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GalleryConnector.vala
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GalleryConnector.vala
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/* Copyright 2012-2013 Joe Sapp [email protected]
*
* This software is licensed under the GNU LGPL (version 2.1 or later).
* See the COPYING file in this distribution.
*/
static const string _VERSION = "0.1";
static const string LICENSE = """
The Gallery3Publishing module is free software; you can redistribute it
and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either version 2.1
of the License, or (at your option) any later version.
The Gallery3Publishing module is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with The Gallery3Publishing module; if not, write to the Free
Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA
""";
static const string WEBSITE_URL =
"https://github.com/sappjw/shotwell-gallery3";
// This module's Spit.Module
private class ShotwellPublishingGallery3 : Object, Spit.Module {
private Spit.Pluggable[] pluggables = new Spit.Pluggable[0];
public ShotwellPublishingGallery3(GLib.File module_file) {
GLib.File resource_directory = module_file.get_parent();
pluggables += new Gallery3Service(resource_directory);
}
public unowned string get_module_name() {
return _("Gallery3 publishing module");
}
public unowned string get_version() {
return _VERSION;
}
public unowned string get_id() {
return "org.yorba.shotwell.sharing.gallery3";
}
public unowned Spit.Pluggable[]? get_pluggables() {
return pluggables;
}
}
// This entry point is required for all SPIT modules.
public Spit.Module? spit_entry_point(Spit.EntryPointParams *params) {
params->module_spit_interface =
Spit.negotiate_interfaces(params->host_min_spit_interface,
params->host_max_spit_interface, Spit.CURRENT_INTERFACE);
return (params->module_spit_interface != Spit.UNSUPPORTED_INTERFACE)
? new ShotwellPublishingGallery3(params->module_file) : null;
}
// The Pluggable
public class Gallery3Service : Object, Spit.Pluggable,
Spit.Publishing.Service {
private const string ICON_FILENAME = "gallery3.png";
private static Gdk.Pixbuf[] icon_pixbuf_set = null;
public Gallery3Service(GLib.File resource_directory) {
if (icon_pixbuf_set == null)
icon_pixbuf_set = Resources.load_icon_set(
resource_directory.get_child(ICON_FILENAME));
}
public int get_pluggable_interface(int min_host_interface,
int max_host_interface) {
return Spit.negotiate_interfaces(min_host_interface,
max_host_interface,
Spit.Publishing.CURRENT_INTERFACE);
}
public unowned string get_id() {
return "publishing-gallery3";
}
public unowned string get_pluggable_name() {
return "Gallery3";
}
public void get_info(ref Spit.PluggableInfo info) {
info.authors = "Joe Sapp";
info.copyright = "2012-2013 Joe Sapp";
info.translators = Resources.TRANSLATORS;
info.version = _VERSION;
info.website_url = WEBSITE_URL;
info.is_license_wordwrapped = false;
info.license = LICENSE;
info.icons = icon_pixbuf_set;
}
public void activation(bool enabled) {
}
public Spit.Publishing.Publisher create_publisher(
Spit.Publishing.PluginHost host) {
return new Publishing.Gallery3.GalleryPublisher(this, host);
}
public Spit.Publishing.Publisher.MediaType get_supported_media() {
return (Spit.Publishing.Publisher.MediaType.PHOTO |
Spit.Publishing.Publisher.MediaType.VIDEO);
}
}
namespace Publishing.Gallery3 {
private const string SERVICE_NAME = "Gallery3";
private const string SERVICE_WELCOME_MESSAGE =
_("You are not currently logged into your Gallery.\n\nYou must have already signed up for a Gallery3 account to complete the login process.");
private const string DEFAULT_ALBUM_DIR = _("Shotwell");
private const string DEFAULT_ALBUM_TITLE =
_("Shotwell default directory");
private const string REST_PATH = "/index.php/rest";
private class Album {
// Properties
public string name { get; private set; default = ""; }
public string title { get; private set; default = ""; }
public string summary { get; private set; default = ""; }
public string parentname { get; private set; default = ""; }
public string url { get; private set; default = ""; }
public string path { get; private set; default = ""; }
public bool editable { get; private set; default = false; }
// Each element is a collection
public Album(Json.Object collection) {
unowned Json.Object entity =
collection.get_object_member("entity");
title = entity.get_string_member("title");
name = entity.get_string_member("name");
parentname = entity.get_string_member("parent");
url = collection.get_string_member("url");
editable = entity.get_boolean_member("can_edit");
// Get the path from the last two elements of the URL.
// This should always be "/item/#" where "#" is a number.
path = strip_session_url(url);
}
}
private class BaseGalleryTransaction :
Publishing.RESTSupport.Transaction {
protected Json.Parser parser;
// BaseGalleryTransaction constructor
public BaseGalleryTransaction(Session session, string endpoint_url,
string item_path = "",
Publishing.RESTSupport.HttpMethod method =
Publishing.RESTSupport.HttpMethod.POST) {
// TODO: eventually we can remove this
if ((item_path != "") && (item_path[0] != '/')) {
warning("Bad item path, this is a bug!");
error(item_path);
}
base.with_endpoint_url(session,
endpoint_url + REST_PATH + item_path,
method);
this.parser = new Json.Parser();
}
protected unowned Json.Node get_root_node()
throws Spit.Publishing.PublishingError {
string json_object;
unowned Json.Node root_node;
json_object = get_response();
if ((null == json_object) || (0 == json_object.length))
throw new Spit.Publishing.PublishingError.MALFORMED_RESPONSE(
"No response data from %s", get_endpoint_url());
try {
this.parser.load_from_data(json_object);
}
catch (GLib.Error e) {
// If this didn't work, reset the "executed" state
warning("ERROR: didn't load JSON data");
set_is_executed(false);
throw new Spit.Publishing.PublishingError.PROTOCOL_ERROR(e.message);
}
root_node = this.parser.get_root();
if (root_node.is_null())
throw new Spit.Publishing.PublishingError.MALFORMED_RESPONSE(
"Root node is null, doesn't appear to be JSON data");
return root_node;
}
}
private class KeyFetchTransaction : BaseGalleryTransaction {
private string key = "";
// KeyFetchTransaction constructor
//
// url: Base gallery URL
public KeyFetchTransaction(Session session, string url,
string username, string password) {
base(session, url);
add_argument("user", username);
add_argument("password", password);
}
public string get_key() {
if (key != "")
return key;
key = get_response();
// The returned data isn't actually a JSON object...
if (null == key || "" == key || 0 == key.length) {
warning("No response data from \"%s\"", get_endpoint_url());
return "";
}
// Eliminate quotes surrounding key
key = key[1:-1];
return key;
}
}
private class GalleryRequestTransaction : BaseGalleryTransaction {
// GalleryRequestTransaction constructor
//
// item: Item URL component
public GalleryRequestTransaction(Session session, string item,
Publishing.RESTSupport.HttpMethod method =
Publishing.RESTSupport.HttpMethod.GET) {
if (!session.is_authenticated()) {
error("Not authenticated");
}
else {
base(session, session.url, item, method);
add_header("X-Gallery-Request-Key", session.key);
add_header("X-Gallery-Request-Method", "GET");
}
}
}
private class GetAlbumURLsTransaction : GalleryRequestTransaction {
public GetAlbumURLsTransaction(Session session) {
base(session, "/item/1");
add_argument("type", "album");
add_argument("scope", "all");
}
public string [] get_album_urls() {
unowned Json.Node root_node;
unowned Json.Array all_members;
try {
root_node = get_root_node();
}
catch (Spit.Publishing.PublishingError e) {
error("Could not get root node");
}
all_members =
root_node.get_object().get_array_member("members");
string [] member_urls = null;
for (uint i = 0; i <= all_members.get_length() - 1; i++)
member_urls += all_members.get_string_element(i);
return member_urls;
}
}
private class GetAlbumsTransaction : GalleryRequestTransaction {
// Properties
// Original list of album URLs
public string [] album_urls { get; private set; default = null; }
// How many URLs have been sent?
public uint urls_sent { get; private set; default = 0; }
// Are there (possibly) more URLs to send?
public bool more_urls { get; private set; default = false; }
public GetAlbumsTransaction(Session session, string [] _album_urls,
uint start = 0) {
base(session, "/items");
add_argument("scope", "all");
// Save original list of URLs
album_urls = _album_urls;
// Wrap each URL in double quotes and separate by a comma, but
// we should try to keep the length of the URL under 255
// characters. We need to do this to avoid problems with URLs
// that are too long on some web servers (and, really, if there
// are alot of albums, this can get large quickly).
// The Gallery3 API should probably allow this in a POST
// transaction...
string url_list = "[";
string [] my_album_urls = null;
string? endpoint_url = session.get_endpoint_url();
int url_length = (null != endpoint_url) ?
endpoint_url.length : 0;
url_length += 18; // for: ?scope=all&urls=[]
// We have to allow at least one URL at a time
if (start <= album_urls.length - 1) {
urls_sent = start;
do {
my_album_urls += "\"" + album_urls[urls_sent] + "\"";
// Add 3 for: "",
url_length += album_urls[urls_sent].length + 3;
urls_sent++;
} while ((urls_sent <= album_urls.length - 1) &&
(url_length +
album_urls[urls_sent].length + 3 <= 255));
url_list += string.joinv(",", my_album_urls);
more_urls = (urls_sent <= (album_urls.length - 1));
}
url_list += "]";
add_argument("urls", url_list);
}
public Album [] get_albums()
throws Spit.Publishing.PublishingError {
Album [] albums = null;
Album tmp_album;
unowned Json.Node root_node = get_root_node();
unowned Json.Array members = root_node.get_array();
// Only add editable items
for (uint i = 0; i <= members.get_length() - 1; i++) {
tmp_album = new Album(members.get_object_element(i));
if (tmp_album.editable)
albums += tmp_album;
else
warning(@"Album \"$(tmp_album.title)\" is not editable");
}
return albums;
}
}
// Class to create or get a tag URL.
// Tag URLs are placed in the "item_tags" object and relate an item and
// its tags.
private class GalleryGetTagTransaction : BaseGalleryTransaction {
public GalleryGetTagTransaction(Session session, string tag_name) {
if (!session.is_authenticated()) {
error("Not authenticated");
}
else {
Json.Generator entity = new Json.Generator();
Json.Node root_node = new Json.Node(Json.NodeType.OBJECT);
Json.Object obj = new Json.Object();
base(session, session.url,
"/tags",
Publishing.RESTSupport.HttpMethod.POST);
add_header("X-Gallery-Request-Key", session.key);
add_header("X-Gallery-Request-Method", "POST");
obj.set_string_member("name", tag_name);
root_node.set_object(obj);
entity.set_root(root_node);
size_t entity_length;
string entity_value = entity.to_data(out entity_length);
debug("created entity: %s", entity_value);
add_argument("entity", entity_value);
}
}
public string tag_url() {
unowned Json.Node root_node;
string url;
try {
root_node = get_root_node();
}
catch (Spit.Publishing.PublishingError e) {
error("Could not get root node");
}
url =
root_node.get_object().get_string_member("url");
return url;
}
}
// Get the item_tags URL for a given item
private class GalleryGetItemTagsURLsTransaction :
GalleryRequestTransaction {
private string item_tags_path = "";
public GalleryGetItemTagsURLsTransaction(Session session,
string item_url) {
base(session, item_url);
}
public string get_item_tags_path() {
unowned Json.Node root_node;
unowned Json.Object relationships, tags;
if ("" == item_tags_path) {
try {
root_node = get_root_node();
}
catch (Spit.Publishing.PublishingError e) {
error("Could not get root node");
}
relationships =
root_node.get_object().get_object_member("relationships");
tags = relationships.get_object_member("tags");
item_tags_path = tags.get_string_member("url");
// Remove the session URL from the beginning of this URL
item_tags_path = strip_session_url(item_tags_path);
}
return item_tags_path;
}
}
// Set a tag relationship with an item
private class GallerySetTagRelationshipTransaction :
BaseGalleryTransaction {
public GallerySetTagRelationshipTransaction(Session session,
string item_tags_path, string tag_url, string item_url) {
if (!session.is_authenticated()) {
error("Not authenticated");
}
else {
Json.Generator entity = new Json.Generator();
Json.Node root_node = new Json.Node(Json.NodeType.OBJECT);
Json.Object obj = new Json.Object();
base(session, session.url,
item_tags_path,
Publishing.RESTSupport.HttpMethod.POST);
add_header("X-Gallery-Request-Key", session.key);
add_header("X-Gallery-Request-Method", "POST");
obj.set_string_member("tag", tag_url);
obj.set_string_member("item", item_url);
root_node.set_object(obj);
entity.set_root(root_node);
size_t entity_length;
string entity_value = entity.to_data(out entity_length);
debug("created entity: %s", entity_value);
add_argument("entity", entity_value);
}
}
}
private class GalleryAlbumCreateTransaction : BaseGalleryTransaction {
// Properties
public PublishingParameters parameters { get; private set; }
// Private variables
private string? session_url;
// GalleryAlbumCreateTransaction constructor
//
// parameters: New album parameters
public GalleryAlbumCreateTransaction(Session session,
PublishingParameters parameters) {
if (!session.is_authenticated()) {
error("Not authenticated");
}
else {
Json.Generator entity = new Json.Generator();
Json.Node root_node = new Json.Node(Json.NodeType.OBJECT);
Json.Object obj = new Json.Object();
base(session, session.url, "/item/1",
Publishing.RESTSupport.HttpMethod.POST);
add_header("X-Gallery-Request-Key", session.key);
add_header("X-Gallery-Request-Method", "POST");
this.session_url = session.url;
this.parameters = parameters;
obj.set_string_member("name", parameters.album_name);
obj.set_string_member("type", "album");
obj.set_string_member("title", parameters.album_title);
root_node.set_object(obj);
entity.set_root(root_node);
string entity_value = entity.to_data(null);
debug("created entity: %s", entity_value);
add_argument("entity", entity_value);
}
}
public string get_new_album_path() {
unowned Json.Node root_node;
string new_path;
try {
root_node = get_root_node();
}
catch (Spit.Publishing.PublishingError e) {
error("Could not get root node");
}
new_path =
root_node.get_object().get_string_member("url");
new_path = strip_session_url(new_path);
return new_path;
}
}
private class GalleryUploadTransaction :
Publishing.RESTSupport.UploadTransaction {
private Session session;
private Json.Generator generator;
private PublishingParameters parameters;
private string item_url;
private string item_path;
private string item_tags_path;
public GalleryUploadTransaction(Session session,
PublishingParameters parameters,
Spit.Publishing.Publishable publishable) {
// TODO: eventually we can remove this
if (parameters.album_path[0] != '/') {
warning("Bad upload item path, this is a bug!");
error(parameters.album_path);
}
base.with_endpoint_url(session, publishable,
session.url + REST_PATH + parameters.album_path);
this.parameters = parameters;
this.session = session;
add_header("X-Gallery-Request-Key", session.key);
add_header("X-Gallery-Request-Method", "POST");
GLib.HashTable<string, string> disposition_table =
new GLib.HashTable<string, string>(GLib.str_hash,
GLib.str_equal);
string? title = publishable.get_publishing_name();
string filename = publishable.get_param_string(
Spit.Publishing.Publishable.PARAM_STRING_BASENAME);
if (title == null || title == "")
//TODO: remove extension?
title = filename;
disposition_table.insert("filename", @"$(filename)");
disposition_table.insert("name", "file");
set_binary_disposition_table(disposition_table);
// Do the JSON stuff
generator = new Json.Generator();
string desc = publishable.get_param_string(
Spit.Publishing.Publishable.PARAM_STRING_COMMENT);
string type = (publishable.get_media_type() ==
Spit.Publishing.Publisher.MediaType.VIDEO) ?
"movie" : "photo";
Json.Node root_node = new Json.Node(Json.NodeType.OBJECT);
Json.Object obj = new Json.Object();
obj.set_string_member("name", filename);
obj.set_string_member("type", type);
obj.set_string_member("title", title);
obj.set_string_member("description", desc);
root_node.set_object(obj);
generator.set_root(root_node);
add_argument("entity", generator.to_data(null));
}
private string get_new_item_url() {
string json_object;
string new_url;
unowned Json.Node root_node;
Json.Parser parser = new Json.Parser();
json_object = get_response();
if ((null == json_object) || (0 == json_object.length)) {
warning("No response data from %s", get_endpoint_url());
return "";
}
debug("json_object: %s", json_object);
try {
parser.load_from_data(json_object);
}
catch (GLib.Error e) {
// If this didn't work, reset the "executed" state
// TODO: can we recover from this?
warning("ERROR: didn't load JSON data");
set_is_executed(false);
error(e.message);
}
root_node = parser.get_root();
if (root_node.is_null()) {
warning("Root node is null, doesn't appear to be JSON data");
return "";
}
new_url =
root_node.get_object().get_string_member("url");
return new_url;
}
private void do_set_tag_relationship(string tag_url)
throws Spit.Publishing.PublishingError {
GallerySetTagRelationshipTransaction tag_txn =
new GallerySetTagRelationshipTransaction(
(Session) get_parent_session(), item_tags_path,
tag_url, item_url);
tag_txn.execute();
debug("Response from setting tag relationship: %s",
tag_txn.get_response());
}
private string get_new_item_tags_path() {
GalleryGetItemTagsURLsTransaction tag_urls_txn =
new GalleryGetItemTagsURLsTransaction(
(Session) get_parent_session(), item_path);
try {
tag_urls_txn.execute();
} catch (Spit.Publishing.PublishingError err) {
debug("Problem getting the item_tags URL: %s",
err.message);
return "";
}
return tag_urls_txn.get_item_tags_path();
}
private string get_tag_url(string tag) {
GalleryGetTagTransaction tag_txn =
new GalleryGetTagTransaction(
(Session) get_parent_session(), tag);
try {
tag_txn.execute();
} catch (Spit.Publishing.PublishingError err) {
debug("Problem getting the tags URL: %s",
err.message);
return "";
}
return tag_txn.tag_url();
}
private void on_upload_completed()
throws Spit.Publishing.PublishingError {
debug("EVENT: upload completed");
if (!parameters.strip_metadata) {
string[] keywords;
debug("EVENT: evaluating tags");
keywords = base.publishable.get_publishing_keywords();
// If this publishable has no tags, continue
if (null == keywords) {
debug("No tags");
return;
}
// Get URLs from the file we just finished uploading
item_url = get_new_item_url();
item_path = strip_session_url(item_url);
item_tags_path = get_new_item_tags_path();
debug("new item path is %s", item_path);
debug("item_tags path is %s", item_tags_path);
// Verify these aren't empty
if (("" == item_path) || ("" == item_tags_path)) {
throw new
Spit.Publishing.PublishingError.COMMUNICATION_FAILED(
"Could not obtain URL of uploaded item or its " +
"\"item_tags\" relationship URL");
}
// Do the tagging here
foreach (string tag in keywords) {
debug(@"Found tag: $(tag)");
string new_tag_url = get_tag_url(tag);
try {
do_set_tag_relationship(new_tag_url);
} catch (Spit.Publishing.PublishingError err) {
debug("Problem setting the relationship between tag " +
"and item: %s", err.message);
throw err;
}
}
}
}
public override void execute()
throws Spit.Publishing.PublishingError {
base.execute();
// Run tagging operations here
on_upload_completed();
}
}
public class GalleryPublisher : Spit.Publishing.Publisher, GLib.Object {
private const string BAD_FILE_MSG = _("\n\nThe file \"%s\" may not be supported by or may be too large for this instance of Gallery3.");
private const string BAD_MOVIE_MSG = _("\nNote that Gallery3 only supports the video types that Flowplayer does.");
private weak Spit.Publishing.PluginHost host = null;
private Spit.Publishing.ProgressCallback progress_reporter = null;
private weak Spit.Publishing.Service service = null;
private Session session = null;
private bool running = false;
private Album[] albums = null;
private string key = null;
private PublishingOptionsPane publishing_options_pane = null;
public GalleryPublisher(Spit.Publishing.Service service,
Spit.Publishing.PluginHost host) {
this.service = service;
this.host = host;
this.session = new Session();
}
public bool is_running() {
return running;
}
public Spit.Publishing.Service get_service() {
return service;
}
public void start() {
if (is_running())
return;
if (host == null)
error("GalleryPublisher: start( ): can't start; this " +
"publisher is not restartable.");
debug("GalleryPublisher: starting interaction.");
running = true;
key = get_api_key();
if ((null == key) || ("" == key))
do_show_service_welcome_pane();
else {
string url = get_gallery_url();
string username = get_gallery_username();
if ((null == username) || (null == key) || (null == url))
do_show_service_welcome_pane();
else {
debug("ACTION: attempting network login for user " +
"'%s' at URL '%s' from saved credentials.",
username, url);
host.install_account_fetch_wait_pane();
session.authenticate(url, username, key);
// Initiate an album transaction
do_fetch_album_urls();
}
}
}
public void stop() {
debug("GalleryPublisher: stop( ) invoked.");
running = false;
}
// Config getters/setters
// API key
internal string? get_api_key() {
return host.get_config_string("api-key", null);
}
internal void set_api_key(string key) {
host.set_config_string("api-key", key);
}
// URL
internal string? get_gallery_url() {
return host.get_config_string("url", null);
}
internal void set_gallery_url(string url) {
host.set_config_string("url", url);
}
// Username
internal string? get_gallery_username() {
return host.get_config_string("username", null);
}
internal void set_gallery_username(string username) {
host.set_config_string("username", username);
}
internal bool? get_persistent_strip_metadata() {
return host.get_config_bool("strip-metadata", false);
}
internal void set_persistent_strip_metadata(bool strip_metadata) {
host.set_config_bool("strip-metadata", strip_metadata);
}
internal int? get_scaling_constraint_id() {
return host.get_config_int("scaling-constraint-id", 0);
}
internal void set_scaling_constraint_id(int constraint) {
host.set_config_int("scaling-constraint-id", constraint);
}
internal int? get_scaling_pixels() {
return host.get_config_int("scaling-pixels", 1024);
}
internal void set_scaling_pixels(int pixels) {
host.set_config_int("scaling-pixels", pixels);
}
// Pane installation functions
private void do_show_service_welcome_pane() {
debug("ACTION: showing service welcome pane.");
host.install_welcome_pane(SERVICE_WELCOME_MESSAGE,
on_service_welcome_login);
}
private void do_show_credentials_pane(CredentialsPane.Mode mode) {
debug("ACTION: showing credentials capture pane in %s mode.",
mode.to_string());
session.deauthenticate();
CredentialsPane creds_pane =
new CredentialsPane(host, mode, get_gallery_url(),
get_gallery_username(), get_api_key());
creds_pane.go_back.connect(on_credentials_go_back);
creds_pane.login.connect(on_credentials_login);
host.install_dialog_pane(creds_pane);
}
private void do_network_login(string url, string username,
string password) {
debug("ACTION: attempting network login for user '%s' at URL " +
"'%s'.", username, url);
host.install_login_wait_pane();
KeyFetchTransaction fetch_trans =
new KeyFetchTransaction(session, url, username, password);
fetch_trans.network_error.connect(on_key_fetch_error);
fetch_trans.completed.connect(on_key_fetch_complete);
try {
fetch_trans.execute();
} catch (Spit.Publishing.PublishingError err) {
debug("Caught an error attempting to login");
// 403 errors may be recoverable, so don't post the error to
// our host immediately; instead, try to recover from it
on_key_fetch_error(fetch_trans, err);
}
}
private void do_fetch_album_urls() {
host.install_account_fetch_wait_pane();
GetAlbumURLsTransaction album_trans =
new GetAlbumURLsTransaction(session);
album_trans.network_error.connect(on_album_urls_fetch_error);
album_trans.completed.connect(on_album_urls_fetch_complete);
try {
album_trans.execute();
} catch (Spit.Publishing.PublishingError err) {
debug("Caught an error attempting to fetch albums");
// 403 errors may be recoverable, so don't post the error to
// our host immediately; instead, try to recover from it
on_album_urls_fetch_error(album_trans, err);
}
}
private void do_fetch_albums(string [] album_urls, uint start = 0) {