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Storage.js
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Storage.js
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//Storage.js
// First, let's create a short helper function to get the database connection
function getDatabase() {
return LocalStorage.openDatabaseSync("CNotes", "1.0", "CNotesDB", 100000);
}
// At the start of the application, we can initialize the tables we need if they haven't been created yet
function initialize() {
var db = getDatabase();
db.transaction(
function(tx) {
// Create the notes table if it doesn't already exist
// If the table exists, this is skipped
tx.executeSql('CREATE TABLE IF NOT EXISTS notes(id TEXT NOT NULL, title TEXT NOT NULL, body TEXT NOT NULL,'
+ 'category TEXT NOT NULL, tag TEXT NOT NULL, archive TEXT NOT NULL, view TEXT NOT NULL, links TEXT NOT NULL)');
tx.executeSql('CREATE TABLE IF NOT EXISTS categories(name TEXT NOT NULL)');
tx.executeSql('CREATE TABLE IF NOT EXISTS tags(name TEXT NOT NULL)');
});
}
function deleteDatabase() {
var db = getDatabase();
db.transaction(
function(tx){
tx.executeSql("DROP TABLE notes;");
tx.executeSql("DROP TABLE categories")
tx.executeSql("DROP TABLE tags")
// tx.executeSql("DROP DATABASE CNotesDB;");
}
);
}
// This function is used to write a setting into the database
function setNote(id, title, body, category, tag, archive, view, links) {
var db = getDatabase();
var res = "";
db.transaction(function(tx) {
var rs = tx.executeSql('INSERT OR REPLACE INTO notes VALUES (?,?,?,?,?,?,?,?);', [id,title,body,category,tag,archive,view,links]);
//console.log(rs.rowsAffected)
if (rs.rowsAffected > 0) {
res = "OK";
} else {
res = "Error";
}
}
);
// The function returns “OK” if it was successful, or “Error” if it wasn't
return res;
}
function removeNote(id) {
var db = getDatabase();
var res = "";
db.transaction(function(tx) {
var rs = tx.executeSql('DELETE FROM notes WHERE id=?;', [id]);
//console.log(rs.rowsAffected)
if (rs.rowsAffected > 0) {
res = "OK";
} else {
res = "Error";
}
}
);
return res;
}
function fetchAllNotesWithTag(t) {
var db = getDatabase();
var res= new Array();
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT * FROM notes;');
var k = 0
for (var i = 0; i < rs.rows.length; i++) {
if (containTag(rs.rows.item(i).tag.split(','), t)) {
res[k] = rs.rows.item(i).id
k++
}
}
})
return res
}
function containTag(tagsArray, t) {
//This function is a bit different from CNotes.qml containTag function
for (var i = 0; i < tagsArray.length; i++) {
if (tagsArray[i] === t)
return true
return false
}
}
function fetchAllNotesWithCategory(c) {
var db = getDatabase();
var res= new Array();
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT id FROM notes WHERE category=?;', [c]);
var k = 0;
for (var i = 0; i < rs.rows.length; i++) {
res[k] = rs.rows.item(i).id
k++
}
})
return res
}
function fetchNotes(archive) {
var db = getDatabase();
var res = new Array();
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT * FROM notes WHERE archive=?;', [archive]);
for (var i = 0; i < rs.rows.length; i++) {
res[i] = rs.rows.item(i).id
}
})
return res
}
function getCount() {
var db = getDatabase();
var res = "";
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT * FROM notes;');
res = rs.rows.length
})
return res;
}
function getTitle(id) {
var db = getDatabase();
var res="";
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT title FROM notes WHERE id=?;', [id]);
if (rs.rows.length > 0) {
res = rs.rows.item(0).title;
} else {
res = "Unknown";
}
})
return res
}
function getBody(id) {
var db = getDatabase();
var res="";
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT body FROM notes WHERE id=?;', [id]);
if (rs.rows.length > 0) {
res = rs.rows.item(0).body;
} else {
res = "Unknown";
}
})
return res
}
function getCategory(id) {
var db = getDatabase();
var res="";
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT category FROM notes WHERE id=?;', [id]);
if (rs.rows.length > 0) {
res = rs.rows.item(0).category;
} else {
res = "Unknown";
}
})
return res
}
function getTags(id) {
var db = getDatabase();
var res="";
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT tag FROM notes WHERE id=?;', [id]);
if (rs.rows.length > 0) {
res = rs.rows.item(0).tag;
} else {
res = "Unknown";
}
})
return res
}
function getArchive(id) {
var db = getDatabase();
var res="";
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT archive FROM notes WHERE id=?;', [id]);
if (rs.rows.length > 0) {
res = rs.rows.item(0).archive;
} else {
res = "Unknown";
}
})
return res
}
function getView(id) {
var db = getDatabase();
var res="";
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT view FROM notes WHERE id=?;', [id]);
if (rs.rows.length > 0) {
res = rs.rows.item(0).view;
} else {
res = "Unknown";
}
})
return res
}
function getLinks(id) {
var db = getDatabase();
var res="";
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT links FROM notes WHERE id=?;', [id]);
if (rs.rows.length > 0) {
res = rs.rows.item(0).links;
} else {
res = "Unknown";
}
})
return res
}
function fetchAllCategories() {
var db = getDatabase();
var res= new Array();
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT * FROM categories;');
for (var i = 0; i < rs.rows.length; i++) {
res[i] = rs.rows.item(i).name
}
})
return res
}
function addCategory(name) {
var db = getDatabase();
var res = "";
db.transaction(function(tx) {
var rs = tx.executeSql('INSERT INTO categories VALUES (?);', [name]);
//console.log(rs.rowsAffected)
if (rs.rowsAffected > 0) {
res = "OK";
} else {
res = "Error";
}
}
);
// The function returns “OK” if it was successful, or “Error” if it wasn't
return res;
}
function replaceCategory(old, name) {
removeCategory(old)
addCategory(name)
}
function removeCategory(name) {
var db = getDatabase();
var res = "";
db.transaction(function(tx) {
var rs = tx.executeSql('DELETE FROM categories WHERE name=?;', [name]);
//console.log(rs.rowsAffected)
if (rs.rowsAffected > 0) {
res = "OK";
} else {
res = "Error";
}
}
);
return res;
}
function addTag(oldTag, newTag) {
var db = getDatabase();
var res = "";
db.transaction(function(tx) {
if (oldTag !== "") {
var rs = tx.executeSql('DELETE FROM categories WHERE name=?;', [oldTag]);
}
var rs = tx.executeSql('INSERT INTO tags VALUES(?);', [newTag]);
//console.log(rs.rowsAffected)
if (rs.rowsAffected > 0) {
res = "OK";
} else {
res = "Error";
}
}
);
return res;
}
function getUsedTags () {
var db = getDatabase();
var res= new Array();
db.transaction(function(tx) {
var rs = tx.executeSql('SELECT * FROM tags;');
for (var i = 0; i < rs.rows.length; i++) {
res[i] = rs.rows.item(i).name
}
})
return res
}