144 lines
3.9 KiB
JavaScript
144 lines
3.9 KiB
JavaScript
import { OHIF } from 'meteor/ohif:core';
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import { _ } from 'meteor/underscore';
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OHIF.ui.unsavedChanges = (function() {
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const rootTree = {};
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function createNode(name, hasChildren) {
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let node = { name };
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if (hasChildren) {
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node.type = 'tree';
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node.children = {};
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} else {
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node.type = 'leaf';
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node.value = 1;
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}
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return node;
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}
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function addNode(tree, path) {
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let node,
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result = false,
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name = path.shift();
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if (name !== '*') { // "*" is a special name which means "all children"
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if (name in tree) {
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node = tree[name];
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if (path.length > 0) {
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result = node.type === 'tree' && addNode(node.children, path);
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} else if (node.type === 'leaf') {
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node.value++;
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result = true;
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}
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} else {
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node = createNode(name, path.length > 0);
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if (node.type !== 'tree' || addNode(node.children, path)) {
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tree[name] = node;
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result = true;
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}
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}
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}
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return result;
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}
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function removeNode(tree, path) {
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let result = false,
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name = path.shift();
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if (name === '*') {
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for (name in tree) {
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if (tree.hasOwnProperty(name)) {
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delete tree[name];
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}
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}
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result = true;
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} else if (name in tree) {
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if (path.length === 0) {
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delete tree[name];
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result = true;
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} else {
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let node = tree[name];
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if (node.type === 'tree') {
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result = removeNode(node.children, path);
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}
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}
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}
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return result;
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}
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function probeNode(tree, path) {
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let node,
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result = 0,
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name = path.shift();
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if (name === '*') {
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for (name in tree) {
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if (tree.hasOwnProperty(name)) {
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node = tree[name];
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if (node.type === 'leaf') {
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result += node.value;
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} else {
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path.unshift('*');
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result += probeNode(node.children, path);
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}
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}
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}
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} else if (name in tree) {
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node = tree[name];
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if (node.type === 'tree') {
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if (path.length === 0) {
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path.unshift('*');
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}
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result = probeNode(node.children, path);
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} else {
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result = path.length === 0 ? node.value : 0;
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}
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}
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return result;
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}
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// return the exposed interface of UnsavedChanges object
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return {
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set: function(name) {
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return typeof name === 'string' ? addNode(rootTree, name.split('.')) : false;
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},
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clear: function(name) {
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return typeof name === 'string' ? removeNode(rootTree, name.split('.')) : false;
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},
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probe: function(name) {
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return typeof name === 'string' ? probeNode(rootTree, name.split('.')) : 0;
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},
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check: function(name, options) {
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return new Promise((resolve, reject) => {
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let probe = this.probe(name);
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if (probe > 0) {
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let dialogOptions = _.extend({
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title: 'You have unsaved changes!',
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message: "Your changes will be lost if you don't save them... Are you sure you want to proceed?"
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}, options);
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OHIF.ui.showFormDialog('dialogConfirm', dialogOptions).then(resolve, reject);
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} else {
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resolve();
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}
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});
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}
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};
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}());
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