harbour-wallaread/qml/js/WallaBase.js

853 lines
25 KiB
JavaScript

/*
* WallaRead - A Wallabag 2+ client for SailfishOS
* © 2016 Grégory Oestreicher <greg@kamago.net>
*
* This file is part of WallaRead.
*
* WallaRead is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* WallaRead 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with WallaRead. If not, see <http://www.gnu.org/licenses/>.
*
*/
.pragma library
.import QtQuick.LocalStorage 2.0 as Storage
/*
Exposed variable
*/
var ArticlesFilter = {
All: 1,
Read: 2,
Starred: 4
}
/*
Timer management, used for the various setTimeout() calls
*/
var _timerSource = null;
function setTimerSource( source )
{
_timerSource = source;
}
/*
Used to embed images in the articles
*/
var _imageEmbedder = null;
function setImageEmbedder( embedder )
{
_imageEmbedder = embedder;
}
/*
Servers management
*/
function getServers( cb )
{
var db = getDatabase();
db.readTransaction(
function( tx ) {
var servers = new Array;
var err = null;
try {
var res = tx.executeSql( "SELECT id, name FROM servers ORDER BY NAME" );
for ( var i = 0; i < res.rows.length; ++i ) {
var current = res.rows.item( i );
var server = { id: current.id, name: current.name, unread: 0 };
var countRes = tx.executeSql( "SELECT COUNT(*) as count FROM articles WHERE server=? AND archived=0", [ current.id ] );
server.unread = countRes.rows[0].count;
servers.push( server );
}
}
catch( e ) {
err = e.message;
}
cb( servers, err );
}
);
}
function getServer( id, cb )
{
var err = null;
var db = getDatabase();
db.readTransaction(
function( tx ) {
var server = null;
try {
var res = tx.executeSql( "SELECT id, name, url, lastSync FROM servers WHERE id=?", [ id ] );
if ( res.rows.length === 0 ) {
err = "No server with this ID found";
}
else {
server = res.rows.item( 0 );
}
}
catch( e ) {
err = e.message;
}
cb( server, err );
}
);
}
function getServerSettings( id, cb )
{
var err = null;
var db = getDatabase();
db.readTransaction(
function( tx ) {
var server = null;
try {
var res = tx.executeSql( "SELECT * FROM servers WHERE id=?", [ id ] );
if ( res.rows.length === 0 ) {
err = "No server with this ID found";
}
else {
server = res.rows.item( 0 );
}
}
catch( e ) {
err = e.message;
}
cb( server, err );
}
);
}
function addNewServer( props )
{
var db = getDatabase();
db.transaction(
function( tx ) {
// TODO: try/catch here when error management is in place in the UI
tx.executeSql( "INSERT INTO servers(name, url, user, password, clientId, clientSecret) VALUES(?, ?, ?, ?, ?, ?)",
[
props.name,
props.url,
props.user,
props.password,
props.clientId,
props.clientSecret
]
);
}
);
}
function updateServer( id, props )
{
var db = getDatabase();
db.transaction(
function( tx ) {
// TODO: try/catch here when error management is in place in the UI
tx.executeSql( "UPDATE servers SET " +
"name=?, " +
"url=?, " +
"user=?, " +
"password=?, " +
"clientId=?, " +
"clientSecret=? " +
"WHERE id=?",
[
props.name,
props.url,
props.user,
props.password,
props.clientId,
props.clientSecret,
id
]
);
}
);
}
function deleteServer( id )
{
var db = getDatabase();
db.transaction(
function( tx ) {
console.debug( "Deleting server " + id );
// TODO: try/catch here when error management is in place in the UI
tx.executeSql( "DELETE FROM articles WHERE server=?", [ id ] );
tx.executeSql( "DELETE FROM servers WHERE id=?", [ id ] );
}
);
}
function setServerLastSync( id, last )
{
var db = getDatabase();
db.transaction(
function( tx ) {
tx.executeSql( "UPDATE servers SET lastSync=? WHERE id=?", [ last, id ] );
}
)
}
function connectToServer( id, cb )
{
var db = getDatabase();
db.readTransaction(
function( tx ) {
var err = null;
try {
var res = tx.executeSql( "SELECT url, user, password, clientId, clientSecret FROM servers WHERE id=?", [ id ] );
if ( res.rows.length === 0 ) {
err = "No server with ID " + id + " found";
}
else {
_sendAuthRequest( res.rows.item( 0 ), cb );
}
}
catch( e ) {
err = e.message;
}
if ( err !== null )
cb( null, err );
}
);
}
function _sendAuthRequest( props, cb )
{
var url = props.url;
if ( url.charAt( url.length - 1 ) !== "/" )
url += "/";
url += "oauth/v2/token";
console.debug( "Sending auth request to " + url );
var http = new XMLHttpRequest();
var params = "grant_type=password";
params += "&username=" + escape( props.user );
params += "&password=" + escape( props.password );
params += "&client_id=" + escape( props.clientId );
params += "&client_secret=" + escape( props.clientSecret );
http.onreadystatechange = function() {
if ( http.readyState === XMLHttpRequest.DONE ) {
console.debug( "Auth request response status is " + http.status );
var json = null;
var err = null;
if ( http.status === 200 ) {
try {
json = JSON.parse( http.responseText )
}
catch( e ) {
json = null;
err = "Failed to parse server response: " + e.message
}
}
else {
if ( http.responseText.length ) {
try {
json = JSON.parse( http.responseText )
}
catch( e ) {
json = http.responseText
}
}
err = "HTTP request failed: " + http.status;
}
cb( json, err );
}
};
http.open( "POST", url, true );
http.setRequestHeader( "Content-type", "application/x-www-form-urlencoded" );
http.setRequestHeader( "Content-length", params.length );
http.setRequestHeader( "Connection", "close" );
http.send( params );
}
/*
Articles management
*/
function syncDeletedArticles( props, cb )
{
var db = getDatabase();
db.readTransaction(
function( tx ) {
var res = tx.executeSql( "SELECT id, url FROM articles WHERE server=?", [ props.id ] );
var articles = new Array;
for ( var i = 0; i < res.rows.length; ++i ) {
articles.push( res.rows[i] );
}
var working = false;
function processArticlesList() {
if ( !working && articles.length === 0 ) {
cb();
}
else {
if ( !working )
_timerSource.setTimeout( _checkNextArticle, 100 );
_timerSource.setTimeout( processArticlesList, 500 );
}
}
function _checkNextArticle() {
working = true;
var article = articles.pop();
var url = props.url;
if ( url.charAt( url.length - 1 ) !== "/" )
url += "/";
url += "api/entries/exists.json";
var params = "url=";
params += encodeURIComponent( article.url );
url += "?" + params;
var http = new XMLHttpRequest;
http.onreadystatechange = function() {
if ( http.readyState === XMLHttpRequest.DONE ) {
console.debug( "Checking if article " + article.id + " exists, response status is " + http.status );
var json = null;
if ( http.status === 200 ) {
try {
json = JSON.parse( http.responseText )
}
catch( e ) {
json = null;
}
if ( !json.exists ) {
console.debug( "Article " + article.id + " has been deleted" );
deleteArticle( props.id, article.id );
}
}
// In case of error let's assume that the article exists
working = false;
}
};
http.open( "GET", url, true );
http.setRequestHeader( "Authorization:", "Bearer " + props.token );
http.setRequestHeader( "Accept", "application/json" );
http.setRequestHeader( "Connection", "close" );
http.send();
}
_timerSource.setTimeout( processArticlesList, 500 );
}
);
}
function getArticles( serverId, cb, filter )
{
var db = getDatabase();
db.readTransaction(
function( tx ) {
var articles = new Array
var err = null;
var where = "";
if ( filter & ArticlesFilter.Read )
where += " AND archived=1";
else
where += " AND archived=0";
if ( filter & ArticlesFilter.Starred )
where += " AND starred=1";
try {
var res = tx.executeSql( "SELECT * FROM articles WHERE server=?" + where, [ serverId ] );
for ( var i = 0; i < res.rows.length; ++i ) {
articles.push( res.rows[i] );
}
}
catch( e ) {
}
cb( articles, err );
}
);
}
function articleExists( server, id, cb )
{
var db = getDatabase();
db.readTransaction(
function( tx ) {
var exists = false;
var err = null;
try {
var res = tx.executeSql( "SELECT COUNT(*) AS count FROM articles WHERE id=? AND server=?", [ id, server ] );
if ( res.rows.length === 1 ) {
exists = ( res.rows[0].count === 0 ? false : true );
}
else {
err = "Failed to get article from database when checking its existence";
}
}
catch( e ) {
err = e.message;
}
cb( exists, err );
}
);
}
function saveArticle( props )
{
articleExists(
props.server,
props.id,
function( exists, err ) {
if ( err !== null ) {
// TODO: if a callback is used to notify the caller of an error
// then in Server.qml the articles will have to be reported individually
// through a signal / slot mechanism
}
else {
if ( exists )
_updateArticle( props );
else
_insertArticle( props );
}
}
);
}
function _insertArticle( props )
{
var db = getDatabase();
db.transaction(
function( tx ) {
tx.executeSql(
"INSERT INTO articles(id,server,created,updated,mimetype,language,readingTime,url,domain,archived,starred,title,content) VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?)",
[
props.id,
props.server,
props.created,
props.updated,
props.mimetype,
props.language,
props.readingTime,
props.url,
props.domain,
props.archived,
props.starred,
props.title,
props.content
]
);
}
);
}
function _updateArticle( props )
{
var db = getDatabase();
db.transaction(
function( tx ) {
tx.executeSql(
"UPDATE articles SET created=?, updated=?, mimetype=?, language=?, readingTime=?, url=?, domain=?, archived=?, starred=?, title=?, content=? WHERE id=? AND server=?",
[
props.created,
props.updated,
props.mimetype,
props.language,
props.readingTime,
props.url,
props.domain,
props.archived,
props.starred,
props.title,
props.content,
props.id,
props.server
]
);
}
);
}
function deleteArticle( server, id )
{
var db = getDatabase();
db.transaction(
function( tx ) {
console.debug( "Delete article " + id + " from database" );
tx.executeSql( "DELETE FROM articles WHERE id=? AND server=?", [ id, server ] );
}
);
}
function downloadArticles( props, cb )
{
var url = props.url;
if ( url.charAt( url.length - 1 ) !== "/" )
url += "/";
url += "api/entries.json";
url += "?since=" + props.since;
url += "&perPage=10";
var articles = new Array;
_downloadNextArticles(
url,
props.accessToken,
1,
function( arts, done, err ) {
if ( err !== null ) {
cb( null, err )
}
else {
if ( arts.length )
articles.push.apply( articles, arts );
if ( done )
embedImages( articles, cb );
}
}
);
}
function _downloadNextArticles( url, token, page, cb )
{
var pageUrl = url;
pageUrl += "&page=" + page;
console.debug( "Getting articles at " + pageUrl );
var http = new XMLHttpRequest();
http.onreadystatechange = function() {
if ( http.readyState === XMLHttpRequest.DONE ) {
console.debug( "Articles download status code is " + http.status )
var json = null;
var articles = null;
var done = true;
var err = null;
if ( http.status === 200 ) {
try {
json = JSON.parse( http.responseText )
articles = json._embedded.items;
if ( page < json.pages )
done = false;
}
catch( e ) {
json = null;
err = "Failed to parse server response: " + e.message
}
}
else {
if ( http.responseText.length ) {
try {
articles = JSON.parse( http.responseText )
}
catch( e ) {
articles = http.responseText
}
}
err = "HTTP request failed: " + http.status;
}
cb( articles, done, err );
if ( !done )
_downloadNextArticles( url, token, page+1, cb );
}
}
http.open( "GET", pageUrl, true );
http.setRequestHeader( "Authorization:", "Bearer " + token );
http.setRequestHeader( "Accept", "application/json" );
http.setRequestHeader( "Connection", "close" );
http.send();
}
function embedImages( articles, cb )
{
var ret = new Array;
var working = false;
function _processArticlesList() {
if ( !working && articles.length === 0 ) {
cb( ret, null );
}
else {
if ( !working )
_timerSource.setTimeout( _processNextArticle, 100 );
_timerSource.setTimeout( _processArticlesList, 500 );
}
}
function _processNextArticle() {
working = true;
var article = articles.pop();
console.debug( "Embedding images for article " + article.id );
console.debug( "Length is " + article.content.length + " before" );
_embedImages(
article,
function( content ) {
article.content = content;
console.debug( "Length is " + article.content.length + " after" );
ret.push( article );
working = false;
}
);
}
_timerSource.setTimeout( _processArticlesList, 100 );
}
function _embedImages( article, cb )
{
var imgRe = /<img[^>]+\bsrc=(["'])(https?:\/\/.+?)\1[^>]+>/g;
var match;
var targets = new Array;
var content = article.content;
while ( match = imgRe.exec( content ) ) {
targets.push(
{
start: content.indexOf( match[2], match.index ),
url: match[2]
}
)
}
var working = false;
var offset = 0;
function _processImagesList() {
if ( !working && targets.length === 0 ) {
cb( content );
}
else {
if ( !working )
_timerSource.setTimeout( _downloadNextImage, 100 );
_timerSource.setTimeout( _processImagesList, 500 );
}
}
function _downloadNextImage() {
working = true;
var target = targets.pop();
console.debug( "Downloading image at " + target.url );
_imageEmbedder.embed(
target.url,
function( type, binary, err ) {
if ( err !== null ) {
// No big deal, we'll just leave an external src for this
// image.
console.error( "Failed to download image at " + target.url + ": " + err );
}
else if ( type.length && type.substr( 0, 6 ) === "image/" && binary.length ) {
console.debug( "Downloaded image at " + target.url + " with type " + type + ", size is " + binary.length );
var replacement = "data:" + type + ";base64," + binary;
var pre = content.substr( 0, target.start + offset );
var post = content.substr( target.start + offset - target.url.length );
content = pre + replacement + post;
offset += replacement.length - target.url.length;
}
working = false;
}
);
}
_timerSource.setTimeout( _processImagesList, 100 );
}
function setArticleStar( server, id, star )
{
var db = getDatabase();
db.transaction(
function( tx ) {
tx.executeSql( "UPDATE articles SET starred=? WHERE id=? AND server=?", [ star, id, server ] );
}
);
}
function setArticleRead( server, id, read )
{
var db = getDatabase();
db.transaction(
function( tx ) {
tx.executeSql( "UPDATE articles SET archived=? WHERE id=? AND server=?", [ read, id, server ] );
}
);
}
/*
Internal functions
*/
var DBVERSION = "0.3"
var _db = null;
function getDatabase()
{
if ( _db === null ) {
console.debug( "Opening new connection to the database" );
_db = Storage.LocalStorage.openDatabaseSync( "WallaRead", "", "WallaRead", 100000000 );
checkDatabaseStatus( _db );
}
return _db;
}
function checkDatabaseStatus( db )
{
if ( db.version === "" ) {
createLatestDatabase( db );
}
else if ( db.version === "0.2" ) {
_updateSchema_v3( db );
}
}
function createLatestDatabase( db )
{
var version = db.version;
if ( version !== DBVERSION ) {
db.transaction(
function( tx ) {
tx.executeSql( "CREATE TABLE IF NOT EXISTS servers (" +
"id INTEGER PRIMARY KEY AUTOINCREMENT, " +
"name TEXT NOT NULL, " +
"url TEXT NOT NULL, " +
"user TEXT NOT NULL, " +
"password TEXT NOT NULL, " +
"clientId TEXT NOT NULL, " +
"clientSecret TEXT NOT NULL, " +
"lastSync INTEGER DEFAULT 0" +
")"
);
tx.executeSql(
"CREATE TABLE IF NOT EXISTS articles (" +
"id INTEGER, " +
"server INTEGER REFERENCES servers(id), " +
"created TEXT, " +
"updated TEXT, " +
"mimetype TEXT, " +
"language TEXT, " +
"readingTime INTEGER DEFAULT 0, " +
"url TEXT, " +
"domain TEXT, " +
"archived INTEGER DEFAULT 0, " +
"starred INTEGER DEFAULT 0, " +
"title TEXT, " +
"previewPicture BLOB, " +
"content TEXT, " +
"PRIMARY KEY(id, server)" +
")"
);
db.changeVersion( version, DBVERSION );
}
);
}
}
function resetDatabase()
{
var db = getDatabase();
var version = db.version;
db.transaction(
function( tx ) {
tx.executeSql( "DROP TABLE IF EXISTS servers" );
tx.executeSql( "DROP TABLE IF EXISTS articles" );
db.changeVersion( version, "" );
createLatestDatabase( db );
}
);
}
function _updateSchema_v3( db )
{
db.transaction(
function( tx ) {
tx.executeSql(
"CREATE TABLE IF NOT EXISTS articles_next (" +
"id INTEGER, " +
"server INTEGER REFERENCES servers(id), " +
"created TEXT, " +
"updated TEXT, " +
"mimetype TEXT, " +
"language TEXT, " +
"readingTime INTEGER DEFAULT 0, " +
"url TEXT, " +
"domain TEXT, " +
"archived INTEGER DEFAULT 0, " +
"starred INTEGER DEFAULT 0, " +
"title TEXT, " +
"previewPicture BLOB, " +
"content TEXT, " +
"PRIMARY KEY(id, server)" +
")"
);
tx.executeSql( "INSERT INTO articles_next SELECT * FROM articles" );
tx.executeSql( "DROP TABLE articles" );
tx.executeSql( "ALTER TABLE articles_next RENAME TO articles" );
},
function() {
},
function() {
db.changeVersion( version, "0.3" );
}
);
}