/*
    File: notes.js
    
    Abstract: Sticky Notes Demo
    
    Version: 1.0
    
    Disclaimer: IMPORTANT:  This Apple software is supplied to you by
    Apple Inc. ("Apple") in consideration of your agreement to the
    following terms, and your use, installation, modification or
    redistribution of this Apple software constitutes acceptance of these
    terms.  If you do not agree with these terms, please do not use,
    install, modify or redistribute this Apple software.
    
    In consideration of your agreement to abide by the following terms, and
    subject to these terms, Apple grants you a personal, non-exclusive
    license, under Apple's copyrights in this original Apple software (the
    "Apple Software"), to use, reproduce, modify and redistribute the Apple
    Software, with or without modifications, in source and/or binary forms;
    provided that if you redistribute the Apple Software in its entirety and
    without modifications, you must retain this notice and the following
    text and disclaimers in all such redistributions of the Apple Software.
    Neither the name, trademarks, service marks or logos of Apple Inc.
    may be used to endorse or promote products derived from the Apple
    Software without specific prior written permission from Apple.  Except
    as expressly stated in this notice, no other rights or licenses, express
    or implied, are granted by Apple herein, including but not limited to
    any patent rights that may be infringed by your derivative works or by
    other works in which the Apple Software may be incorporated.
    
    The Apple Software is provided by Apple on an "AS IS" basis.  APPLE
    MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
    THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
    FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
    OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
    
    IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
    MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
    AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
    STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.
    
    Copyright (C) 2010 Apple Inc. All Rights Reserved.
*/

var db;

try {
    if (window.openDatabase)
    {
        db = openDatabase("NoteTest", "1.0", "HTML5 Database API example", 200000);
        if (!db)
        {
     	    //alert("La base de données de votre navigateur est pleine. Merci de la vider puis réessayez.");
     	    document.getElementById("boite_note").style.display = "none";
        }
    }
    else
    {
    	//alert("Votre navigateur ne possède pas de base de données local. Merci de télécharger un navigateur tel que Safari qui gère cette fonctionnalité.");
    	document.getElementById("boite_note").style.display = "none";
    }
} catch(err) { }

const SupportsTouches = ('createTouch' in document);
const StartEventType = SupportsTouches ? 'touchstart' : 'mousedown';
const MoveEventType = SupportsTouches ? 'touchmove' : 'mousemove';
const EndEventType = SupportsTouches ? 'touchend' : 'mouseup';

var captured = null;
var highestZ = 0;
var highestId = 0;
var allNotes = new Array();

function Note()
{
    var self = this;

    var note = document.createElement('div');
    note.className = 'note';
    note.addEventListener('click', this, false);
    this.note = note;

    var edit = document.createElement('textarea');
    edit.className = 'edit';
    edit.addEventListener('keyup', this, false);
    note.appendChild(edit);
    this.editField = edit;

    var overlay = document.createElement('div');
    overlay.className = 'overlay';
    note.appendChild(overlay);
    this.overlay = overlay;

    var ts = document.createElement('div');
    ts.className = 'timestamp';
    ts.addEventListener(StartEventType, this, false);
    note.appendChild(ts);
    this.lastModified = ts;

    var close = document.createElement('div');
    close.className = 'closebutton';
    close.addEventListener(StartEventType, this, false);
    note.appendChild(close);

    document.getElementById("note").appendChild(note);
    
    allNotes.push(this);

    return this;
}

Note.prototype = {
    get id()
    {
        if (!("_id" in this))
            this._id = 0;
        return this._id;
    },

    set id(x)
    {
        this._id = x;
    },

    get text()
    {
        return this.editField.value;
    },

    set text(x)
    {
        this.editField.value = x;
    },

    get timestamp()
    {
        if (!("_timestamp" in this))
            this._timestamp = 0;
        return this._timestamp;
    },

    set timestamp(x)
    {
        if (this._timestamp == x)
            return;

        this._timestamp = x;
        var date = new Date();
        date.setTime(parseFloat(x));
        this.lastModified.textContent = modifiedString(date);
    },

    get left()
    {
        return this.note.style.left;
    },

    set left(x)
    {
        this.note.style.left = x;
    },

    get top()
    {
        return this.note.style.top;
    },

    set top(x)
    {
        this.note.style.top = x;
    },

    get zIndex()
    {
        return this.note.style.zIndex;
    },

    set zIndex(x)
    {
        this.note.style.zIndex = x;
    },

    close: function(event)
    {
        this.cancelPendingSave();

        var self = this;
        db.transaction(function(tx)
        {
            tx.executeSql("DELETE FROM WebKitStickyNotes WHERE id = ?", [self.id]);
        });
        
        var duration = 250;
        
        if (event.shiftKey) {
            duration *= 10;
            this.note.style.webkitTransitionDuration = duration + 'ms';
        }
        this.note.className = "note closed";

        setTimeout(function() { self.delayedDestroy(); }, duration);
    },

    delayedDestroy: function()
    {
        var index = allNotes.indexOf(this);
        array.splice(index, 1);
        document.body.removeChild(this.note);
    },

    saveSoon: function()
    {
        this.cancelPendingSave();
        var self = this;
        this._saveTimer = setTimeout(function() { self.save(); }, 200);
    },

    cancelPendingSave: function()
    {
        if (!("_saveTimer" in this))
            return;
        clearTimeout(this._saveTimer);
        delete this._saveTimer;
    },

    save: function()
    {
        this.cancelPendingSave();

        if ("dirty" in this) {
            this.timestamp = new Date().getTime();
            delete this.dirty;
        }

        var note = this;
        db.transaction(function (tx)
        {
            tx.executeSql("UPDATE WebKitStickyNotes SET note = ?, timestamp = ?, left = ?, top = ?, zindex = ? WHERE id = ?", [note.text, note.timestamp, note.left, note.top, note.zIndex, note.id]);
        });
    },

    saveAsNew: function()
    {
        this.timestamp = new Date().getTime();
        
        var note = this;
        db.transaction(function (tx) 
        {
            tx.executeSql("INSERT INTO WebKitStickyNotes (id, note, timestamp, left, top, zindex) VALUES (?, ?, ?, ?, ?, ?)", [note.id, note.text, note.timestamp, note.left, note.top, note.zIndex]);
        }); 
    },

    handleEvent: function(event)
    {
        switch (event.type) {
        
        case StartEventType:
            if (event.currentTarget.className == 'closebutton') {
                event.preventDefault();
                this.close(event);
            } else {
                this.onDragStart(event);
            }
            break;
        case MoveEventType:
            this.onDragMove(event);
            break;
        case EndEventType:
            this.onDragEnd(event);
            break;
        case "click":
            this.onNoteClick();
            break;
        case "keyup":
            this.onKeyUp();
            break;
        }
    },

    onNoteClick: function(e)
    {
        this.editField.focus();
        getSelection().collapseToEnd();
    },

    onKeyUp: function()
    {
        this.dirty = true;
        this.saveSoon();
    }
};

function loaded()
{
    db.transaction(function(tx) {
        tx.executeSql("SELECT COUNT(*) FROM WebkitStickyNotes", [], function(result) {
            loadNotes();
        }, function(tx, error) {
            tx.executeSql("CREATE TABLE WebKitStickyNotes (id REAL UNIQUE, note TEXT, timestamp REAL, left TEXT, top TEXT, zindex REAL)", [], function(result) { 
                loadNotes(); 
            });
        });
    });
}

function loadNotes()
{
    db.transaction(function(tx) {
        tx.executeSql("SELECT id, note, timestamp, left, top, zindex FROM WebKitStickyNotes", [], function(tx, result) {
            for (var i = 0; i < result.rows.length; ++i) {
                var row = result.rows.item(i);
                var note = new Note();
                note.id = row['id'];
                note.text = row['note'];
                note.timestamp = row['timestamp'];
                note.left = row['left'];
                note.top = row['top'];
                note.zIndex = row['zindex'];

                if (row['id'] > highestId)
                    highestId = row['id'];
                if (row['zindex'] > highestZ)
                    highestZ = row['zindex'];
            }

            if (!result.rows.length)
                newNote();
        }, function(tx, error) {
            alert('Failed to retrieve notes from database - ' + error.message);
            return;
        });
    });
}

function zeroPadIfNecessary(num)
{
    if (num < 10)
        return "0" + num;
    else
        return num;
}

function modifiedString(date)
{
    return 'Dernière modification : ' + zeroPadIfNecessary(date.getDate()) + '/' + zeroPadIfNecessary(date.getMonth() + 1) + '/' + date.getFullYear() + ' à ' + zeroPadIfNecessary(date.getHours()) + ':' + zeroPadIfNecessary(date.getMinutes()) + ':' + zeroPadIfNecessary(date.getSeconds());
}

function newNote()
{
    var note = new Note();
    note.id = ++highestId;
    note.timestamp = new Date().getTime();
    note.zIndex = ++highestZ;
    note.saveAsNew();
}

addEventListener('load', loaded, false);