path: root/packages/shared/import-export/parsers.ts

// Copied from https://gist.github.com/devster31/4e8c6548fd16ffb75c02e6f24e27f9b9

import * as cheerio from "cheerio";
import { parse } from "csv-parse/sync";
import { z } from "zod";

import { BookmarkTypes } from "../types/bookmarks";
import { zExportSchema } from "./exporters";

export type ImportSource =
  | "html"
  | "pocket"
  | "omnivore"
  | "karakeep"
  | "linkwarden"
  | "tab-session-manager";

export interface ParsedBookmark {
  title: string;
  content?:
    | { type: BookmarkTypes.LINK; url: string }
    | { type: BookmarkTypes.TEXT; text: string };
  tags: string[];
  addDate?: number;
  notes?: string;
  archived?: boolean;
  paths: string[][];
}

function parseNetscapeBookmarkFile(textContent: string): ParsedBookmark[] {
  if (!textContent.startsWith("<!DOCTYPE NETSCAPE-Bookmark-file-1>")) {
    throw Error("The uploaded html file does not seem to be a bookmark file");
  }

  const $ = cheerio.load(textContent);

  return $("a")
    .map(function (_index, a) {
      const $a = $(a);
      const addDate = $a.attr("add_date");
      let tags: string[] = [];

      const tagsStr = $a.attr("tags");
      try {
        tags = tagsStr && tagsStr.length > 0 ? tagsStr.split(",") : [];
      } catch {
        /* empty */
      }
      const url = $a.attr("href");

      // Build folder path by traversing up the hierarchy
      const path: string[] = [];
      let current = $a.parent();
      while (current && current.length > 0) {
        const h3 = current.find("> h3").first();
        if (h3.length > 0) {
          path.unshift(h3.text());
        }
        current = current.parent();
      }

      return {
        title: $a.text(),
        content: url ? { type: BookmarkTypes.LINK as const, url } : undefined,
        tags,
        addDate: typeof addDate === "undefined" ? undefined : parseInt(addDate),
        paths: [path],
      };
    })
    .get();
}

function parsePocketBookmarkFile(textContent: string): ParsedBookmark[] {
  const records = parse(textContent, {
    columns: true,
    skip_empty_lines: true,
  }) as {
    title: string;
    url: string;
    time_added: string;
    tags: string;
    status?: string;
  }[];

  return records.map((record) => {
    return {
      title: record.title,
      content: { type: BookmarkTypes.LINK as const, url: record.url },
      tags: record.tags.length > 0 ? record.tags.split("|") : [],
      addDate: parseInt(record.time_added),
      archived: record.status === "archive",
      paths: [], // TODO
    };
  });
}

function parseKarakeepBookmarkFile(textContent: string): ParsedBookmark[] {
  const parsed = zExportSchema.safeParse(JSON.parse(textContent));
  if (!parsed.success) {
    throw new Error(
      `The uploaded JSON file contains an invalid bookmark file: ${parsed.error.toString()}`,
    );
  }

  return parsed.data.bookmarks.map((bookmark) => {
    let content = undefined;
    if (bookmark.content?.type == BookmarkTypes.LINK) {
      content = {
        type: BookmarkTypes.LINK as const,
        url: bookmark.content.url,
      };
    } else if (bookmark.content?.type == BookmarkTypes.TEXT) {
      content = {
        type: BookmarkTypes.TEXT as const,
        text: bookmark.content.text,
      };
    }
    return {
      title: bookmark.title ?? "",
      content,
      tags: bookmark.tags,
      addDate: bookmark.createdAt,
      notes: bookmark.note ?? undefined,
      archived: bookmark.archived,
      paths: [], // TODO
    };
  });
}

function parseOmnivoreBookmarkFile(textContent: string): ParsedBookmark[] {
  const zOmnivoreExportSchema = z.array(
    z.object({
      title: z.string(),
      url: z.string(),
      labels: z.array(z.string()),
      savedAt: z.coerce.date(),
      state: z.string().optional(),
    }),
  );

  const parsed = zOmnivoreExportSchema.safeParse(JSON.parse(textContent));
  if (!parsed.success) {
    throw new Error(
      `The uploaded JSON file contains an invalid omnivore bookmark file: ${parsed.error.toString()}`,
    );
  }

  return parsed.data.map((bookmark) => {
    return {
      title: bookmark.title ?? "",
      content: { type: BookmarkTypes.LINK as const, url: bookmark.url },
      tags: bookmark.labels,
      addDate: bookmark.savedAt.getTime() / 1000,
      archived: bookmark.state === "Archived",
      paths: [],
    };
  });
}

function parseLinkwardenBookmarkFile(textContent: string): ParsedBookmark[] {
  const zLinkwardenExportSchema = z.object({
    collections: z.array(
      z.object({
        links: z.array(
          z.object({
            name: z.string(),
            url: z.string(),
            tags: z.array(z.object({ name: z.string() })),
            createdAt: z.coerce.date(),
          }),
        ),
      }),
    ),
  });

  const parsed = zLinkwardenExportSchema.safeParse(JSON.parse(textContent));
  if (!parsed.success) {
    throw new Error(
      `The uploaded JSON file contains an invalid Linkwarden bookmark file: ${parsed.error.toString()}`,
    );
  }

  return parsed.data.collections.flatMap((collection) => {
    return collection.links.map((bookmark) => ({
      title: bookmark.name ?? "",
      content: { type: BookmarkTypes.LINK as const, url: bookmark.url },
      tags: bookmark.tags.map((tag) => tag.name),
      addDate: bookmark.createdAt.getTime() / 1000,
      paths: [], // TODO
    }));
  });
}

function parseTabSessionManagerStateFile(
  textContent: string,
): ParsedBookmark[] {
  const zTab = z.object({
    url: z.string(),
    title: z.string(),
    lastAccessed: z.number(),
  });

  const zSession = z.object({
    windows: z.record(z.string(), z.record(z.string(), zTab)),
    date: z.number(),
  });

  const zTabSessionManagerSchema = z.array(zSession);

  const parsed = zTabSessionManagerSchema.safeParse(JSON.parse(textContent));
  if (!parsed.success) {
    throw new Error(
      `The uploaded JSON file contains an invalid Tab Session Manager bookmark file: ${parsed.error.toString()}`,
    );
  }

  // Get the object in data that has the most recent `date`
  const { windows } = parsed.data.reduce((prev, curr) =>
    prev.date > curr.date ? prev : curr,
  );

  return Object.values(windows).flatMap((window) =>
    Object.values(window).map((tab) => ({
      title: tab.title,
      content: { type: BookmarkTypes.LINK as const, url: tab.url },
      tags: [],
      addDate: tab.lastAccessed,
      paths: [], // Tab Session Manager doesn't have folders
    })),
  );
}

function deduplicateBookmarks(bookmarks: ParsedBookmark[]): ParsedBookmark[] {
  const deduplicatedBookmarksMap = new Map<string, ParsedBookmark>();
  const textBookmarks: ParsedBookmark[] = [];

  for (const bookmark of bookmarks) {
    if (bookmark.content?.type === BookmarkTypes.LINK) {
      const url = bookmark.content.url;
      if (deduplicatedBookmarksMap.has(url)) {
        const existing = deduplicatedBookmarksMap.get(url)!;
        // Merge tags
        existing.tags = [...new Set([...existing.tags, ...bookmark.tags])];
        // Merge paths
        existing.paths = [...existing.paths, ...bookmark.paths];
        const existingDate = existing.addDate ?? Infinity;
        const newDate = bookmark.addDate ?? Infinity;
        if (newDate < existingDate) {
          existing.addDate = bookmark.addDate;
        }
        // Append notes if both exist
        if (existing.notes && bookmark.notes) {
          existing.notes = `${existing.notes}\n---\n${bookmark.notes}`;
        } else if (bookmark.notes) {
          existing.notes = bookmark.notes;
        }
        // For archived status, prefer archived if either is archived
        if (bookmark.archived === true) {
          existing.archived = true;
        }
        // Title: keep existing one for simplicity
      } else {
        deduplicatedBookmarksMap.set(url, bookmark);
      }
    } else {
      // Keep text bookmarks as they are (no URL to dedupe on)
      textBookmarks.push(bookmark);
    }
  }

  return [...deduplicatedBookmarksMap.values(), ...textBookmarks];
}

export function parseImportFile(
  source: ImportSource,
  textContent: string,
): ParsedBookmark[] {
  let result: ParsedBookmark[];
  switch (source) {
    case "html":
      result = parseNetscapeBookmarkFile(textContent);
      break;
    case "pocket":
      result = parsePocketBookmarkFile(textContent);
      break;
    case "karakeep":
      result = parseKarakeepBookmarkFile(textContent);
      break;
    case "omnivore":
      result = parseOmnivoreBookmarkFile(textContent);
      break;
    case "linkwarden":
      result = parseLinkwardenBookmarkFile(textContent);
      break;
    case "tab-session-manager":
      result = parseTabSessionManagerStateFile(textContent);
      break;
  }
  return deduplicateBookmarks(result);
}