places/bookmarks

Создание, изменение и удаление закладок.

Usage

Этот модуль экспортирует:

• три конструктора: Bookmark, Group, and Separator, corresponding to the types of objects, referred to as bookmark items, in the Bookmarks database in Firefox
• две дополнительные функции, save() для создания, обновения и удаления закладок, и search() для получения закладок соответствующих параметрам запроса.

save() и search() асинхронные функции: they synchronously return a PlacesEmitter object, which then asynchronously emits events as the operation progresses and completes.

Each retrieved bookmark item represents only a snapshot of state at a specific time. The module does not automatically sync up a Bookmark instance with ongoing changes to that item in the database from the same add-on, other add-ons, or the user.

Примеры

Создание новой закладки

let { Bookmark, save } = require("sdk/places/bookmarks");

// Create a new bookmark instance, unsaved
let bookmark = Bookmark({ title: "Mozilla", url: "https://mozilla.org" });

// Attempt to save the bookmark instance to the Bookmarks database
// and store the emitter
let emitter = save(bookmark);

// Listen for events
emitter.on("data", function (saved, inputItem) {
  // on a "data" event, an item has been updated, passing in the
  // latest snapshot from the server as `saved` (with properties
  // such as `updated` and `id`), as well as the initial input
  // item as `inputItem`
  console.log(saved.title === inputItem.title); // true
  console.log(saved !== inputItem); // true
  console.log(inputItem === bookmark); // true
}).on("end", function (savedItems, inputItems) {
  // Similar to "data" events, except "end" is an aggregate of
  // all progress events, with ordered arrays as `savedItems`
  // and `inputItems`
});

Создание нескольких закладок в группе

let { Bookmark, Group, save } = require("sdk/places/bookmarks");

let group = Group({ title: "Guitars" });
let bookmarks = [
  Bookmark({ title: "Ran", url: "https://ranguitars.com", group: group }),
  Bookmark({ title: "Ibanez", url: "https://ibanez.com", group: group }),
  Bookmark({ title: "ESP", url: "https://espguitars.com", group: group })
];

// Save `bookmarks` array -- notice we don't have `group` in the array,
// although it needs to be saved since all bookmarks are children
// of `group`. This will be saved implicitly.

save(bookmarks).on("data", function (saved, input) {
  // A data event is called once for each item saved, as well
  // as implicit items, like `group`
  console.log(input === group || ~bookmarks.indexOf(input)); // true
}).on("end", function (saves, inputs) {
  // like the previous example, the "end" event returns an
  // array of all of our updated saves. Only explicitly saved
  // items are returned in this array -- the `group` won't be
  // present here.
  console.log(saves[0].title); // "Ran"
  console.log(saves[2].group.title); // "Guitars"
});

Поиск закладок

Bookmarks can be queried with the search() function, which accepts a query object or an array of query objects, as well as a query options object. Query properties are AND'd together within a single query object, but are OR'd together across multiple query objects.

let { search, UNSORTED } = require("sdk/places/bookmarks");

// Simple query with one object
search(
  { query: "firefox" },
  { sort: "title" }
).on(end, function (results) {
  // results matching any bookmark that has "firefox"
  // in its URL, title or tag, sorted by title
});

// Multiple queries are OR'd together
search(
  [{ query: "firefox" }, { group: UNSORTED, tags: ["mozilla"] }],
  { sort: "title" }
).on("end", function (results) {
  // Our first query is the same as the simple query above;
  // all of those results are also returned here. Since multiple
  // queries are OR'd together, we also get bookmarks that
  // match the second query. The second query's properties
  // are AND'd together, so results that are in the platform's unsorted
  // bookmarks folder, AND are also tagged with 'mozilla', get returned
  // as well in this query
});

Globals

Constructors

Bookmark(options)

Creates an unsaved bookmark instance.

Parameters

options : object
Required options:

Optional options:

Group(options)

Creates an unsaved bookmark group instance.

Parameters

options : object
Required options:

Optional options:

Separator(options)

Creates an unsaved bookmark separator instance.

Parameters

options : object
Optional options:

Functions

save(bookmarkItems, options)

Creating, saving, and deleting bookmarks are all done with the save() function. This function takes in any of:

• a bookmark item (Bookmark, Group, Separator)
• a duck-typed object (the relative properties for a bookmark item, in addition to a type property of 'bookmark', 'group', or 'separator')
• an array of bookmark items.

All of the items passed in are pushed to the platform and are either created, updated or deleted.

• adding items: if passing in freshly instantiated bookmark items or a duck-typed object, the item is created on the platform.
• updating items: for an item referenced from a previous save() or from the result of a search() query, changing the properties and calling save() will update the item on the server.
• deleting items: to delete a bookmark item, pass in a bookmark item with a property remove set to true.

The function returns a PlacesEmitter that emits a data event for each item as it is saved, and an end event when all items have been saved.

let { Bookmark, Group } = require("sdk/places/bookmarks");

let myGroup = Group({ title: "My Group" });
let myBookmark = Bookmark({
  title: "Moz",
  url: "https://mozilla.com",
  group: myGroup
});

save(myBookmark).on("data", function (item, inputItem) {
  // The `data` event returns the latest snapshot from the
  // host, so this is a new instance of the bookmark item,
  // where `item !== myBookmark`. To match it with the input item,
  // use the second argument, so `inputItem === myBookmark`

  // All explicitly saved items have data events called, as
  // well as implicitly saved items. In this case,
  // `myGroup` has to be saved before `myBookmark`, since
  // `myBookmark` is a child of `myGroup`. `myGroup` will
  // also have a `data` event called for it.
}).on("end", function (items, inputItems) {
  // The `end` event returns all items that are explicitly
  // saved. So `myGroup` will not be in this array,
  // but `myBookmark` will be.
  // `inputItems` matches the initial input as an array,
  // so `inputItems[0] === myBookmark`
});

// Saving multiple bookmarks, as duck-types in this case

let bookmarks = [
  { title: "mozilla", url: "https://mozilla.org", type: "bookmark" },
  { title: "firefox", url: "https://firefox.com", type: "bookmark" },
  { title: "twitter", url: "https://twitter.com", type: "bookmark" }
];

save(bookmarks).on("data", function (item, inputItem) {
  // Each item in `bookmarks` has its own `data` event
}).on("end", function (results, inputResults) {
  // `results` is an array of items saved in the same order
  // as they were passed in.
});

Parameters

bookmarkItems : bookmark|group|separator|array
A bookmark item (Bookmark, Group, Separator), or an array of bookmark items to be saved.

options : object
Optional options:

Returns

PlacesEmitter : Returns a PlacesEmitter.

remove(items)

A helper function that takes in a bookmark item, or an Array of several bookmark items, and sets each item's remove property to true. This does not remove the bookmark item from the database: it must be subsequently saved.

let { search, save, remove } = require("sdk/places/bookmarks");

search({ tags: ["php"] }).on("end", function (results) {
  // The search returns us all bookmark items that are
  // tagged with `"php"`.

  // We then pass `results` into the remove function to mark
  // all items to be removed, which returns the new modified `Array`
  // of items, which is passed into save.
  save(remove(results)).on("end", function (results) {
    // items tagged with `"php"` are now removed!
  });
})

Parameters

items : Bookmark|Group|Separator|array
A bookmark item, or Array of bookmark items to be transformed to set their remove property to true.

Returns

array : An array of the transformed bookmark items.

search(queries, options)

Queries can be performed on bookmark items by passing in one or more query objects, each of which is given one or more properties.

Within each query object, the properties are AND'd together: so only objects matching all properties are retrieved. Across query objects, the results are OR'd together, meaning that if an item matches any of the query objects, it will be retrieved.

For example, suppose we called search() with two query objects:

[{ url: "mozilla.org", tags: ["mobile"]},
{ tags: ["firefox-os"]}]

This will return:

• all bookmark items from mozilla.org that are also tagged "mobile"
• all bookmark items that are tagged "firefox-os"

An options object may be used to determine overall settings such as sort order and how many objects should be returned.

Parameters

queries : object|array
An Object representing a query, or an Array of Objects representing queries. Each query object can take several properties, which are queried against the bookmarks database. Each property is AND'd together, meaning that bookmarks must match each property within a query object. Multiple query objects are then OR'd together.

options : object
Optional options:

Properties

MENU

This is a constant, default Group on the Firefox platform, the Bookmarks Menu. It can be used in queries or specifying the parent of a bookmark item, but it cannot be modified.

TOOLBAR

This is a constant, default Group on the Firefox platform, the Bookmarks Toolbar. It can be used in queries or specifying the parent of a bookmark item, but it cannot be modified.

UNSORTED

This is a constant, default Group on the Firefox platform, the Unsorted Bookmarks group. It can be used in queries or specifying the parent of a bookmark item, but it cannot be modified.

Bookmark

Properties

title

The bookmark's title.

url

The bookmark's URL.

group

The group instance that the bookmark lives under.

index

The index of the bookmark within its group.

updated

A Unix timestamp indicating when the bookmark was last updated on the platform.

tags

A Set of tags that the bookmark is tagged with.

Group

Properties

title

The bookmark group's title.

group

The group instance that the bookmark group lives under.

index

The index of the bookmark group within its group.

updated

A Unix timestamp indicating when the bookmark was last updated on the platform.

Separator

Properties

group

The group instance that the bookmark group lives under.

index

The index of the bookmark group within its group.

updated

A Unix timestamp indicating when the bookmark was last updated on the platform.

PlacesEmitter

The PlacesEmitter is not exported from the module, but returned from the save and search functions. The PlacesEmitter inherits from event/target, and emits data, error, and end.

data events are emitted for every individual operation (such as: each item saved, or each item found by a search query), whereas end events are emitted as the aggregate of an operation, passing an array of objects into the handler.

Events

data

The data event is emitted when a bookmark item that was passed into the save method has been saved to the platform. This includes implicit saves that are dependencies of the explicit items saved. For example, when creating a new bookmark group with two bookmark items as its children, and explicitly saving the two bookmark children, the unsaved parent group will also emit a data event.

let { Bookmark, Group, save } = require("sdk/places/bookmarks");

let group = Group({ title: "my group" });
let bookmarks = [
  Bookmark({ title: "mozilla", url: "https://mozilla.com", group: group }),
  Bookmark({ title: "w3", url: "https://w3.org", group: group })
];

save(bookmarks).on("data", function (item) {
  // This function will be called three times:
  // once for each bookmark saved
  // once for the new group specified implicitly
  // as the parent of the two items
});

The data event is also called for search requests, with each result being passed individually into its own data event.

let { search } = require("sdk/places/bookmarks");

search({ query: "firefox" }).on("data", function (item) {
  // each bookmark item that matches the query will
  // be called in this function
});

Arguments

Bookmark|Group|Separator : For the save function, this is the saved, latest snapshot of the bookmark item. For search, this is a snapshot of a bookmark returned from the search query.

Bookmark|Group|Separator|object : Only in save data events. The initial instance of the item that was used for the save request.

error

The error event is emitted whenever a bookmark item's save could not be completed.

Arguments

string : A string indicating the error that occurred.

Bookmark|Group|Separator|object : Only in save error events. The initial instance of the item that was used for the save request.

end

The end event is called when all bookmark items and dependencies have been saved, or an aggregate of all items returned from a search query.

Arguments

array : The array is an ordered list of the input bookmark items, replaced with their updated, latest snapshot instances (the first argument in the data handler), or in the case of an error, the initial instance of the item that was used for the save request (the second argument in the data or error handler).