brotherton-erpnext/erpnext/public/js/hierarchy_chart/hierarchy_chart_desktop.js

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import html2canvas from 'html2canvas';
erpnext.HierarchyChart = class {
/* Options:
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- doctype
- wrapper: wrapper for the hierarchy view
- method:
- to get the data for each node
- this method should return id, name, title, image, and connections for each node
*/
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constructor(doctype, wrapper, method) {
this.page = wrapper.page;
this.method = method;
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this.doctype = doctype;
this.setup_page_style();
this.page.main.addClass('frappe-card');
this.nodes = {};
this.setup_node_class();
}
setup_page_style() {
this.page.main.css({
'min-height': '300px',
'max-height': '600px',
'overflow': 'auto',
'position': 'relative'
});
}
setup_node_class() {
let me = this;
this.Node = class {
constructor({
id, parent, parent_id, image, name, title, expandable, connections, is_root // eslint-disable-line
}) {
// to setup values passed via constructor
$.extend(this, arguments[0]);
this.expanded = 0;
me.nodes[this.id] = this;
me.make_node_element(this);
if (!me.all_nodes_expanded) {
me.setup_node_click_action(this);
}
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me.setup_edit_node_action(this);
}
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};
}
make_node_element(node) {
let node_card = frappe.render_template('node_card', {
id: node.id,
name: node.name,
title: node.title,
image: node.image,
parent: node.parent_id,
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connections: node.connections,
is_mobile: false
});
node.parent.append(node_card);
node.$link = $(`#${node.id}`);
}
show() {
frappe.breadcrumbs.add('HR');
this.setup_actions();
if ($(`[data-fieldname="company"]`).length) return;
let me = this;
let company = this.page.add_field({
fieldtype: 'Link',
options: 'Company',
fieldname: 'company',
placeholder: __('Select Company'),
default: frappe.defaults.get_default('company'),
only_select: true,
reqd: 1,
change: () => {
me.company = undefined;
if (company.get_value() && me.company != company.get_value()) {
me.company = company.get_value();
// svg for connectors
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me.make_svg_markers();
me.setup_hierarchy();
me.render_root_nodes();
me.all_nodes_expanded = false;
}
}
});
company.refresh();
$(`[data-fieldname="company"]`).trigger('change');
$(`[data-fieldname="company"] .link-field`).css('z-index', 2);
}
setup_actions() {
let me = this;
this.page.clear_inner_toolbar();
this.page.add_inner_button(__('Export'), function() {
me.export_chart();
});
this.page.add_inner_button(__('Expand All'), function() {
me.load_children(me.root_node, true);
me.all_nodes_expanded = true;
me.page.remove_inner_button(__('Expand All'));
me.page.add_inner_button(__('Collapse All'), function() {
me.setup_hierarchy();
me.render_root_nodes();
me.all_nodes_expanded = false;
me.page.remove_inner_button(__('Collapse All'));
me.setup_actions();
});
});
}
export_chart() {
frappe.dom.freeze(__('Exporting...'));
this.page.main.css({
'min-height': '',
'max-height': '',
'overflow': 'visible',
'position': 'fixed',
'left': '0',
'top': '0'
});
$('.node-card').addClass('exported');
html2canvas(document.querySelector('#hierarchy-chart-wrapper'), {
scrollY: -window.scrollY,
scrollX: 0
}).then(function(canvas) {
// Export the canvas to its data URI representation
let dataURL = canvas.toDataURL('image/png');
// download the image
let a = document.createElement('a');
a.href = dataURL;
a.download = 'hierarchy_chart';
a.click();
}).finally(() => {
frappe.dom.unfreeze();
});
this.setup_page_style();
$('.node-card').removeClass('exported');
}
setup_hierarchy() {
if (this.$hierarchy)
this.$hierarchy.remove();
$(`#connectors`).empty();
// setup hierarchy
this.$hierarchy = $(
`<ul class="hierarchy">
<li class="root-level level">
<ul class="node-children"></ul>
</li>
</ul>`);
this.page.main
.find('#hierarchy-chart-wrapper')
.append(this.$hierarchy);
this.nodes = {};
this.all_nodes_expanded = false;
}
make_svg_markers() {
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$('#hierarchy-chart-wrapper').remove();
this.page.main.append(`
<div id="hierarchy-chart-wrapper">
<svg id="arrows" width="100%" height="100%">
<defs>
<marker id="arrowhead-active" viewBox="0 0 10 10" refX="3" refY="5" markerWidth="6" markerHeight="6" orient="auto" fill="var(--blue-500)">
<path d="M 0 0 L 10 5 L 0 10 z"></path>
</marker>
<marker id="arrowhead-collapsed" viewBox="0 0 10 10" refX="3" refY="5" markerWidth="6" markerHeight="6" orient="auto" fill="var(--blue-300)">
<path d="M 0 0 L 10 5 L 0 10 z"></path>
</marker>
<marker id="arrowstart-active" viewBox="0 0 10 10" refX="3" refY="5" markerWidth="8" markerHeight="8" orient="auto" fill="var(--blue-500)">
<circle cx="4" cy="4" r="3.5" fill="white" stroke="var(--blue-500)"/>
</marker>
<marker id="arrowstart-collapsed" viewBox="0 0 10 10" refX="3" refY="5" markerWidth="8" markerHeight="8" orient="auto" fill="var(--blue-300)">
<circle cx="4" cy="4" r="3.5" fill="white" stroke="var(--blue-300)"/>
</marker>
</defs>
<g id="connectors" fill="none">
</g>
</svg>
</div>`);
}
render_root_nodes(expanded_view=false) {
let me = this;
return frappe.call({
method: me.method,
args: {
company: me.company
}
}).then(r => {
if (r.message.length) {
let expand_node = undefined;
let node = undefined;
$.each(r.message, (i, data) => {
node = new me.Node({
id: data.id,
parent: $('<li class="child-node"></li>').appendTo(me.$hierarchy.find('.node-children')),
parent_id: undefined,
image: data.image,
name: data.name,
title: data.title,
expandable: true,
connections: data.connections,
is_root: true
});
if (!expand_node && data.connections)
expand_node = node;
});
me.root_node = expand_node;
if (!expanded_view) {
me.expand_node(expand_node);
}
}
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});
}
expand_node(node) {
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const is_sibling = this.selected_node && this.selected_node.parent_id === node.parent_id;
this.set_selected_node(node);
this.show_active_path(node);
this.collapse_previous_level_nodes(node);
// since the previous node collapses, all connections to that node need to be rebuilt
// if a sibling node is clicked, connections don't need to be rebuilt
if (!is_sibling) {
// rebuild outgoing connections
this.refresh_connectors(node.parent_id);
// rebuild incoming connections
let grandparent = $(`#${node.parent_id}`).attr('data-parent');
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this.refresh_connectors(grandparent);
}
if (node.expandable && !node.expanded) {
return this.load_children(node);
}
}
collapse_node() {
if (this.selected_node.expandable) {
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this.selected_node.$children.hide();
$(`path[data-parent="${this.selected_node.id}"]`).hide();
this.selected_node.expanded = false;
}
}
show_active_path(node) {
// mark node parent on active path
$(`#${node.parent_id}`).addClass('active-path');
}
load_children(node, deep=false) {
if (!deep) {
frappe.run_serially([
() => this.get_child_nodes(node.id),
(child_nodes) => this.render_child_nodes(node, child_nodes)
]);
} else {
frappe.run_serially([
() => frappe.dom.freeze(),
() => this.setup_hierarchy(),
() => this.render_root_nodes(true),
() => this.get_all_nodes(node.id, node.name),
(data_list) => this.render_children_of_all_nodes(data_list),
() => frappe.dom.unfreeze()
]);
}
}
get_child_nodes(node_id) {
return new Promise(resolve => {
frappe.call({
method: this.method,
args: {
parent: node_id,
company: this.company
}
}).then(r => resolve(r.message));
});
}
render_child_nodes(node, child_nodes) {
const last_level = this.$hierarchy.find('.level:last').index();
const current_level = $(`#${node.id}`).parent().parent().parent().index();
if (last_level === current_level) {
this.$hierarchy.append(`
<li class="level"></li>
`);
}
if (!node.$children) {
node.$children = $('<ul class="node-children"></ul>')
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.hide()
.appendTo(this.$hierarchy.find('.level:last'));
node.$children.empty();
if (child_nodes) {
$.each(child_nodes, (_i, data) => {
this.add_node(node, data);
setTimeout(() => {
this.add_connector(node.id, data.id);
}, 250);
});
}
}
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node.$children.show();
$(`path[data-parent="${node.id}"]`).show();
node.expanded = true;
}
get_all_nodes(node_id, node_name) {
return new Promise(resolve => {
frappe.call({
method: 'erpnext.utilities.hierarchy_chart.get_all_nodes',
args: {
method: this.method,
company: this.company,
parent: node_id,
parent_name: node_name
},
callback: (r) => {
resolve(r.message);
}
});
});
}
render_children_of_all_nodes(data_list) {
let entry = undefined;
let node = undefined;
while (data_list.length) {
// to avoid overlapping connectors
entry = data_list.shift();
node = this.nodes[entry.parent];
if (node) {
this.render_child_nodes_for_expanded_view(node, entry.data);
} else if (data_list.length) {
data_list.push(entry);
}
}
}
render_child_nodes_for_expanded_view(node, child_nodes) {
node.$children = $('<ul class="node-children"></ul>');
const last_level = this.$hierarchy.find('.level:last').index();
const node_level = $(`#${node.id}`).parent().parent().parent().index();
if (last_level === node_level) {
this.$hierarchy.append(`
<li class="level"></li>
`);
node.$children.appendTo(this.$hierarchy.find('.level:last'));
} else {
node.$children.appendTo(this.$hierarchy.find('.level:eq(' + (node_level + 1) + ')'));
}
node.$children.hide().empty();
if (child_nodes) {
$.each(child_nodes, (_i, data) => {
this.add_node(node, data);
setTimeout(() => {
this.add_connector(node.id, data.id);
}, 250);
});
}
node.$children.show();
$(`path[data-parent="${node.id}"]`).show();
node.expanded = true;
}
add_node(node, data) {
return new this.Node({
id: data.id,
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parent: $('<li class="child-node"></li>').appendTo(node.$children),
parent_id: node.id,
image: data.image,
name: data.name,
title: data.title,
expandable: data.expandable,
connections: data.connections,
children: undefined
});
}
add_connector(parent_id, child_id) {
// using pure javascript for better performance
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const parent_node = document.querySelector(`#${parent_id}`);
const child_node = document.querySelector(`#${child_id}`);
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let path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
// we need to connect right side of the parent to the left side of the child node
const pos_parent_right = {
x: parent_node.offsetLeft + parent_node.offsetWidth,
y: parent_node.offsetTop + parent_node.offsetHeight / 2
};
const pos_child_left = {
x: child_node.offsetLeft - 5,
y: child_node.offsetTop + child_node.offsetHeight / 2
};
const connector = this.get_connector(pos_parent_right, pos_child_left);
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path.setAttribute('d', connector);
this.set_path_attributes(path, parent_id, child_id);
document.getElementById('connectors').appendChild(path);
}
get_connector(pos_parent_right, pos_child_left) {
if (pos_parent_right.y === pos_child_left.y) {
// don't add arcs if it's a straight line
return "M" +
(pos_parent_right.x) + "," + (pos_parent_right.y) + " " +
"L"+
(pos_child_left.x) + "," + (pos_child_left.y);
} else {
let arc_1 = "";
let arc_2 = "";
let offset = 0;
if (pos_parent_right.y > pos_child_left.y) {
// if child is above parent on Y axis 1st arc is anticlocwise
// second arc is clockwise
arc_1 = "a10,10 1 0 0 10,-10 ";
arc_2 = "a10,10 0 0 1 10,-10 ";
offset = 10;
} else {
// if child is below parent on Y axis 1st arc is clockwise
// second arc is anticlockwise
arc_1 = "a10,10 0 0 1 10,10 ";
arc_2 = "a10,10 1 0 0 10,10 ";
offset = -10;
}
return "M" + (pos_parent_right.x) + "," + (pos_parent_right.y) + " " +
"L" +
(pos_parent_right.x + 40) + "," + (pos_parent_right.y) + " " +
arc_1 +
"L" +
(pos_parent_right.x + 50) + "," + (pos_child_left.y + offset) + " " +
arc_2 +
"L"+
(pos_child_left.x) + "," + (pos_child_left.y);
}
}
set_path_attributes(path, parent_id, child_id) {
path.setAttribute("data-parent", parent_id);
path.setAttribute("data-child", child_id);
const parent = $(`#${parent_id}`);
if (parent.hasClass('active')) {
path.setAttribute("class", "active-connector");
path.setAttribute("marker-start", "url(#arrowstart-active)");
path.setAttribute("marker-end", "url(#arrowhead-active)");
} else {
path.setAttribute("class", "collapsed-connector");
path.setAttribute("marker-start", "url(#arrowstart-collapsed)");
path.setAttribute("marker-end", "url(#arrowhead-collapsed)");
}
}
set_selected_node(node) {
// remove active class from the current node
if (this.selected_node)
this.selected_node.$link.removeClass('active');
// add active class to the newly selected node
this.selected_node = node;
node.$link.addClass('active');
}
collapse_previous_level_nodes(node) {
let node_parent = $(`#${node.parent_id}`);
let previous_level_nodes = node_parent.parent().parent().children('li');
let node_card = undefined;
previous_level_nodes.each(function() {
node_card = $(this).find('.node-card');
if (!node_card.hasClass('active-path')) {
node_card.addClass('collapsed');
}
});
}
refresh_connectors(node_parent) {
if (!node_parent) return;
$(`path[data-parent="${node_parent}"]`).remove();
frappe.run_serially([
() => this.get_child_nodes(node_parent),
(child_nodes) => {
if (child_nodes) {
$.each(child_nodes, (_i, data) => {
this.add_connector(node_parent, data.id);
});
}
}
]);
}
setup_node_click_action(node) {
let me = this;
let node_element = $(`#${node.id}`);
node_element.click(function() {
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const is_sibling = me.selected_node.parent_id === node.parent_id;
if (is_sibling) {
me.collapse_node();
} else if (node_element.is(':visible')
&& (node_element.hasClass('collapsed') || node_element.hasClass('active-path'))) {
me.remove_levels_after_node(node);
me.remove_orphaned_connectors();
}
me.expand_node(node);
});
}
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setup_edit_node_action(node) {
let node_element = $(`#${node.id}`);
let me = this;
node_element.find('.btn-edit-node').click(function() {
frappe.set_route('Form', me.doctype, node.id);
});
}
remove_levels_after_node(node) {
let level = $(`#${node.id}`).parent().parent().parent().index();
level = $('.hierarchy > li:eq('+ level + ')');
level.nextAll('li').remove();
let nodes = level.find('.node-card');
let node_object = undefined;
$.each(nodes, (_i, element) => {
node_object = this.nodes[element.id];
node_object.expanded = 0;
node_object.$children = undefined;
});
nodes.removeClass('collapsed active-path');
}
remove_orphaned_connectors() {
let paths = $('#connectors > path');
$.each(paths, (_i, path) => {
const parent = $(path).data('parent');
const child = $(path).data('child');
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if ($(`#${parent}`).length && $(`#${child}`).length)
return;
$(path).remove();
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});
}
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};