snapdrop/app/elements/p2p-network/file-transfer-protocol.html

<script>
'use strict';
window.Chat = window.Chat || {};
Chat.FileTransferProtocol = {
    properties: {
        loading: {
            type: Boolean,
            notify: true,
            value: false,
            observer: '_loadingChanged'
        },
        buddies: {
            notify: true
        }
    },
    listeners: {
        'system-event': '_onSystemMsg',
        'file-received': '_onFileReceived',
    },
    _onSystemMsg: function(event) {
        var msg = event.detail;
        console.log('FTP received sysMsg:', msg);

        switch (msg.type) {
            case 'handshake':
                this._onHandshake(msg);
                break;
            case 'offer':
                this._onOffered(msg);
                break;
            case 'decline':
                this._onDeclined(msg);
                break;
            case 'accept':
                this._onAccepted(msg);
                break;
            case 'transfer':
                this._onTransfer(msg);
                break;
            case 'received':
                this._onReceived(msg);
                break;
            case 'buddies':
                this._onBuddies(msg);
                break;
        }
    },
    sendFile: function(peerId, file) {
        this.set('loading', true);
        this.fileToSend = file;
        this.fire('file-offered', {
            to: peerId
        });
        this.connectToPeer(peerId, function() {
            this._offer(peerId, file);
        }.bind(this));

        //set 15sec timeout
        this._timeoutTimer = this.async(function() {
            this._onError();
        }, 15000);
    },
    _offer: function(toPeer, file) {
        console.log('FTP offer file:', file, 'To:', toPeer);

        this._sendSystemEvent(toPeer, {
            type: 'offer',
            name: file.name
        });
    },
    _onOffered: function(offer) {
        console.log('FTP offered file:', offer.name, 'From:', offer.from);
        this.fire('file-offer', {
            from: offer.from,
            name: offer.name
        });
    },
    decline: function(offer) {
        this._sendSystemEvent(offer.from, {
            type: 'decline',
            name: offer.name
        });
    },
    _onDeclined: function(offer) {
        this.cancelAsync(this._timeoutTimer);
        delete this.fileToSend;
        this.set('loading', false);
        this.fire('file-declined', offer);
    },
    accept: function(offer) {
        this._sendSystemEvent(offer.from, {
            type: 'accept',
            name: offer.name
        });
        this.fire('download-started', {
            from: offer.from
        });
    },
    _onAccepted: function(offer) {
        this.cancelAsync(this._timeoutTimer);
        this._sendSystemEvent(offer.from, {
            type: 'transfer',
            name: offer.name
        });
        this.fire('upload-started', {
            to: offer.from
        });
        this._sendFile(offer.from, this.fileToSend);
    },
    _onTransfer: function() {
        this.loading = true;
    },
    _onFileReceived: function(event) {
        var file = event.detail;
        this.loading = false;
        this._sendSystemEvent(file.from, {
            type: 'received',
            name: file.name
        });
        this.fire('download-complete', {
            from: file.from
        });
        console.log('FTP received:', file);
    },
    _onReceived: function(offer) {
        this.loading = false;
        this.fire('upload-complete', offer);
    },
    _onError: function() {
        this.loading = false;
        this.fire('upload-error');
    },
    _loadingChanged: function(loading) {
        window.anim(loading);
    },
    _onBuddies: function(msg) {
        this.set('buddies', msg.buddies);
    }
};
</script>