HLTech / judge-d-ui

import { select, Selection, event, BaseType } from 'd3-selection';

import { Simulation } from 'd3-force';

import { drag } from 'd3-drag';

import { zoom, zoomIdentity } from 'd3-zoom';

export type NodeSelection<T extends BaseType> = Selection<T, DependencyNode, Element, HTMLElement>;

export type LinkSelection = Selection<SVGPathElement, DependencyLink, SVGGElement, DependencyNode>;

export enum Colors {

    PROVIDER = '#00BFC2',

    CONSUMER = '#039881',

    PROVIDER_CONSUMER = '#03939F',

    DEFAULT = '#dcdee0',

}

export function getLabelTextDimensions(node: Node) {

    const textNode = select<SVGGElement, DependencyNode>(node.previousSibling as SVGGElement).node();

    if (!textNode) {

        return undefined;

    }

    return textNode.getBBox();

}

export function getNodeDimensions(selectedNode: DependencyNode): { width: number; height: number } {

    const foundNode = select<SVGGElement, DependencyNode>('#labels')

        .selectAll<SVGGElement, DependencyNode>('g')

        .filter((node: DependencyNode) => node.x === selectedNode.x && node.y === selectedNode.y)

        .node();

    return foundNode ? foundNode.getBBox() : { width: 200, height: 25 };

}

export function findMaxDependencyLevel(labelNodesGroup: NodeSelection<SVGGElement>) {

    return Math.max(

        ...labelNodesGroup

            .selectAll<HTMLElement, DependencyNode>('g')

            .filter((node: DependencyNode) => node.level > 0)

            .data()

            .map((node: DependencyNode) => node.level)

    );

}

export function highlight(clickedNode: DependencyNode, linkNodes: LinkSelection) {

    const linksData = linkNodes.data();

    const labelNodes = selectAllNodes();

    const visitedNodes = setDependencyLevelOnEachNode(clickedNode, labelNodes.data());

    if (visitedNodes.length === 1) {

        return;

    }

    labelNodes.each(function(this: SVGGElement, node: DependencyNode) {

        const areNodesDirectlyConnected = areNodesConnected(clickedNode, node, linksData);

        const labelElement = this.firstElementChild;

        const textElement = this.lastElementChild;

        if (!labelElement || !textElement) {

            return;

        }

        if (areNodesDirectlyConnected) {

            select<Element, DependencyNode>(labelElement).attr('fill', getHighLightedLabelColor);

            select<Element, DependencyNode>(textElement).style('fill', 'white');

        } else {

            select<Element, DependencyNode>(labelElement).attr('fill', Colors.DEFAULT);

            select<Element, DependencyNode>(textElement).style('fill', 'black');

        }

    });

}

export function selectHighLightedNodes() {

    return selectAllNodes().filter(function(this: SVGGElement) {

        return this.firstElementChild ? this.firstElementChild.getAttribute('fill') !== Colors.DEFAULT : false;

    });

}

export function selectAllNodes() {

    return select('#labels').selectAll<SVGGElement, DependencyNode>('g');

}

export function zoomToHighLightedNodes() {

    const highlightedNodes = selectHighLightedNodes();

    const svgContainer = select('#container');

    const svgContainerNode = select<SVGSVGElement, DependencyNode>('#container').node();

    const dim = findGroupBackgroundDimension(highlightedNodes.data());

    if (!svgContainerNode || !dim) {

        return;

    }

    const width = Number(svgContainerNode.getAttribute('width'));

    const height = Number(svgContainerNode.getAttribute('height'));

    const scaleValue = Math.min(8, 0.9 / Math.max(dim.width / width, dim.height / height));

    svgContainer

        .transition()

        .duration(750)

        .call(

            zoom<any, any>().on('zoom', zoomed).transform,

            zoomIdentity

                .translate(width / 2, height / 2)

                .scale(scaleValue)

                .translate(-dim.x - dim.width / 2 - 250, -dim.y - dim.height / 2)

        );

}

export function setDependencyLevelOnEachNode(clickedNode: DependencyNode, nodes: DependencyNode[]): DependencyNode[] {

    nodes.forEach((node: DependencyNode) => (node.level = 0));

    const visitedNodes: DependencyNode[] = [];

    const nodesToVisit: DependencyNode[] = [];

    nodesToVisit.push({ ...clickedNode, level: 1 });

    while (nodesToVisit.length > 0) {

        const currentNode = nodesToVisit.shift();

        if (!currentNode) {

            return [];

        }

        currentNode.links.forEach((node: DependencyNode) => {

            if (!contains(visitedNodes, node) && !contains(nodesToVisit, node)) {

                node.level = currentNode.level + 1;

                nodesToVisit.push({ ...node, level: currentNode.level + 1 });

            }

        });

        visitedNodes.push(currentNode);

    }

    return visitedNodes;

}

function contains(arr: DependencyNode[], node: DependencyNode) {

    return arr.findIndex((el: DependencyNode) => Boolean(el.name === node.name && el.version === node.version)) > -1;

}

export function areNodesConnected(a: DependencyNode, b: DependencyNode, links: DependencyLink[]) {

    return (

        a.index === b.index ||

        links.some(

            link =>

                (link.source.index === a.index && link.target.index === b.index) ||

                (link.source.index === b.index && link.target.index === a.index)

        )

    );

}

export function getHighLightedLabelColor(node: DependencyNode) {

    const { isConsumer, isProvider } = node;

    if (isConsumer && isProvider) {

        return Colors.PROVIDER_CONSUMER;

    }

    if (isProvider) {

        return Colors.PROVIDER;

    }

    if (isConsumer) {

        return Colors.CONSUMER;

    }

    return Colors.DEFAULT;

}

export function handleDrag(simulation: Simulation<DependencyNode, DependencyLink>) {

    return drag<SVGGElement, DependencyNode>()

        .on('start', (node: DependencyNode) => dragStarted(node, simulation))

        .on('drag', dragged)

        .on('end', (node: DependencyNode) => dragEnded(node, simulation));

}

function dragStarted(node: DependencyNode, simulation: Simulation<DependencyNode, DependencyLink>) {

    if (!event.active) {

        simulation.alphaTarget(0.3).restart();

    }

    node.fx = node.x;

    node.fy = node.y;

}

function dragged(node: DependencyNode) {

    node.fx = event.x;

    node.fy = event.y;

}

function dragEnded(node: DependencyNode, simulation: Simulation<DependencyNode, DependencyLink>) {

    if (!event.active) {

        simulation.alphaTarget(0);

    }

    node.fx = null;

    node.fy = null;

}

export function zoomed() {

    const { transform } = event;

    const zoomLayer = select('#zoom');

    zoomLayer.attr('transform', transform);

    zoomLayer.attr('stroke-width', 1 / transform.k);

}

}

export function setResetViewHandler() {

    LevelStorage.reset();

    const svgContainer = select('#container');

    const zoomLayer = select('#zoom');

    svgContainer.on('dblclick', () => {

        selectAllNodes().each((node: DependencyNode) => (node.level = 0));

        selectHighLightedNodes()

            .each(function(this: SVGGElement) {

                const labelElement = this.firstElementChild;

                const textElement = this.lastElementChild;

                if (!labelElement || !textElement) {

                    return;

                }

                select<Element, DependencyNode>(labelElement).attr('fill', Colors.DEFAULT);

                select<Element, DependencyNode>(textElement).style('fill', 'black');

            })

            .attr('fill', Colors.DEFAULT);

        svgContainer

            .transition()

            .duration(750)

            .call(zoom<any, any>().on('zoom', () => zoomLayer.attr('transform', event.transform)).transform, zoomIdentity);

    });

}

export class LevelStorage {

    private static level: number = 1;

    public static getLevel(): number {

        return this.level;

    }

    public static increase() {

        this.level = this.level + 1;

    }

    public static decrease() {

        this.level = this.level - 1;

    }

    public static reset() {

        this.level = 1;

    }

}