Synnefo

// Copyright 2011 GRNET S.A. All rights reserved.

// 

// Redistribution and use in source and binary forms, with or

// without modification, are permitted provided that the following

// conditions are met:

// 

//   1. Redistributions of source code must retain the above

//      copyright notice, this list of conditions and the following

//      disclaimer.

// 

//   2. Redistributions in binary form must reproduce the above

//      copyright notice, this list of conditions and the following

//      disclaimer in the documentation and/or other materials

//      provided with the distribution.

// 

// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

// POSSIBILITY OF SUCH DAMAGE.

// 

// The views and conclusions contained in the software and

// documentation are those of the authors and should not be

// interpreted as representing official policies, either expressed

// or implied, of GRNET S.A.

// 

;(function(root){

    // root

    var root = root;

    // setup namepsaces

    var snf = root.synnefo = root.synnefo || {};

    var models = snf.models = snf.models || {}

    var storage = snf.storage = snf.storage || {};

    var ui = snf.ui = snf.ui || {};

    var util = snf.util = snf.util || {};

    var views = snf.views = snf.views || {}

    // shortcuts

    var bb = root.Backbone;

    views.MetadataView = views.Overlay.extend({

        view_id: "metadata_view",

        content_selector: "#metadata-overlay-content",

        css_class: 'overlay-metadata overlay-info',

        overlay_id: "metadata-overlay",

        subtitle: "",

        title: "Manage tags",

        initialize: function(options) {

            views.MetadataView.__super__.initialize.apply(this);

            _.bindAll(this);

            this.current_vm = undefined;

            this.list = this.$(".options-list");

            this.tpl = this.$("li.meta-object-tpl");

            this.editor = this.$(".editor");

            this.pre_init_handlers();

        },

        pre_init_handlers: function() {

            this.$(".editor .cancel").click(_.bind(function(){

                this.close_editor();

            }, this))

            this.$(".editor .create").click(_.bind(function(){

                this.submit_editor();

            }, this));

        },

        show: function(vm) {

            this.current_vm = vm;

            this.current_vm.bind("change", this.handle_vm_change);

            views.MetadataView.__super__.show.apply(this);

        },

        get_meta: function() {

            return this.current_vm.get('metadata');

        },

        get_meta_el: function(key, value) {

            return this.tpl.clone();

        },

        beforeOpen: function() {

            this.update_layout();

        },

        update_layout: function() {

            if (!this.editing) {

                this.editor.hide();

            }

            this.update_vm_details();

            // update metadata

            this.list.empty();

            _.each(this.get_meta(), _.bind(function(value, key) {

                var el = this.get_meta_el();

                el.find(".title").text(util.truncate(key, 15)).attr("title", key);

                el.find(".value").text(util.truncate(value, 15)).attr("title", value);

                el.data('meta', {'key':key, 'value':value});

                this.list.append(el);

                $(el).data({key:key, value:value});

            }, this));

            this.list.append('<li class="options-object create">' + 

                             '<div class="options-object-cont">' +

                             '<span class="title">Add new</span>' + 

                             '<span class="value">tag</span>' + 

                             '</div>' + 

                             '</li>')

            this.list.show();

            this.init_handlers();

        },

        meta_from_el: function(el) {

            return el.closest("li").data("meta");

        },

        show_editor: function(meta, el) {

            this.editing = true;

            this.editor.find("label").removeClass("error");

            if (meta) {

                this.editor.find(".predefined").hide();

                this.editor.find("input.meta-key").val(meta.key).attr("disabled", true);

                this.editor.find("input.meta-value").val(meta.value);

            } else {

                this.editor.find(".predefined").show();

                this.editor.find("input.meta-key").val("").attr("disabled", false);

                this.editor.find("input.meta-value").val("");

            }

            this.$(".editor").fadeIn(200);

            if (meta) {

                this.editor.find("input.meta-value").focus().select();

            } else {

                this.editor.find("input.meta-key").focus();

            }

            // remove predefined for existing keys

            var existing_keys = this.current_vm.get_meta_keys();

            if (!meta) {

                this.editor.find(".predefined-meta-key").each(function(i, el){

                    if (_.contains(existing_keys, $(el).text())) {

                        $(el).hide();

                    } else {

                        $(el).show();

                    }

                })

            }

        },

        update_vm_details: function() {

            // show proper title

            this.set_subtitle(this.current_vm.escape("name") + snf.ui.helpers.vm_icon_tag(this.current_vm, "small"));

        },

        validate: function(meta) {

            if (!meta) { return false };

            if ((meta.key && meta.key != "") && (meta.value && meta.value != "")) {

                return true;

            }

            return false;

        },

        get_editor_values: function() {

            var meta = {};

            meta.key = this.editor.find("input.meta-key").val();

            meta.value = this.editor.find("input.meta-value").val();

            meta.key = _(meta.key).trim();

            meta.value = _(meta.value).trim();

            return meta;

        },

        submit_editor: function() {

            if (!this.editing) { return };

            this.editing = false;

            var meta = this.get_editor_values();

            if (this.validate(meta)) {

                this.$(".editor .create").addClass('in-progress');

                this.current_vm.save_meta(meta, _.bind(function() {

                    this.close_editor();

                    this.$(".editor .create").removeClass('in-progress');

                }, this));

            } else {

                this.editing = true;

                this.editor.find(".form-field label").addClass("error");

            }

        },

        remove_meta: function(key) {

            this.current_vm.remove_meta(key);

        },

        close_editor: function() {

            this.$(".editor").fadeOut(100);

            this.editing = false;

        },

        init_handlers: function() {

            var self = this;

            this.list.find(".remove").click(function(e){

                e.preventDefault();

                var meta = self.meta_from_el($(this));

                self.remove_meta(meta.key);

                $(this).parent().parent().parent().remove();

            });

            this.list.find(".edit").click(function(e) {

                e.preventDefault();

                var meta = self.meta_from_el($(this));

                self.show_editor(meta, $(this));

            })

            //this.list.find(".options-object").dblclick(function(e) {

                //e.preventDefault();

                //var meta = self.meta_from_el($(this));

                //self.show_editor(meta, $(this));

            //})

            this.list.find("li.create").click(function(){

                self.show_create();

            })

            this.editor.find("input").keyup(_.bind(function(e){

                e.keyCode = e.keyCode || e.which;

                if (e.keyCode == 13) { this.submit_editor() };    

                if (e.keyCode == 27) { this.close_editor() };    

            }, this));

            this.editor.find(".predefined-meta-key").click(function() {

                self.editor.find("input.meta-key").val($(this).text());

                self.editor.find("input.meta-value").focus();

            })

        },

        show_create: function() {

            this.$(".editor .create").removeClass('in-progress');

            this.show_editor();

        },

        unbind_vm_handlers: function() {

            if (!this.current_vm) { return }

            this.current_vm.unbind("change", this.handle_vm_change);

        },

        handle_vm_change: function(vm) {

            // if overlay has been closed and for

            // some reason change event still triggers

            // force event unbind

            if (!this.current_vm) {

                vm.unbind("change", this.handle_vm_change);

                return;

            } 

            this.update_vm_details();

            this.update_layout();

        },

        onClose: function() {

            this.editing = false;

            this.unbind_vm_handlers();

            this.current_vm = undefined;

        }

    });

})(this);