)}`);
}
if (!('keys' in raw)) {
throw new TypeError(
`missing field "keys" of blacklist item: ${JSON.stringify(raw)}`);
}
if (!isArrayOfString(raw.keys)) {
throw new TypeError(
`invalid field "keys" of blacklist item: ${JSON.stringify(raw)}`);
}
return new BlacklistItem(raw.url as string, true, raw.keys as string[]);
}
throw new TypeError(
`invalid format of blacklist item: ${JSON.stringify(raw)}`);
}
toJSON(): BlacklistItemJSON {
if (!this.partial) {
return this.pattern;
}
return { url: this.pattern, keys: this.keys };
}
matches(url: URL): boolean {
return this.pattern.includes('/')
? this.regex.test(url.host + url.pathname)
: this.regex.test(url.host);
}
includeKey(url: URL, key: Key): boolean {
if (!this.matches(url)) {
return false;
}
if (!this.partial) {
return true;
}
return this.keyEntities.some(k => k.equals(key));
}
}
export default class Blacklist {
constructor(
public readonly items: BlacklistItem[],
) {
}
static fromJSON(json: any): Blacklist {
if (!Array.isArray(json)) {
throw new TypeError('blacklist is not an array: ' + JSON.stringify(json));
}
let items = Array.from(json).map(item => BlacklistItem.fromJSON(item));
return new Blacklist(items);
}
toJSON(): BlacklistJSON {
return this.items.map(item => item.toJSON());
}
includesEntireBlacklist(url: URL): boolean {
return this.items.some(item => !item.partial && item.matches(url));
}
includeKey(url: URL, key: Key) {
return this.items.some(item => item.includeKey(url, key));
}
}
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