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srv.inventory.js
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srv.inventory.js
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/**
* @ngdoc service
* @name inventoryService
*
* @module flynnBookScannerApp
*
* @description
* Provides access to the book inventory. Used PouchDB as backend.
*/
app.service('inventoryService', function ($rootScope, $http, $q, settingsService, base64, $log) {
'use strict';
var config = settingsService.load(),
activeProfile = config.activeProfile();
function getDB() {
var NAME_OF_POUCHDB;
config = settingsService.load();
NAME_OF_POUCHDB = activeProfile.dbName;
var db;
if (!db) {
if (typeof cordova != 'undefined') {
if (cordova.platformId === 'android') {
// for performance use indexedDB on Android
db = new PouchDB(NAME_OF_POUCHDB, {adapter: 'idb', size: 500});
} else {
// default use websql
db = new PouchDB(NAME_OF_POUCHDB, {adapter: 'websql', location: 'default', size: 500});
}
} else {
// default use websql
db = new PouchDB(NAME_OF_POUCHDB, {adapter: 'websql'});
}
}
return db;
}
function updateIndex(pDB, cb) {
if (pDB) {
// update index
pDB.createIndex({
index: {
fields: ['value.id']
}
}).then(function (result) {
$log.trace('Creating index was successfull: ', result);
if (cb) {
cb();
}
}).catch(function (err) {
$log.err('Creating index was not successfull: ', err);
if (cb) {
cb();
}
});
} else {
if (cb) {
cb();
}
}
}
return {
updateIndex: function () {
updateIndex(getDB());
},
syncRemote: function (reportNetworkError) {
var deferred = $q.defer();
// reload config
config = settingsService.load();
activeProfile = config.activeProfile();
// Add authentication data
var couchDbUrl = activeProfile.couchdb,
localDB = getDB();
if (localDB) {
if (activeProfile.user && activeProfile.password) {
var basicAuth = encodeURIComponent(activeProfile.user) + ':' + encodeURIComponent(activeProfile.password),
remoteCouch = couchDbUrl.replace('://', '://' + basicAuth + '@');
$log.info('Syncing with couchDB started: ' + couchDbUrl);
// check for network availability first and login
$http({
method: 'GET',
url: remoteCouch,
timeout: config.appConfig.timeout
}).then(function () {
localDB.sync(remoteCouch, config.appConfig.sync || {
live: false,
retry: true
}).on('change', function (info) {
$rootScope.$apply(function () {
$log.info('Updating documents with remote changes...');
$log.debug('Updating documents with remote changes with following answer: ', info);
updateIndex(localDB);
});
}).on('complete', function (info) {
$rootScope.$apply(function () {
$log.info('Completed sync.');
$log.debug('Completed sync with following answer: ', info);
deferred.resolve(info);
});
}).on('uptodate', function (info) {
$rootScope.$apply(function () {
$log.info('Already up-to-date.');
$log.debug('Already up-to-date with following answer: ', info);
deferred.resolve(info);
});
}).on('error', function (err) {
$rootScope.$apply(function () {
$log.error('Error during remote sync with following answer: ', err);
if (err.stats === 400) {
$log.info('Seems be a remote server error.');
}
deferred.reject(err);
});
}).catch(function (err) {
$rootScope.$apply(function () {
$log.error('Unknown error during remote sync.', err);
deferred.resolve(err);
});
});
}, function (err) {
if (err.status === 0) {
$log.info('Seems to run in offline mode.');
if (reportNetworkError) {
deferred.reject(err);
} else {
deferred.resolve(err);
}
} else {
if (err.status === 401) {
$log.info('Seems to use invalid login data.');
deferred.reject(err);
}
$log.error('Unkown error during connection check: ' + JSON.stringify(err));
deferred.resolve(err);
}
});
} else {
var response = {};
response.status = 401;
deferred.reject(response);
}
return deferred.promise;
}
},
getBook: function (pBookID) {
var deferred = $q.defer(),
bookDB = getDB();
$log.debug('Starting search for book: ' + pBookID);
if (bookDB) {
bookDB.find({
selector: {
'value.id': {
$eq: pBookID
}
}
}).then(function (result) {
$log.debug('Search successfull.');
$rootScope.$apply(function () {
if (result.docs.length > 0) {
deferred.resolve({
book: result.docs[0]
});
} else {
deferred.resolve();
}
});
}).catch(function (err) {
$log.error('Error searching for book ' + pBookID + ' :' + err);
deferred.reject(err);
});
} else {
$log.error('Error during db connection');
deferred.reject({});
}
return deferred.promise;
},
read: function () {
var deferred = $q.defer(),
response = {},
bookDB = getDB();
if (bookDB) {
$log.debug('Using db-adapter: ' + bookDB.adapter);
bookDB.allDocs({
include_docs: true,
attachments: true
}, function (err, doc) {
$rootScope.$apply(function () {
if (!err) {
var books,
rows = doc.rows;
if (rows && rows.length > 0) {
books = [];
for (var id in rows) {
var bookEntry = rows[id].doc;
// only add complete entries to results
if (bookEntry.value && bookEntry.value.volumeInfo) {
if (bookEntry._attachments) {
var attachment = bookEntry._attachments['thumbnail_' + bookEntry.value.id];
if (attachment) {
bookEntry.image = {};
bookEntry.image.content_type = attachment.content_type;
bookEntry.image.data = attachment.data;
bookEntry.image.id = 'thumbnail_' + bookEntry.value.id;
}
var ebook = bookEntry._attachments['ebook_' + bookEntry.value.id];
if (ebook) {
bookEntry.ebook = {};
bookEntry.ebook.filename = 'ebook_' + bookEntry.value.id;
bookEntry.ebook.content_type = ebook.content_type;
bookEntry.ebook.data = ebook.data;
}
}
bookEntry._attachments = null;
$log.debug('Read following valid book entry: ' + bookEntry.value.volumeInfo.title);
books.push(bookEntry);
}
}
}
if (books) {
response.books = books;
$log.debug('Found ' + books.length + ' books in inventory.');
}
deferred.resolve(response);
} else {
$log.error('Reading from local db not working: ' + JSON.stringify(err));
deferred.reject(response);
}
});
});
} else {
deferred.reject(response);
}
return deferred.promise;
},
searchISBN: function (pBooks, pISBN) {
if (pBooks && pBooks.length > 0) {
var response = {};
response.books = {};
response.count = 0;
for (var id in pBooks) {
var bookEntry = pBooks[id].doc;
if (bookEntry.value && bookEntry.value.volumeInfo) {
var idInfoDtls = bookEntry.value.volumeInfo.industryIdentifiers;
if (idInfoDtls) {
if (idInfoDtls[0].identifier == pISBN) {
response.books[id] = bookEntry;
response.count++;
} else {
if (idInfoDtls.length > 1 && idInfoDtls[1].identifier == pISBN) {
response.books[id] = bookEntry;
response.count++;
}
}
}
}
}
$log.info('Got ' + response.count + ' results.');
return response;
} else {
$log.info('Got no results.');
return false;
}
},
searchID: function (pBooks, pID) {
if (pBooks && pBooks.length > 0) {
var response = {};
response.books = {};
response.count = 0;
for (var id in pBooks) {
var bookEntry = pBooks[id].doc;
if (bookEntry.value && bookEntry.value.id == pID) {
response.books[id] = bookEntry;
response.count++;
}
}
$log.info('Got ' + response.count + ' results.');
return response;
} else {
$log.info('Got no results.');
return false;
}
},
search: function (pSearchQuery) {
var deferred = $q.defer(),
response = {},
self = this,
bookDB = getDB();
$log.debug('Starting search: ' + JSON.stringify(pSearchQuery));
if (pSearchQuery.isbn) {
var isbn = '' + pSearchQuery.isbn;
$log.debug('Starting isbn-search: ' + isbn);
bookDB.allDocs({
include_docs: true,
descending: true
}, function (err, res) {
$rootScope.$apply(function () {
if (!err) {
var result = self.searchISBN(res.rows, isbn);
if (!result) {
deferred.reject(response);
} else {
deferred.resolve(result);
}
} else {
$log.error('Search error: ' + err);
deferred.reject(response);
}
});
});
} else {
if (pSearchQuery.id) {
var bookId = '' + pSearchQuery.id;
$log.debug('Starting id-search: ' + bookId);
bookDB.allDocs({
include_docs: true,
descending: true
}, function (err, res) {
$rootScope.$apply(function () {
if (!err) {
var result = self.searchID(res.rows, bookId);
if (!result) {
deferred.reject(response);
} else {
deferred.resolve(result);
}
} else {
$log.error('Search error: ' + err);
deferred.reject(response);
}
});
});
} else {
$log.error('Got unknown search query');
deferred.reject(response);
}
}
return deferred.promise;
},
remove: function (pBookToRemove) {
var deferred = $q.defer(),
self = this,
response = {},
bookDB = getDB();
$log.debug('Starting delete of book: ' + pBookToRemove.value.volumeInfo.title);
if (bookDB) {
var searchQuery = {};
searchQuery.id = pBookToRemove.value.id;
self.search(searchQuery).then(function (searchResponse) {
var count = 0,
booksToBeRemoved = [];
if (searchResponse.books) {
count = searchResponse.count;
}
if (count > 0) {
for (var index in searchResponse.books) {
var bookToRemove = searchResponse.books[index];
bookToRemove._deleted = true;
booksToBeRemoved.push(bookToRemove);
deferred.resolve({});
}
} else {
$log.error('Error deleting entry. Book not found');
deferred.reject(response);
}
bookDB.bulkDocs(booksToBeRemoved, function (err) {
$rootScope.$apply(function () {
if (!err) {
$log.info('Delete of entry was successfull.');
updateIndex(bookDB);
} else {
$log.error('Error deleting entry: ' + err);
deferred.reject(err);
}
});
}, function (response) {
$log.error('Error deleting entry.');
deferred.reject(response);
});
});
}
return deferred.promise;
},
saveUpdated: function (pBookToSave, pExistingEntries) {
var deferred = $q.defer(),
bookDB = getDB();
$log.debug('Starting update for book: ' + pBookToSave.value.volumeInfo.title);
if (bookDB) {
var docs = [];
for (var index in pExistingEntries) {
var book = pExistingEntries[index];
book.value = pBookToSave.value;
if (pBookToSave.image) {
book._attachments = book._attachments || {};
book._attachments[pBookToSave.image.name] = {};
book._attachments[pBookToSave.image.name].content_type = pBookToSave.image.content_type;
book._attachments[pBookToSave.image.name].data = pBookToSave.image.data;
}
if (pBookToSave.ebook) {
book._attachments = book._attachments || {};
book._attachments[pBookToSave.ebook.name] = {};
book._attachments[pBookToSave.ebook.name].content_type = pBookToSave.ebook.content_type;
book._attachments[pBookToSave.ebook.name].data = pBookToSave.ebook.data;
}
if (book._attachments) {
book._attachments = book._attachments;
}
docs.push(book);
}
bookDB.bulkDocs(docs, function (err, result) {
$rootScope.$apply(function () {
if (!err) {
$log.info('Update successfull.');
deferred.resolve(result);
} else {
$log.error('Error updating book:' + err);
deferred.reject(err);
}
});
});
} else {
$log.error('Error during db connection');
deferred.reject({});
}
return deferred.promise;
},
save: function (pBookToSave) {
var deferred = $q.defer(),
self = this,
response = {},
bookDB = getDB();
// set to 1 if no amount was set
if (!pBookToSave.count) {
pBookToSave.count = 1;
}
$log.debug('Starting save for book: ' + pBookToSave.value.volumeInfo.title);
if (bookDB) {
// update already saved entry, maybe changed amount?
var searchQuery = {};
if (pBookToSave.value.volumeInfo.industryIdentifiers && pBookToSave.value.volumeInfo.industryIdentifiers.length > 1) {
searchQuery.isbn = pBookToSave.value.volumeInfo.industryIdentifiers[1].identifier;
} else {
searchQuery.id = pBookToSave.value.id;
}
self.search(searchQuery).then(function (searchResponse) {
$log.info('Found already an db entry');
var count = 0;
if (searchResponse.books) {
count = searchResponse.count;
}
if (count === pBookToSave.count) {
$log.info('Amount not changed');
self.saveUpdated(pBookToSave, searchResponse.books).then(function () {
$log.info('Update was successfull.');
deferred.resolve(response);
updateIndex(bookDB);
}, function (response) {
$log.error('Error updating entry.');
deferred.reject(response);
});
} else {
var booksToAdd = pBookToSave.count - count;
if (booksToAdd > 0) {
$log.info('Adding ' + booksToAdd + ' new entries.');
var docs = [];
for (var i = 1; i <= booksToAdd; i++) {
var book = {};
book.value = pBookToSave.value;
if (pBookToSave.image) {
book._attachments = {};
book._attachments[pBookToSave.image.name] = {};
book._attachments[pBookToSave.image.name].content_type = pBookToSave.image.content_type;
book._attachments[pBookToSave.image.name].data = pBookToSave.image.data;
}
if (pBookToSave.ebook) {
book._attachments = {};
book._attachments[pBookToSave.ebook.name] = {};
book._attachments[pBookToSave.ebook.name].content_type = pBookToSave.ebook.content_type;
book._attachments[pBookToSave.ebook.name].data = pBookToSave.ebook.data;
}
docs.push(book);
}
bookDB.bulkDocs(docs, function (err) {
$rootScope.$apply(function () {
if (!err) {
response.books = docs;
$log.info('Saving successfull.');
updateIndex(bookDB);
deferred.resolve(response);
} else {
$log.error('Error saving new entries: ' + err);
deferred.reject(response);
}
});
});
} else {
var countExisting = 0,
booksToRemove = Math.abs(booksToAdd);
$log.info('Removing ' + booksToRemove + ' existing entries.');
var booksToBeRemoved = [],
booksToBeUpdated = [];
for (var index in searchResponse.books) {
var currentBook = searchResponse.books[index];
if (countExisting < booksToRemove) {
currentBook._deleted = true;
currentBook._attachments = null;
booksToBeRemoved.push(currentBook);
countExisting++;
} else {
booksToBeUpdated.push(currentBook);
}
}
bookDB.bulkDocs(booksToBeRemoved, function (err) {
$rootScope.$apply(function () {
if (!err) {
$log.info('Delete was successfull.');
self.saveUpdated(pBookToSave, booksToBeUpdated).then(function (saveResponse) {
$log.info('Update was successfull.');
deferred.resolve(saveResponse);
updateIndex(bookDB);
}, function (response) {
$log.error('Error updating entry.');
deferred.reject(response);
});
} else {
$log.error('Error during: ' + err);
deferred.reject(err);
}
});
}, function (response) {
$log.error('Error deleting entry.');
deferred.reject(response);
});
}
}
}, function (response) {
$log.info('Found no existing entries');
var docs = [];
for (var i = 1; i <= pBookToSave.count; i++) {
var book = {};
book.value = pBookToSave.value;
if (pBookToSave.image) {
book._attachments = {};
book._attachments[pBookToSave.image.name] = {};
book._attachments[pBookToSave.image.name].content_type = pBookToSave.image.content_type;
book._attachments[pBookToSave.image.name].data = pBookToSave.image.data;
}
if (pBookToSave.ebook) {
book._attachments = {};
book._attachments[pBookToSave.ebook.name] = {};
book._attachments[pBookToSave.ebook.name].content_type = pBookToSave.ebook.content_type;
book._attachments[pBookToSave.ebook.name].data = pBookToSave.ebook.data;
}
docs.push(book);
}
bookDB.bulkDocs(docs, function (err) {
$rootScope.$apply(function () {
if (!err) {
response.books = docs;
$log.info('Saving successfull.');
deferred.resolve(response);
updateIndex(bookDB);
} else {
$log.error('Error saving new entries: ' + err);
deferred.reject(response);
}
});
});
});
} else {
$log.error('Error during db connection');
deferred.reject(response);
}
return deferred.promise;
}
};
}
);