Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 519 insertions, 0 deletions

diff --git a/toolkit/components/places/PlacesBackups.sys.mjs b/toolkit/components/places/PlacesBackups.sys.mjs
new file mode 100644
index 0000000000..833e7b0a22
--- /dev/null
+++ b/toolkit/components/places/PlacesBackups.sys.mjs
@@ -0,0 +1,519 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+ * vim: sw=2 ts=2 sts=2 expandtab filetype=javascript
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  PlacesUtils: "resource://gre/modules/PlacesUtils.sys.mjs",
+  BookmarkJSONUtils: "resource://gre/modules/BookmarkJSONUtils.sys.mjs",
+});
+
+XPCOMUtils.defineLazyGetter(
+  lazy,
+  "filenamesRegex",
+  () =>
+    /^bookmarks-([0-9-]+)(?:_([0-9]+)){0,1}(?:_([a-z0-9=+-]{24})){0,1}\.(json(lz4)?)$/i
+);
+
+async function limitBackups(aMaxBackups, backupFiles) {
+  if (
+    typeof aMaxBackups == "number" &&
+    aMaxBackups > -1 &&
+    backupFiles.length >= aMaxBackups
+  ) {
+    let numberOfBackupsToDelete = backupFiles.length - aMaxBackups;
+    while (numberOfBackupsToDelete--) {
+      let oldestBackup = backupFiles.pop();
+      await IOUtils.remove(oldestBackup);
+    }
+  }
+}
+
+/**
+ * Appends meta-data information to a given filename.
+ */
+function appendMetaDataToFilename(aFilename, aMetaData) {
+  let matches = aFilename.match(lazy.filenamesRegex);
+  return (
+    "bookmarks-" +
+    matches[1] +
+    "_" +
+    aMetaData.count +
+    "_" +
+    aMetaData.hash +
+    "." +
+    matches[4]
+  );
+}
+
+/**
+ * Gets the hash from a backup filename.
+ *
+ * @return the extracted hash or null.
+ */
+function getHashFromFilename(aFilename) {
+  let matches = aFilename.match(lazy.filenamesRegex);
+  if (matches && matches[3]) {
+    return matches[3];
+  }
+  return null;
+}
+
+/**
+ * Given two filenames, checks if they contain the same date.
+ */
+function isFilenameWithSameDate(aSourceName, aTargetName) {
+  let sourceMatches = aSourceName.match(lazy.filenamesRegex);
+  let targetMatches = aTargetName.match(lazy.filenamesRegex);
+
+  return sourceMatches && targetMatches && sourceMatches[1] == targetMatches[1];
+}
+
+/**
+ * Given a filename, searches for another backup with the same date.
+ *
+ * @return path string or null.
+ */
+function getBackupFileForSameDate(aFilename) {
+  return (async function () {
+    let backupFiles = await PlacesBackups.getBackupFiles();
+    for (let backupFile of backupFiles) {
+      if (isFilenameWithSameDate(PathUtils.filename(backupFile), aFilename)) {
+        return backupFile;
+      }
+    }
+    return null;
+  })();
+}
+
+export var PlacesBackups = {
+  /**
+   * Matches the backup filename:
+   *  0: file name
+   *  1: date in form Y-m-d
+   *  2: bookmarks count
+   *  3: contents hash
+   *  4: file extension
+   */
+  get filenamesRegex() {
+    return lazy.filenamesRegex;
+  },
+
+  /**
+   * Gets backup folder asynchronously.
+   * @return {Promise}
+   * @resolve the folder (the folder string path).
+   */
+  getBackupFolder: function PB_getBackupFolder() {
+    return (async () => {
+      if (this._backupFolder) {
+        return this._backupFolder;
+      }
+      let backupsDirPath = PathUtils.join(
+        PathUtils.profileDir,
+        this.profileRelativeFolderPath
+      );
+      await IOUtils.makeDirectory(backupsDirPath);
+      return (this._backupFolder = backupsDirPath);
+    })();
+  },
+
+  get profileRelativeFolderPath() {
+    return "bookmarkbackups";
+  },
+
+  /**
+   * Cache current backups in a sorted (by date DESC) array.
+   * @return {Promise}
+   * @resolve a sorted array of string paths.
+   */
+  getBackupFiles: function PB_getBackupFiles() {
+    return (async () => {
+      if (this._backupFiles) {
+        return this._backupFiles;
+      }
+
+      this._backupFiles = [];
+
+      let backupFolderPath = await this.getBackupFolder();
+      let children = await IOUtils.getChildren(backupFolderPath);
+      let list = [];
+      for (const entry of children) {
+        // Since IOUtils I/O is serialized, we can safely remove .tmp files
+        // without risking to remove ongoing backups.
+        let filename = PathUtils.filename(entry);
+        if (filename.endsWith(".tmp")) {
+          list.push(IOUtils.remove(entry));
+          continue;
+        }
+
+        if (lazy.filenamesRegex.test(filename)) {
+          // Remove bogus backups in future dates.
+          if (this.getDateForFile(entry) > new Date()) {
+            list.push(IOUtils.remove(entry));
+            continue;
+          }
+          this._backupFiles.push(entry);
+        }
+      }
+      await Promise.all(list);
+
+      this._backupFiles.sort((a, b) => {
+        let aDate = this.getDateForFile(a);
+        let bDate = this.getDateForFile(b);
+        return bDate - aDate;
+      });
+
+      return this._backupFiles;
+    })();
+  },
+
+  /**
+   * Invalidates the internal cache for testing purposes.
+   */
+  invalidateCache() {
+    this._backupFiles = null;
+  },
+
+  /**
+   * Generates a ISO date string (YYYY-MM-DD) from a Date object.
+   *
+   * @param dateObj
+   *        The date object to parse.
+   * @return an ISO date string.
+   */
+  toISODateString: function toISODateString(dateObj) {
+    if (!dateObj || dateObj.constructor.name != "Date" || !dateObj.getTime()) {
+      throw new Error("invalid date object");
+    }
+    let padDate = val => ("0" + val).substr(-2, 2);
+    return [
+      dateObj.getFullYear(),
+      padDate(dateObj.getMonth() + 1),
+      padDate(dateObj.getDate()),
+    ].join("-");
+  },
+
+  /**
+   * Creates a filename for bookmarks backup files.
+   *
+   * @param [optional] aDateObj
+   *                   Date object used to build the filename.
+   *                   Will use current date if empty.
+   * @param [optional] bool - aCompress
+   *                   Determines if file extension is json or jsonlz4
+                       Default is json
+   * @return A bookmarks backup filename.
+   */
+  getFilenameForDate: function PB_getFilenameForDate(aDateObj, aCompress) {
+    let dateObj = aDateObj || new Date();
+    // Use YYYY-MM-DD (ISO 8601) as it doesn't contain illegal characters
+    // and makes the alphabetical order of multiple backup files more useful.
+    return (
+      "bookmarks-" +
+      PlacesBackups.toISODateString(dateObj) +
+      ".json" +
+      (aCompress ? "lz4" : "")
+    );
+  },
+
+  /**
+   * Creates a Date object from a backup file.  The date is the backup
+   * creation date.
+   *
+   * @param {Sring} aBackupFile The path of the backup.
+   * @return {Date} A Date object for the backup's creation time.
+   */
+  getDateForFile: function PB_getDateForFile(aBackupFile) {
+    let filename = PathUtils.filename(aBackupFile);
+    let matches = filename.match(lazy.filenamesRegex);
+    if (!matches) {
+      throw new Error(`Invalid backup file name: ${filename}`);
+    }
+    return new Date(matches[1].replace(/-/g, "/"));
+  },
+
+  /**
+   * Get the most recent backup file.
+   *
+   * @return {Promise}
+   * @result the path to the file.
+   */
+  getMostRecentBackup: function PB_getMostRecentBackup() {
+    return (async () => {
+      let entries = await this.getBackupFiles();
+      for (let entry of entries) {
+        let rx = /\.json(lz4)?$/;
+        if (PathUtils.filename(entry).match(rx)) {
+          return entry;
+        }
+      }
+      return null;
+    })();
+  },
+
+  /**
+   * Returns whether a recent enough backup exists, using these heuristic: if
+   * a backup exists, it should be newer than the last browser session date,
+   * otherwise it should not be older than maxDays.
+   * If the backup is older than the last session, the calculated time is
+   * reported to telemetry.
+   *
+   * @param [maxDays] The maximum number of days a backup can be old.
+   */
+  async hasRecentBackup({ maxDays = 3 } = {}) {
+    let lastBackupFile = await PlacesBackups.getMostRecentBackup();
+    if (!lastBackupFile) {
+      return false;
+    }
+    let lastBackupTime = PlacesBackups.getDateForFile(lastBackupFile);
+    let profileLastUse = Services.appinfo.replacedLockTime || Date.now();
+    if (lastBackupTime > profileLastUse) {
+      return true;
+    }
+    let backupAge = Math.round((profileLastUse - lastBackupTime) / 86400000);
+    // Telemetry the age of the last available backup.
+    try {
+      Services.telemetry
+        .getHistogramById("PLACES_BACKUPS_DAYSFROMLAST")
+        .add(backupAge);
+    } catch (ex) {
+      console.error(new Error("Unable to report telemetry."));
+    }
+    return backupAge <= maxDays;
+  },
+
+  /**
+   * Serializes bookmarks using JSON, and writes to the supplied file.
+   *
+   * @param aFilePath
+   *        path for the "bookmarks.json" file to be created.
+   * @return {Promise}
+   * @resolves the number of serialized uri nodes.
+   */
+  async saveBookmarksToJSONFile(aFilePath) {
+    let { count: nodeCount, hash: hash } =
+      await lazy.BookmarkJSONUtils.exportToFile(aFilePath);
+
+    let backupFolderPath = await this.getBackupFolder();
+    if (PathUtils.profileDir == backupFolderPath) {
+      // We are creating a backup in the default backups folder,
+      // so just update the internal cache.
+      if (!this._backupFiles) {
+        await this.getBackupFiles();
+      }
+      this._backupFiles.unshift(aFilePath);
+    } else {
+      let aMaxBackup = Services.prefs.getIntPref(
+        "browser.bookmarks.max_backups"
+      );
+      if (aMaxBackup === 0) {
+        if (!this._backupFiles) {
+          await this.getBackupFiles();
+        }
+        limitBackups(aMaxBackup, this._backupFiles);
+        return nodeCount;
+      }
+      // If we are saving to a folder different than our backups folder, then
+      // we also want to create a new compressed version in it.
+      // This way we ensure the latest valid backup is the same saved by the
+      // user.  See bug 424389.
+      let mostRecentBackupFile = await this.getMostRecentBackup();
+      if (
+        !mostRecentBackupFile ||
+        hash != getHashFromFilename(PathUtils.filename(mostRecentBackupFile))
+      ) {
+        let name = this.getFilenameForDate(undefined, true);
+        let newFilename = appendMetaDataToFilename(name, {
+          count: nodeCount,
+          hash,
+        });
+        let newFilePath = PathUtils.join(backupFolderPath, newFilename);
+        let backupFile = await getBackupFileForSameDate(name);
+        if (backupFile) {
+          // There is already a backup for today, replace it.
+          await IOUtils.remove(backupFile);
+          if (!this._backupFiles) {
+            await this.getBackupFiles();
+          } else {
+            this._backupFiles.shift();
+          }
+          this._backupFiles.unshift(newFilePath);
+        } else {
+          // There is no backup for today, add the new one.
+          if (!this._backupFiles) {
+            await this.getBackupFiles();
+          }
+          this._backupFiles.unshift(newFilePath);
+        }
+        let jsonString = await IOUtils.read(aFilePath);
+        await IOUtils.write(newFilePath, jsonString, {
+          compress: true,
+        });
+        await limitBackups(aMaxBackup, this._backupFiles);
+      }
+    }
+    return nodeCount;
+  },
+
+  /**
+   * Creates a dated backup in <profile>/bookmarkbackups.
+   * Stores the bookmarks using a lz4 compressed JSON file.
+   *
+   * @param [optional] int aMaxBackups
+   *                       The maximum number of backups to keep.  If set to 0
+   *                       all existing backups are removed and aForceBackup is
+   *                       ignored, so a new one won't be created.
+   * @param [optional] bool aForceBackup
+   *                        Forces creating a backup even if one was already
+   *                        created that day (overwrites).
+   * @return {Promise}
+   */
+  create: function PB_create(aMaxBackups, aForceBackup) {
+    return (async () => {
+      if (aMaxBackups === 0) {
+        // Backups are disabled, delete any existing one and bail out.
+        if (!this._backupFiles) {
+          await this.getBackupFiles();
+        }
+        await limitBackups(0, this._backupFiles);
+        return;
+      }
+
+      // Ensure to initialize _backupFiles
+      if (!this._backupFiles) {
+        await this.getBackupFiles();
+      }
+      let newBackupFilename = this.getFilenameForDate(undefined, true);
+      // If we already have a backup for today we should do nothing, unless we
+      // were required to enforce a new backup.
+      let backupFile = await getBackupFileForSameDate(newBackupFilename);
+      if (backupFile && !aForceBackup) {
+        return;
+      }
+
+      if (backupFile) {
+        // In case there is a backup for today we should recreate it.
+        this._backupFiles.shift();
+        await IOUtils.remove(backupFile);
+      }
+
+      // Now check the hash of the most recent backup, and try to create a new
+      // backup, if that fails due to hash conflict, just rename the old backup.
+      let mostRecentBackupFile = await this.getMostRecentBackup();
+      let mostRecentHash =
+        mostRecentBackupFile &&
+        getHashFromFilename(PathUtils.filename(mostRecentBackupFile));
+
+      // Save bookmarks to a backup file.
+      let backupFolder = await this.getBackupFolder();
+      let newBackupFile = PathUtils.join(backupFolder, newBackupFilename);
+      let newFilenameWithMetaData;
+      try {
+        let { count: nodeCount, hash: hash } =
+          await lazy.BookmarkJSONUtils.exportToFile(newBackupFile, {
+            compress: true,
+            failIfHashIs: mostRecentHash,
+          });
+        newFilenameWithMetaData = appendMetaDataToFilename(newBackupFilename, {
+          count: nodeCount,
+          hash,
+        });
+      } catch (ex) {
+        if (!ex.becauseSameHash) {
+          throw ex;
+        }
+        // The last backup already contained up-to-date information, just
+        // rename it as if it was today's backup.
+        this._backupFiles.shift();
+        newBackupFile = mostRecentBackupFile;
+        // Ensure we retain the proper extension when renaming
+        // the most recent backup file.
+        if (/\.json$/.test(PathUtils.filename(mostRecentBackupFile))) {
+          newBackupFilename = this.getFilenameForDate();
+        }
+        newFilenameWithMetaData = appendMetaDataToFilename(newBackupFilename, {
+          count: this.getBookmarkCountForFile(mostRecentBackupFile),
+          hash: mostRecentHash,
+        });
+      }
+
+      // Append metadata to the backup filename.
+      let newBackupFileWithMetadata = PathUtils.join(
+        backupFolder,
+        newFilenameWithMetaData
+      );
+      await IOUtils.move(newBackupFile, newBackupFileWithMetadata);
+      this._backupFiles.unshift(newBackupFileWithMetadata);
+
+      // Limit the number of backups.
+      await limitBackups(aMaxBackups, this._backupFiles);
+    })();
+  },
+
+  /**
+   * Gets the bookmark count for backup file.
+   *
+   * @param aFilePath
+   *        File path The backup file.
+   *
+   * @return the bookmark count or null.
+   */
+  getBookmarkCountForFile: function PB_getBookmarkCountForFile(aFilePath) {
+    let count = null;
+    let filename = PathUtils.filename(aFilePath);
+    let matches = filename.match(lazy.filenamesRegex);
+    if (matches && matches[2]) {
+      count = matches[2];
+    }
+    return count;
+  },
+
+  /**
+   * Gets a bookmarks tree representation usable to create backups in different
+   * file formats.  The root or the tree is PlacesUtils.bookmarks.rootGuid.
+   *
+   * @return an object representing a tree with the places root as its root.
+   *         Each bookmark is represented by an object having these properties:
+   *         * id: the item id (make this not enumerable after bug 824502)
+   *         * title: the title
+   *         * guid: unique id
+   *         * parent: item id of the parent folder, not enumerable
+   *         * index: the position in the parent
+   *         * dateAdded: microseconds from the epoch
+   *         * lastModified: microseconds from the epoch
+   *         * type: type of the originating node as defined in PlacesUtils
+   *         The following properties exist only for a subset of bookmarks:
+   *         * annos: array of annotations
+   *         * uri: url
+   *         * iconUri: favicon's url
+   *         * keyword: associated keyword
+   *         * charset: last known charset
+   *         * tags: csv string of tags
+   *         * root: string describing whether this represents a root
+   *         * children: array of child items in a folder
+   */
+  async getBookmarksTree() {
+    let startTime = Date.now();
+    let root = await lazy.PlacesUtils.promiseBookmarksTree(
+      lazy.PlacesUtils.bookmarks.rootGuid,
+      {
+        includeItemIds: true,
+      }
+    );
+
+    try {
+      Services.telemetry
+        .getHistogramById("PLACES_BACKUPS_BOOKMARKSTREE_MS")
+        .add(Date.now() - startTime);
+    } catch (ex) {
+      console.error("Unable to report telemetry.");
+    }
+    return [root, root.itemsCount];
+  },
+};