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

    // shortcuts

    var bb = root.Backbone;

    // logging

    var logger = new snf.logging.logger("SNF-VIEWS");

    var debug = _.bind(logger.debug, logger);

    var hasKey = Object.prototype.hasOwnProperty;

    // base class for views that contain/handle VMS

    views.VMListView = views.View.extend({

        // just a flag to identify that

        // views of this type handle vms

        vms_view: true,

        selectors: {},

        hide_actions: true,

        pane: "#machines-pane",

        metadata_view: undefined,

        initialize: function() {

            views.VMListView.__super__.initialize.call(this);

            this._vm_els = {};

            this.set_storage_handlers();

            this.set_handlers();

            this.vms_updated_handler();

            this.connect_overlay = new views.VMConnectView();

        },

        // Helpers

        //

        // get element based on this.selectors key/value pairs

        sel: function(id, params) {

            if (!this.selectors[id]){ return };

            return $(this.selectors[id].format(params));

        },

        // vm element based on vm model instance provided

        vm: function(vm) {

            if (hasKey.call(this._vm_els, vm.id)) {

                ret = this._vm_els[vm.id];

            } else {

                return $([]);

            }

            return ret;

        },

        // get vm model instance from DOM element

        vm_for_element: function(el) {

            return storage.vms.sel(this.vm_id_for_element(el));

        },

        // Event binding and stuff like that

        //

        set_storage_handlers: function() {

            storage.vms.bind("add", _.bind(this.vms_updated_handler, this, "add"));

            storage.vms.bind("change", _.bind(this.vms_updated_handler, this, "change"));

            storage.vms.bind("reset", _.bind(this.vms_updated_handler, this, "reset"));

            storage.vms.bind("remove", _.bind(this.vms_updated_handler, this, "remove"));

        },

        // vms updated triggered, update view vms

        vms_updated_handler: function (method, model, arg2, arg3) {

            var updated = storage.vms.models;

            if (method == "add") { updated = [model] };

            if (method == "change") { updated = [model] };

            if (method == "remove") { updated = [model] };

            if (method == "remove") {

                this.remove_vm(model)

                return;

            }

            this.update_vms(updated);

        },

        // create vm

        // append it on proper view container

        create_vm: function(vm) {

            // create dom element

            var vm_view = this.create_vm_element(vm);

            vm_view.find(".vm-actions").attr("id", this.view_id+"-actions-" + vm.id);

            this._vm_els[vm.id] = vm_view;

            var container = this.get_vm_container(vm);

            container.append(vm_view);

            vm_view.find(".action-indicator").text("");

            if (this.visible()) {

                container.show()

            }

            // initialize vm specific event handlers 

            this.__set_vm_handlers(vm);

            return vm_view;

        },

        // create vm dom element

        create_vm_element: function(vm) {

            // clone template

            return this.sel('tpl').clone().attr("id", this.id_tpl + vm.id)

        },

        // get proper vm container

        get_vm_container: function(vm) {

            if (vm.is_active()) {

                return this.sel("vm_cont_active");

            } else {

                return this.sel("vm_cont_terminated");

            }

        },

        // create and append inside the proper container the vm model

        // if it doesn't exist update vm data and make it visible

        add: function(vm) {

            // create if it does not exist

            if (!hasKey.call(this._vm_els, vm.id)) {

                var el = this.create_vm(vm);

                el.show();

                this.post_add(vm);

            }

            return this.vm(vm);

        },

        // helpers for VMListView descendants

        post_add: function(vm) { throw "Not implemented" },

        set_vm_handlers: function(vm) { throw "Not implemented" },

        set_handlers: function() { throw "Not implemented" },

        update_layout: function() { throw "Not implemented" },

        post_update_vm: function(vm) { throw "Not implemented" },

        update_details: function(vm) {},

        // remove vm

        remove_vm: function(vm) {

            // FIXME: some kind of transiton ??? effect maybe ???

            this.vm(vm).remove();

            this.post_remove_vm(vm);

            if (hasKey.call(this._vm_els, vm.id)) {

                delete this._vm_els[vm.id];

            }

        },

        // remove all vms from view

        clear: function() {

            this.sel('vms').remove();

            this.__update_layout();

        },

        show: function() {

            views.VMListView.__super__.show.apply(this, arguments);

            if (storage.vms.length == 0) { this.hide() };

            if (!snf.config.update_hidden_views) {

                this.update_vms(storage.vms.models);

            }

        },

        // do update for provided vms, then update the view layout

        update_vms: function(vms) {

            if (!this.visible() && !snf.config.update_hidden_views) { return };

            _.each(vms, _.bind(function(vm){

                // vm will be removed

                // no need to update

                if (vm.get("status") == "DELETED") {

                    return;

                }

                // this won't add it additional times

                this.add(vm);

                this.update_vm(vm);

            }, this))

            // update view stuff

            this.__update_layout();

        },

        // update ui for the given vm

        update_vm: function(vm) {

            // do not update deleted state vms

            if (!vm || vm.get("status") == 'DELETED') { return };

            this.check_vm_container(vm);

            this.update_details(vm);

            this.update_transition_state(vm);

            if (this.action_views) {

                this.action_views[vm.id].update();

                this.action_views[vm.id].update_layout();

            }

            try {

                this.post_update_vm(vm);

            } catch (err) {};

        },

        // check if vm is placed properly within the view

        // container (e.g. some views might have different

        // containers for terminated or running machines

        check_vm_container: function(vm){

            if (vm.state() == "DESTROY") { return };

            var el = this.vm(vm);

            if (!el.length) { return };

            var self = this;

            var selector = vm.is_active() ? 'vm_cont_active' : 'vm_cont_terminated';

            if (el.parent()[0] != this.sel(selector)[0]) {

                var cont = this.sel(selector);

                var self = this;

                el.hide().appendTo(cont).fadeIn(300);

                $(window).trigger('resize');

                //el.fadeOut(200, function() {

                    //el.appendTo(cont); 

                    //el.fadeIn(200);

                    //self.sel(selector).show(function(){

                        //$(window).trigger("resize");

                    //});

                //});

            }

        },

        __update_layout: function() {

            this.update_layout();

        },

        // append handlers for vm specific events

        __set_vm_handlers: function(vm) {

            // show transition on vm status transit

            vm.bind('transition', _.bind(function(){this.show_transition(vm)}, this));

            this.set_vm_handlers(vm);

        },

        // is vm in transition ??? show the progress spinner

        update_transition_state: function(vm) {

            if (vm.in_transition() && !vm.pending_action){

                this.sel('vm_spinner', vm.id).show();

            } else {

                this.sel('vm_spinner', vm.id).hide();

            }

        },

        show_indicator: function(vm, action) {

            var action = action || vm.pending_action;

            this.sel('vm_wave', vm.id).hide();

            this.sel('vm_spinner', vm.id).hide();

            this.vm(vm).find(".action-indicator").removeClass().addClass(action + " action-indicator").show();

        },

        hide_indicator: function(vm) {

            this.vm(vm).find(".action-indicator").removeClass().addClass("action-indicator").hide();

            this.update_transition_state(vm);

        },

        // display transition animations

        show_transition: function(vm) {

            var wave = this.sel('vm_wave', vm.id);

            if (!wave || !wave.length) { return }

            var src = wave.attr('src');

            // change src to force gif play from the first frame

            // animate for 500 ms then hide

            wave.attr('src', "").show();

            wave.attr('src', src).fadeIn(200).delay(700).fadeOut(300, function() {

                wave.hide();

            });

        },

        connect_to_console: function(vm) {

            vm.call("console", function(console_data) {

                var url = vm.get_console_url(console_data);

                snf.util.open_window(url, "VM_" + vm.get("id") + "_CONSOLE", {});

            })

        }

    });

    // empty message view (just a wrapper to the element containing 

    // the empty information message)

    views.EmptyView = views.View.extend({

        el: '#emptymachineslist'

    })

    views.VMActionsView = views.View.extend({

        initialize: function(vm, parent, el, hide) {

            this.hide = hide || false;

            this.view = parent;

            this.vm = vm;

            this.vm_el = el;

            this.el = $("#" + parent.view_id + "-actions-" + vm.id);

            this.all_action_names = _.keys(views.VMActionsView.STATUS_ACTIONS);

            // state params

            this.selected_action = false;

            _.bindAll(this);

            window.acts = this;

            this.view_id = "vm_" + vm.id + "_actions";

            views.VMActionsView.__super__.initialize.call(this);

            this.hovered = false;

            this.set_hover_handlers();

        },

        action: function(name) {

            return $(this.el).find(".action-container." + name);

        },

        action_link: function(name) {

            return this.action(name).find("a");

        },

        action_confirm_cont: function(name) {

            return this.action_confirm(name).parent();

        },

        action_confirm: function(name) {

            return this.action(name).find("button.yes");

        },

        action_cancel: function(name) {

            return this.action(name).find("button.no");

        },

        hide_actions: function() {

            $(this.el).find("a").css("visibility", "hidden");

        },

        // update the actions layout, depending on the selected actions

        update_layout: function() {

            if (!this.vm_handlers_initialized) {

                this.vm = storage.vms.get(this.vm.id);

                this.init_vm_handlers();

            }

            if (!this.vm) { return }

            if (!this.hovered && !this.vm.has_pending_action() && this.hide && !this.vm.action_error) { 

                this.el.hide();

                this.view.hide_indicator(this.vm);

                return 

            };

            if (!this.el.is(":visible") && !this.hide) { return };

            if (!this.handlers_initialized) { this.set_handlers(); }

            // update selected action

            if (this.vm.pending_action) {

                this.selected_action = this.vm.pending_action;

            } else {

                this.selected_action = false;

            }

            // vm actions tha can be performed

            var actions = this.vm.get_available_actions();

            // had pending action but actions changed and now selected action is

            // not available, hide it from user

            if (this.selected_action && actions.indexOf(this.selected_action) == -1) {

                this.reset();

            }

            this.el.show();

            if ((this.selected_action || this.hovered) && !this.vm.action_error) {

                // show selected action

                $(this.el).show();

                $(this.el).find("a").css("visibility", "visible");

                // show action icon

                this.view.show_indicator(this.vm);

            } else {

                if (this.hide || this.vm.action_error) {

                    // view shows actions on machine hover

                    $(this.el).find("a").css("visibility", "hidden");

                } else {

                    if (!this.vm.action_error) {

                        // view shows actions always

                        $(this.el).find("a").css("visibility", "visible");

                        $(this.el).show();

                    }

                }

                this.view.hide_indicator(this.vm);

            }

            // update action link styles and shit

            _.each(models.VM.ACTIONS, function(action, index) {

                if (actions.indexOf(action) > -1) {

                    this.action(action).removeClass("disabled");

                    if (this.selected_action == action) {

                        this.action_confirm_cont(action).css('display', 'block');

                        this.action_confirm(action).show();

                        this.action(action).removeClass("disabled");

                        this.action_link(action).addClass("selected");

                    } else {

                        this.action_confirm_cont(action).hide();

                        this.action_confirm(action).hide();

                        this.action_link(action).removeClass("selected");

                    }

                } else {

                    this.action().hide();

                    this.action(action).addClass("disabled");

                    this.action_confirm(action).hide();

                }

            }, this);

        },

        init_vm_handlers: function() {

            try {

                this.vm.unbind("action:fail", this.update_layout)

                this.vm.unbind("action:fail:reset", this.update_layout)

            } catch (err) { console.log("Error")};

            this.vm.bind("action:fail", this.update_layout)

            this.vm.bind("action:fail:reset", this.update_layout)

            this.vm_handlers_initialized = true;

        },

        set_hover_handlers: function() {

            // vm container hover (icon view)

            this.view.vm(this.vm).hover(_.bind(function() {

                this.hovered = true;

                this.update_layout();

            }, this),  _.bind(function() {

                this.hovered = false;

                this.update_layout();

            }, this));

        },

        // bind event handlers

        set_handlers: function() {

            var self = this;

            var vm = this.vm;

            // initial hide

            if (this.hide) { $(this.el).hide() };

            // action links events

            _.each(models.VM.ACTIONS, function(action) {

                var action = action;

                // indicator hovers

                this.view.vm(this.vm).find(".action-container."+action+" a").hover(function() {

                    self.view.show_indicator(self.vm, action);

                }, function() {

                    // clear or show selected action indicator

                    if (self.vm.pending_action) {

                        self.view.show_indicator(self.vm);

                    } else {

                        self.view.hide_indicator(self.vm);

                    }

                })

                // action links click events

                $(this.el).find(".action-container."+action+" a").click(function(ev) {

                    ev.preventDefault();

                    self.set(action);

                }).data("action", action);

                // confirms

                $(this.el).find(".action-container."+action+" button.no").click(function(ev) {

                    ev.preventDefault();

                    self.reset();

                });

                // cancels

                $(this.el).find(".action-container."+action+" button.yes").click(function(ev) {

                    ev.preventDefault();

                    // override console

                    // ui needs to act (open the console window)

                    if (action == "console") {

                        self.view.connect_to_console(self.vm);

                    } else {

                        self.vm.call(action);

                    }

                    self.reset();

                });

            }, this);

            this.handlers_initialized = true;

        },

        // reset actions

        reset: function() {

            var prev_action = this.selected_action;

            this.selected_action = false;

            this.vm.clear_pending_action();

            this.trigger("change", {'action': prev_action, 'vm': this.vm, 'view': this, remove: true});

            this.trigger("remove", {'action': prev_action, 'vm': this.vm, 'view': this, remove: true});

        },

        // set selected action

        set: function(action_name) {

            this.selected_action = action_name;

            this.vm.update_pending_action(this.selected_action);

            this.view.vm(this.vm).find(".action-indicator").show().removeClass().addClass(action_name + " action-indicator");

            this.trigger("change", {'action': this.selected_action, 'vm': this.vm, 'view': this});

        },

        update: function() {

        }

    })

    views.VMActionsView.STATUS_ACTIONS = { 

        'reboot':        ['UNKOWN', 'ACTIVE', 'REBOOT'],

        'shutdown':      ['UNKOWN', 'ACTIVE', 'REBOOT'],

        'console':       ['ACTIVE'],

        'start':         ['UNKOWN', 'STOPPED'],

        'destroy':       ['UNKOWN', 'ACTIVE', 'STOPPED', 'REBOOT', 'ERROR', 'BUILD']

    };

    // UI helpers

    var uihelpers = snf.ui.helpers = {};

    // OS icon helpers

    var os_icon = uihelpers.os_icon = function(os) {

        var icons = window.os_icons;

        if (!icons) { return "okeanos" }

        if (icons.indexOf(os) == -1) {

            os = "okeanos";

        }

        return os;

    }

    var os_icon_path = uihelpers.os_icon_path = function(os, size, active) {

        size = size || "small";

        if (active == undefined) { active = true };

        var icon = os_icon(os);

        if (active) {

            icon = icon + "-on";

        } else {

            icon = icon + "-off";

        }

        return (snf.config.machines_icons_url + "{0}/{1}.png").format(size, icon)

    }

    var os_icon_tag = uihelpers.os_icon_tag = function (os, size, active, attrs) {

        attrs = attrs || {};

        return '<img src="{0}" />'.format(os_icon_path(os, size, active));

    }

    // VM Icon helpers

    //

    // identify icon

    var vm_icon = uihelpers.vm_icon = function(vm) {

        return os_icon(vm.get_os());

    }

    // get icon url

    var vm_icon_path = uihelpers.vm_icon_path = function(vm, size) {

        return os_icon_path(vm.get_os(), size, vm.is_active());

    }

    // get icon IMG tag

    var vm_icon_tag = uihelpers.vm_icon_tag = function (vm, size, attrs) {

       return os_icon_tag(vm.get_os(), size, vm.is_active(), attrs);

    }

    snf.ui = _.extend(snf.ui, bb.Events);

    snf.ui.trigger_error = function(code, msg, error, extra) {

        snf.ui.trigger("error", { code:code, msg:msg, error:error, extra:extra || {} })

    };

})(this);