puyoskey/packages/backend/src/server/api/mastodon/converters.ts
2023-09-24 00:39:33 +02:00

137 lines
4.4 KiB
TypeScript

import { Entity } from "megalodon";
const CHAR_COLLECTION: string = "0123456789abcdefghijklmnopqrstuvwxyz";
export enum IdConvertType {
MastodonId,
SharkeyId,
}
export function convertId(in_id: string, id_convert_type: IdConvertType): string {
switch (id_convert_type) {
case IdConvertType.MastodonId:
let out: bigint = BigInt(0);
const lowerCaseId = in_id.toLowerCase();
for (let i = 0; i < lowerCaseId.length; i++) {
const charValue = numFromChar(lowerCaseId.charAt(i));
out += BigInt(charValue) * BigInt(36) ** BigInt(i);
}
return out.toString();
case IdConvertType.SharkeyId:
let input: bigint = BigInt(in_id);
let outStr = '';
while (input > BigInt(0)) {
const remainder = Number(input % BigInt(36));
outStr = charFromNum(remainder) + outStr;
input /= BigInt(36);
}
let ReversedoutStr = outStr.split("").reduce((acc, char) => char + acc, "");
return ReversedoutStr;
default:
throw new Error('Invalid ID conversion type');
}
}
function numFromChar(character: string): number {
for (let i = 0; i < CHAR_COLLECTION.length; i++) {
if (CHAR_COLLECTION.charAt(i) === character) {
return i;
}
}
throw new Error('Invalid character in parsed base36 id');
}
function charFromNum(number: number): string {
if (number >= 0 && number < CHAR_COLLECTION.length) {
return CHAR_COLLECTION.charAt(number);
} else {
throw new Error('Invalid number for base-36 encoding');
}
}
function simpleConvert(data: any) {
// copy the object to bypass weird pass by reference bugs
const result = Object.assign({}, data);
result.id = convertId(data.id, IdConvertType.MastodonId);
return result;
}
export function convertAccount(account: Entity.Account) {
return simpleConvert(account);
}
export function convertAnnouncement(announcement: Entity.Announcement) {
return simpleConvert(announcement);
}
export function convertAttachment(attachment: Entity.Attachment) {
return simpleConvert(attachment);
}
export function convertFilter(filter: Entity.Filter) {
return simpleConvert(filter);
}
export function convertList(list: Entity.List) {
return simpleConvert(list);
}
export function convertFeaturedTag(tag: Entity.FeaturedTag) {
return simpleConvert(tag);
}
export function convertNotification(notification: Entity.Notification) {
notification.account = convertAccount(notification.account);
notification.id = convertId(notification.id, IdConvertType.MastodonId);
if (notification.status)
notification.status = convertStatus(notification.status);
if (notification.reaction)
notification.reaction = convertReaction(notification.reaction);
return notification;
}
export function convertPoll(poll: Entity.Poll) {
return simpleConvert(poll);
}
export function convertReaction(reaction: Entity.Reaction) {
if (reaction.accounts) {
reaction.accounts = reaction.accounts.map(convertAccount);
}
return reaction;
}
export function convertRelationship(relationship: Entity.Relationship) {
return simpleConvert(relationship);
}
export function convertStatus(status: Entity.Status) {
status.account = convertAccount(status.account);
status.id = convertId(status.id, IdConvertType.MastodonId);
if (status.in_reply_to_account_id)
status.in_reply_to_account_id = convertId(
status.in_reply_to_account_id,
IdConvertType.MastodonId,
);
if (status.in_reply_to_id)
status.in_reply_to_id = convertId(status.in_reply_to_id, IdConvertType.MastodonId);
status.media_attachments = status.media_attachments.map((attachment) =>
convertAttachment(attachment),
);
status.mentions = status.mentions.map((mention) => ({
...mention,
id: convertId(mention.id, IdConvertType.MastodonId),
}));
if (status.poll) status.poll = convertPoll(status.poll);
if (status.reblog) status.reblog = convertStatus(status.reblog);
if (status.quote) status.quote = convertStatus(status.quote);
status.reactions = status.reactions.map(convertReaction);
return status;
}
export function convertConversation(conversation: Entity.Conversation) {
conversation.id = convertId(conversation.id, IdConvertType.MastodonId);
conversation.accounts = conversation.accounts.map(convertAccount);
if (conversation.last_status) {
conversation.last_status = convertStatus(conversation.last_status);
}
return conversation;
}