84 lines
2.5 KiB
TypeScript
84 lines
2.5 KiB
TypeScript
export function formatAllowFromLowercase(params: {
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allowFrom: Array<string | number>;
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stripPrefixRe?: RegExp;
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}): string[] {
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return params.allowFrom
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.map((entry) => String(entry).trim())
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.filter(Boolean)
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.map((entry) => (params.stripPrefixRe ? entry.replace(params.stripPrefixRe, "") : entry))
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.map((entry) => entry.toLowerCase());
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}
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export function isNormalizedSenderAllowed(params: {
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senderId: string | number;
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allowFrom: Array<string | number>;
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stripPrefixRe?: RegExp;
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}): boolean {
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const normalizedAllow = formatAllowFromLowercase({
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allowFrom: params.allowFrom,
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stripPrefixRe: params.stripPrefixRe,
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});
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if (normalizedAllow.length === 0) {
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return false;
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}
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if (normalizedAllow.includes("*")) {
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return true;
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}
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const sender = String(params.senderId).trim().toLowerCase();
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return normalizedAllow.includes(sender);
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}
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type ParsedChatAllowTarget =
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| { kind: "chat_id"; chatId: number }
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| { kind: "chat_guid"; chatGuid: string }
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| { kind: "chat_identifier"; chatIdentifier: string }
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| { kind: "handle"; handle: string };
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export function isAllowedParsedChatSender<TParsed extends ParsedChatAllowTarget>(params: {
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allowFrom: Array<string | number>;
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sender: string;
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chatId?: number | null;
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chatGuid?: string | null;
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chatIdentifier?: string | null;
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normalizeSender: (sender: string) => string;
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parseAllowTarget: (entry: string) => TParsed;
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}): boolean {
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const allowFrom = params.allowFrom.map((entry) => String(entry).trim());
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if (allowFrom.length === 0) {
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return false;
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}
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if (allowFrom.includes("*")) {
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return true;
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}
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const senderNormalized = params.normalizeSender(params.sender);
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const chatId = params.chatId ?? undefined;
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const chatGuid = params.chatGuid?.trim();
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const chatIdentifier = params.chatIdentifier?.trim();
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for (const entry of allowFrom) {
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if (!entry) {
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continue;
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}
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const parsed = params.parseAllowTarget(entry);
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if (parsed.kind === "chat_id" && chatId !== undefined) {
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if (parsed.chatId === chatId) {
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return true;
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}
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} else if (parsed.kind === "chat_guid" && chatGuid) {
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if (parsed.chatGuid === chatGuid) {
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return true;
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}
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} else if (parsed.kind === "chat_identifier" && chatIdentifier) {
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if (parsed.chatIdentifier === chatIdentifier) {
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return true;
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}
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} else if (parsed.kind === "handle" && senderNormalized) {
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if (parsed.handle === senderNormalized) {
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return true;
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}
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}
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}
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return false;
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}
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