Move JS to external file

This is mostly a proof of concept to move all JS to external
files to pave the way for future re-architecting

Change-Id: I3b6f00bff7325b85a75d37f554892fa5283d9f4b
Signed-off-by: Parker Berberian <pberberian@iol.unh.edu>

1 files changed, 244 insertions, 0 deletions

diff --git a/src/static/js/dashboard.js b/src/static/js/dashboard.js
new file mode 100644
index 0000000..66e95d0
--- /dev/null
+++ b/src/static/js/dashboard.js
@@ -0,0 +1,244 @@
+class MultipleSelectFilterWidget {
+
+    constructor(neighbors, items, initial) {
+        this.inputs = [];
+        this.graph_neighbors = neighbors;
+        this.filter_items = items;
+        this.result = {};
+        this.dropdown_count = 0;
+
+        for(let nodeId in this.filter_items) {
+            const node = this.filter_items[nodeId];
+            this.result[node.class] = {}
+        }
+
+        this.make_selection(initial);
+    }
+
+    make_selection( initial_data ){
+        if(!initial_data || jQuery.isEmptyObject(initial_data))
+            return;
+        for(let item_class in initial_data) {
+            const selected_items = initial_data[item_class];
+            for( let node_id in selected_items ){
+                const node = this.filter_items[node_id];
+                const selection_data = selected_items[node_id]
+                if( selection_data.selected ) {
+                    this.select(node);
+                    this.markAndSweep(node);
+                    this.updateResult(node);
+                }
+                if(node['multiple']){
+                    this.make_multiple_selection(node, selection_data);
+                }
+            }
+        }
+    }
+
+    make_multiple_selection(node, selection_data){
+        const prepop_data = selection_data.values;
+        for(let k in prepop_data){
+            const div = this.add_item_prepopulate(node, prepop_data[k]);
+            this.updateObjectResult(node, div.id, prepop_data[k]);
+        }
+    }
+
+    markAndSweep(root){
+        for(let i in this.filter_items) {
+            const node = this.filter_items[i];
+            node['marked'] = true; //mark all nodes
+        }
+
+        const toCheck = [root];
+        while(toCheck.length > 0){
+            const node = toCheck.pop();
+            if(!node['marked']) {
+                continue; //already visited, just continue
+            }
+            node['marked'] = false; //mark as visited
+            if(node['follow'] || node == root){ //add neighbors if we want to follow this node
+                const neighbors = this.graph_neighbors[node.id];
+                for(let neighId of neighbors) {
+                    const neighbor = this.filter_items[neighId];
+                    toCheck.push(neighbor);
+                }
+            }
+        }
+
+        //now remove all nodes still marked
+        for(let i in this.filter_items){
+            const node = this.filter_items[i];
+            if(node['marked']){
+                this.disable_node(node);
+            }
+        }
+    }
+
+    process(node) {
+        if(node['selected']) {
+            this.markAndSweep(node);
+        }
+        else {  //TODO: make this not dumb
+            const selected = []
+            //remember the currently selected, then reset everything and reselect one at a time
+            for(let nodeId in this.filter_items) {
+                node = this.filter_items[nodeId];
+                if(node['selected']) {
+                    selected.push(node);
+                }
+                this.clear(node);
+            }
+            for(let node of selected) {
+                this.select(node);
+                this.markAndSweep(selected[i]);
+            }
+        }
+    }
+
+    select(node) {
+        const elem = document.getElementById(node['id']);
+        node['selected'] = true;
+        elem.classList.remove('disabled_node', 'cleared_node');
+        elem.classList.add('selected_node');
+    }
+
+    clear(node) {
+        const elem = document.getElementById(node['id']);
+        node['selected'] = false;
+        node['selectable'] = true;
+        elem.classList.add('cleared_node')
+        elem.classList.remove('disabled_node', 'selected_node');
+    }
+
+    disable_node(node) {
+        const elem = document.getElementById(node['id']);
+        node['selected'] = false;
+        node['selectable'] = false;
+        elem.classList.remove('cleared_node', 'selected_node');
+        elem.classList.add('disabled_node');
+    }
+
+    processClick(id){
+        const node = this.filter_items[id];
+        if(!node['selectable'])
+            return;
+
+        if(node['multiple']){
+            return this.processClickMultiple(node);
+        } else {
+            return this.processClickSingle(node);
+        }
+    }
+
+    processClickSingle(node){
+        node['selected'] = !node['selected']; //toggle on click
+        if(node['selected']) {
+            this.select(node);
+        } else {
+            this.clear(node);
+        }
+        this.process(node);
+        this.updateResult(node);
+    }
+
+    processClickMultiple(node){
+        this.select(node);
+        const div = this.add_item_prepopulate(node, false);
+        this.process(node);
+        this.updateObjectResult(node, div.id, "");
+    }
+
+    restrictchars(input){
+        if( input.validity.patternMismatch ){
+            input.setCustomValidity("Only alphanumeric characters (a-z, A-Z, 0-9), underscore(_), and hyphen (-) are allowed");
+            input.reportValidity();
+        }
+        input.value = input.value.replace(/([^A-Za-z0-9-_.])+/g, "");
+        this.checkunique(input);
+    }
+
+    checkunique(tocheck){ //TODO: use set
+        const val = tocheck.value;
+        for( let input of this.inputs ){
+            if( input.value == val && input != tocheck){
+                tocheck.setCustomValidity("All hostnames must be unique");
+                tocheck.reportValidity();
+                return;
+            }
+        }
+        tocheck.setCustomValidity("");
+    }
+
+    make_remove_button(div, node){
+        const button = document.createElement("BUTTON");
+        button.type = "button";
+        button.appendChild(document.createTextNode("Remove"));
+        button.classList.add("btn", "btn-danger");
+        const that = this;
+        button.onclick = function(){ that.remove_dropdown(div.id, node.id); }
+        return button;
+    }
+
+    make_input(div, node, prepopulate){
+        const input = document.createElement("INPUT");
+        input.type = node.form.type;
+        input.name = node.id + node.form.name
+        input.pattern = "(?=^.{1,253}$)(^([A-Za-z0-9-_]{1,62}\.)*[A-Za-z0-9-_]{1,63})";
+        input.title = "Only alphanumeric characters (a-z, A-Z, 0-9), underscore(_), and hyphen (-) are allowed"
+        input.placeholder = node.form.placeholder;
+        this.inputs.push(input);
+        const that = this;
+        input.onchange = function() { that.updateObjectResult(node, div.id, input.value); that.restrictchars(this); };
+        input.oninput = function() { that.restrictchars(this); };
+        if(prepopulate)
+            input.value = prepopulate;
+        return input;
+    }
+
+    add_item_prepopulate(node, prepopulate){
+        const div = document.createElement("DIV");
+        div.id = "dropdown_" + this.dropdown_count;
+        div.classList.add("dropdown_item");
+        this.dropdown_count++;
+        const label = document.createElement("H5")
+        label.appendChild(document.createTextNode(node['name']))
+        div.appendChild(label);
+        div.appendChild(this.make_input(div, node, prepopulate));
+        div.appendChild(this.make_remove_button(div, node));
+        document.getElementById("dropdown_wrapper").appendChild(div);
+        return div;
+    }
+
+    remove_dropdown(div_id, node_id){
+        const div = document.getElementById(div_id);
+        const node = this.filter_items[node_id]
+        const parent = div.parentNode;
+        div.parentNode.removeChild(div);
+        delete this.result[node.class][node.id]['values'][div.id];
+
+        //checks if we have removed last item in class
+        if(jQuery.isEmptyObject(this.result[node.class][node.id]['values'])){
+            delete this.result[node.class][node.id];
+            this.clear(node);
+        }
+    }
+
+    updateResult(node){
+        if(!node['multiple']){
+            this.result[node.class][node.id] = {selected: node.selected, id: node.model_id}
+            if(!node.selected)
+                delete this.result[node.class][node.id];
+        }
+    }
+
+    updateObjectResult(node, childKey, childValue){
+        if(!this.result[node.class][node.id])
+            this.result[node.class][node.id] = {selected: true, id: node.model_id, values: {}}
+
+        this.result[node.class][node.id]['values'][childKey] = childValue;
+    }
+
+    finish(){
+        document.getElementById("filter_field").value = JSON.stringify(this.result);
+    }
+}