Add CytoGraph component to re-present the graph

.eslintrc.json

@@ -0,0 +1,3 @@
+{
+  "extends": "next/core-web-vitals"
+}

components/Graph.js

@@ -0,0 +1,125 @@
+import React, {useEffect, useRef, useState} from 'react';
+import CytoscapeComponent from "react-cytoscapejs";
+
+const layout = {
+    name: "breadthfirst",
+    fit: true,
+    circle: true,
+    directed: true,
+    padding: 50,
+    spacingFactor: 1.5,
+    animate: true,
+    // animationDuration: 300,
+    avoidOverlap: false,
+    nodeDimensionsIncludeLabels: true
+};
+
+const styleSheet = [
+    {
+        selector: "node",
+        style: {
+            backgroundColor: "#4a56a6",
+            width: 10,
+            height: 10,
+            label: "data(label)",
+
+            // "width": "mapData(score, 0, 0.006769776522008331, 20, 60)",
+            // "height": "mapData(score, 0, 0.006769776522008331, 20, 60)",
+            // "text-valign": "center",
+            // "text-halign": "center",
+            "overlay-padding": "6px",
+            "z-index": "10",
+            //text props
+            "text-outline-color": "#4a56a6",
+            "text-outline-width": "1px",
+            color: "red",
+            fontSize: 20
+        }
+    },
+    {
+        selector: "node:selected",
+        style: {
+            "border-width": "6px",
+            "border-color": "#AAD8FF",
+            "border-opacity": "0.5",
+            "background-color": "#77828C",
+            width: 50,
+            height: 50,
+            //text props
+            "text-outline-color": "#77828C",
+            "text-outline-width": 1
+        }
+    },
+    {
+        selector: "node[type='device']",
+        style: {
+            shape: "square"
+        }
+    },
+    {
+        selector: "edge",
+        style: {
+            width: 3,
+            // "line-color": "#6774cb",
+            "line-color": "#AAD8FF",
+            "target-arrow-color": "#6774cb",
+            "target-arrow-shape": "triangle",
+            "curve-style": "bezier"
+        }
+    }
+];
+
+
+
+function Graph({graph}) {
+    const [width, setWith] = useState("100%");
+    const [height, setHeight] = useState("400px");
+    const [graphData, setGraphData] = useState({
+        nodes: graph.nodes,
+        edges: graph.edges
+    });
+
+    let myCyRef;
+
+    return (
+        <>
+            <div>
+                <h1>Cytoscape example</h1>
+                <div
+                    style={{
+                        border: "1px solid",
+                        backgroundColor: "#f5f6fe"
+                    }}
+                >
+                    <CytoscapeComponent
+                        elements={CytoscapeComponent.normalizeElements(graphData)}
+                        // pan={{ x: 200, y: 200 }}
+                        style={{ width: width, height: height }}
+                        zoomingEnabled={true}
+                        maxZoom={2}
+                        minZoom={0.5}
+                        autounselectify={false}
+                        boxSelectionEnabled={true}
+                        layout={layout}
+                        stylesheet={styleSheet}
+                        cy={cy => {
+                            myCyRef = cy;
+
+                            console.log("EVT", cy);
+
+                            cy.on("tap", "node", evt => {
+                                var node = evt.target;
+                                console.log("EVT", evt);
+                                console.log("TARGET", node.data());
+                                console.log("TARGET TYPE", typeof node[0]);
+                            });
+
+                        }}
+                    />
+                </div>
+            </div>
+        </>
+    );
+}
+
+export default Graph;

components/graph.js

@@ -1,200 +0,0 @@
-import Cytoscape from "cytoscape";
-var nodeHtmlLabel = require('cytoscape-node-html-label');
-
-
-const Graph = ({ el, graphdata, current }) => {
-    nodeHtmlLabel( Cytoscape );
-
-    var cy = Cytoscape({
-        container:el,
-        elements:graphdata,
-        style:[{
-            selector: "node",
-            style:{
-                "background-color" : el => el.data("id") === current ? '#5221c4' :  "#666",
-                "font-size": "10px",
-                "width": "20px",
-                "height": "20px"
-                //"label": el => el.data("id") === current ? "" : el.data('title') ? el.data("title").slice(0,16) : el.data("id")
-            }
-        },{
-            selector: "label",
-            style: {"font-size": "12px"},
-        },
-        {
-            selector: 'edge',
-            style: {
-              'width': 2,
-              "height":200,
-              'line-color': '#ffffff',
-              'target-arrow-color': '#ccc',
-              'target-arrow-shape': 'triangle',
-              'curve-style': 'bezier'
-            }
-          }],
-        layout: {
-            name: 'circle',
-
-            fit: true, // whether to fit the viewport to the graph
-            padding: 32, // the padding on fit
-            boundingBox: undefined, // constrain layout bounds; { x1, y1, x2, y2 } or { x1, y1, w, h }
-            avoidOverlap: true, // prevents node overlap, may overflow boundingBox and radius if not enough space
-            nodeDimensionsIncludeLabels: false, // Excludes the label when calculating node bounding boxes for the layout algorithm
-            spacingFactor: 0.9, // Applies a multiplicative factor (>0) to expand or compress the overall area that the nodes take up
-            radius: 180, // the radius of the circle
-            startAngle: -2 / 4 * Math.PI, // where nodes start in radians
-            //sweep: undefined, // how many radians should be between the first and last node (defaults to full circle)
-            clockwise: true, // whether the layout should go clockwise (true) or counterclockwise/anticlockwise (false)
-            sort: undefined, // a sorting function to order the nodes; e.g. function(a, b){ return a.data('weight') - b.data('weight') }
-            animate: false, // whether to transition the node positions
-            animationDuration: 500, // duration of animation in ms if enabled
-            animationEasing: undefined, // easing of animation if enabled
-            //animateFilter: function ( node, i ){ return true; }, // a function that determines whether the node should be animated.  All nodes animated by default on animate enabled.  Non-animated nodes are positioned immediately when the layout starts
-            ready: undefined, // callback on layoutready
-            stop: undefined, // callback on layoutstop
-            transform: function (node, position ){ return position; } // transform a given node position. Useful for changing flow direction in discrete layouts
-
-
-
-        },
-        zoom: 10,
-        hideEdgesOnViewport:false,
-        wheelSensitivity:0.2,
-    })
-
-    cy.nodeHtmlLabel( [{
-        query: "node",
-        halign:"top",
-        valign:"center",
-        cssClass: 'label',
-        tpl: el => {
-        //el.data("id") === current ? "" : el.data('title') ? el.data("title").slice(0,16) : el.data("id")
-        const label = el.id === current ? "" : el.title ? el.title : el.id
-        return  `<div title="${el.title ? el.title : el.id}" style='font-weight:400; margin-top:32px;max-width:180px;font-size:12px;color:white;cursor:pointer;'>${label}</div>`
-    }}],
-    {
-        enablePointerEvents: true
-      }
-    )
-    return cy
-}
-
-
-export const Network = ({ el, graphdata, current, routeHandler, allNodes }) => {
-    var jsnx = require('jsnetworkx');
-
-
-    //const grouper = (id) => id === "index" ? 1 : (id === "codesheet" ? 2 : 3)
-
-
-    var currentnode = graphdata.filter(g => g.data.id === current)[0]
-    currentnode = [currentnode.data.id, {
-            label:current==="index" ? "HOME" : currentnode.data.title ? currentnode.data.title : currentnode.data.id,
-            href:current==="index" ? "/" : `/note/${currentnode.data.id}`,
-            //group:grouper(current)
-        }];
-    //var currentTargetNames = graphdata.filter(g => g.data.source === current).map(e => e.data.target)
-    //var currentTargetNodes = graphdata.filter(g => currentTargetNames.includes(g.data.id))
-
-    var othernodes, edges;
-    if (allNodes){
-        othernodes = graphdata.filter(g => (g.data.id !== current) && !g.data.source)
-        othernodes = othernodes.map(on => [on.data.id ,{
-            label:on.data.title ? on.data.title : on.data.id,
-            href: on.data.id === "index" ? "/" : `/note/${on.data.id}`,
-            //group: grouper(on.data.id)
-            }
-        ])
-        //console.log(othernodes)
-        edges = graphdata.filter(g => g.data.source)
-        edges = edges.map(e => [e.data.source, e.data.target])
-    }
-    else {
-        //console.log("else")
-        var indexnode = graphdata.filter(g => g.data.id === "index")[0]
-        indexnode = ["Home", {
-            width:30,
-            height:30,
-            weight:1,
-            href:`/`,
-            title: "Home",
-            fill:"blueviolet",
-
-        }]
-
-        var currentRawEdges = graphdata.filter(g => g.data.source === current)
-        edges = currentRawEdges.map(ce => [ce.data.source, ce.data.target, {weight:1 } ])
-
-        var currentTargetNames = currentRawEdges.map(ie => ie.data.target)
-        var currentTargets = graphdata.filter(g => currentTargetNames.includes(g.data.id))
-        othernodes = currentTargets.map(ct => [ct.data.id, {size:6, href:`/note/${ct.data.id}`}])
-        if (current !== "index"){othernodes.push(indexnode)}
-        //othernodes = [indexnode, ...othernodes]
-    }
-
-
-
-    var G = new jsnx.DiGraph();
-    G.addNodesFrom(
-        [
-            currentnode,
-            ...othernodes,
-        ],
-        {color: '#999999', width:40, height:40}
-    );
-    G.addEdgesFrom(edges);
-
-    jsnx.draw(G, {
-        element: el,
-        withLabels: true,
-        labelStyle:{
-            color:"#333",
-            fill:function(n){
-                return n.node === current ? "#fff" : "#000"
-            }
-        },
-        labelAttr:{
-            class: "node-label",
-            y:16,
-            click:function(l){
-                this.addEventListener("click", function(){
-                    routeHandler(l.data.href)
-                })
-            }
-        },
-        weighted:true,
-        layoutAttr:{
-            linkDistance:200,
-            linkStrength:1.5,
-            friction:0.3,
-            charge: -180,
-            //charge:function(c){ return -80},
-        },
-        nodeStyle: {
-            fill: function(d) {
-                return "#999"
-                //console.log("group", d.data.group)
-                //return color(d.data.group);
-            },
-            stroke: 'none'
-        },
-        nodeAttr:{
-            class: "node-node",
-            click:function(l){
-                this.addEventListener("click", function(){
-                    console.log("lll", l.data);
-                    routeHandler(l.data.href)
-                })
-            }
-        },
-
-        edgeStyle:{
-            height:120,
-            strokeWidth:2,
-            stroke:"#999"
-        }
-    }, true);
-    return G
-}
-
-export default Graph;

lib/utils.js

@@ -6,10 +6,10 @@ import markdown from "remark-parse";
 import {toString} from 'mdast-util-to-string'
 
 export function getContent(filename) {
-    let { currentFilePath} = getFileNames(filename);
+    let {currentFilePath} = getFileNames(filename);
     //console.log("currentFilePath: ", currentFilePath)
     if (currentFilePath === undefined || currentFilePath == null) return null
-    return  Node.readFileSync(currentFilePath)
+    return Node.readFileSync(currentFilePath)
 }
 
 export function getShortSummary(filename) {
@@ -65,10 +65,6 @@ export function getSinglePost(filename) {
     var fileContent = Node.readFileSync(currentFilePath)
 
     const currentFileFrontMatter = Transformer.getFrontMatterData(fileContent)
-    //console.log("\tFounded front matter data: ", currentFileFrontMatter, "\n")
-    // fileContent = Transformer.preprocessThreeDashes(fileContent)
-    //fileContent = fileContent.split("---").join("")
-    //console.log("filecontent end")
 
     const [htmlContent] = Transformer.getHtmlContent(fileContent, {
         fileNames: fileNames,
@@ -88,7 +84,7 @@ export function constructBackLinks() {
     const edges = []
     const nodes = []
 
-    filePaths.forEach( filename => {
+    filePaths.forEach(filename => {
             const {currentFilePath, fileNames} = getFileNames(filename)
             const internalLinks = Transformer.getInternalLinks(currentFilePath)
             internalLinks.forEach(aLink => {
@@ -114,44 +110,34 @@ export function constructBackLinks() {
 
 
 export function getGraphData() {
-    const backlinkData = constructBackLinks()
 
-    const elements = []
+    const {nodes, edges} = constructBackLinks()
 
-    // First create Nodes
+    const newNodes = nodes.map(aNode => (
-    backlinkData.forEach(el => {
+        {data : {
-            const node = {data: {id: el.id}};
+            id: aNode.slug.toString(),
-
+                label: aNode.slug.toString(),
-            if (el.title) {
+                type: "ip"
-                node.data.title = el.title
-            }
-            if (el.description) {
-                node.data.description = el.description
-            }
-            elements.push(node)
         }
-    )
-
-
-    // Second create Edges
-    backlinkData.forEach(el => {
-        // check if has any internal link
-        if (el.to.length > 0) {
-            // create edge from  element to its links
-            el.to.forEach(linkElement => {
-                const edge = {
-                    data: {
-                        id: `${el.id}-${linkElement}`,
-                        source: el.id,
-                        target: linkElement
-                    }
-                }
-                elements.push(edge)
-            })
         }
-    })
+    ))
 
-    return elements
+    const newEdges = edges.map(anEdge => ({
+        data: {
+            source: anEdge.source,
+            target: anEdge.target,
+            // label: anEdge.source + " => " + anEdge.target
+        }
+    }))
+
+    // Remove edges that don't have any connections
+    const existingNodeID = newNodes.map(aNode => aNode.data.id)
+    const filteredEdges = newEdges.filter(edge => existingNodeID.includes(edge.data.source)).filter(edge => existingNodeID.includes(edge.data.target))
+
+    return {
+        nodes: newNodes,
+        edges: filteredEdges
+    }
 }
 
 export function getContentPaths() {

package.json

@@ -27,6 +27,7 @@
     "next": "12",
     "path": "^0.12.7",
     "react": "^17.0.2",
+    "react-cytoscapejs": "^1.2.1",
     "react-dom": "^17.0.2",
     "react-folder-tree": "^5.0.3",
     "rehype-react": "^7.0.4",
@@ -47,6 +48,8 @@
   "devDependencies": {
     "bimap": "^0.0.15",
     "cytoscape": "^3.17.0",
+    "eslint": "8.13.0",
+    "eslint-config-next": "12.1.5",
     "remark-frontmatter": "^3.0.0",
     "remark-react": "^8.0.0",
     "remark-stringify": "^9.0.0",

pages/index.js

@@ -1,10 +1,17 @@
 import Layout from "../components/layout";
-import {getSinglePost, getDirectoryData, convertObject, getFlattenArray} from "../lib/utils";
+import {getSinglePost, getDirectoryData, convertObject, getFlattenArray, getGraphData} from "../lib/utils";
 import FolderTree from "../components/FolderTree";
 import MDContainer from "../components/MDContainer";
+import dynamic from 'next/dynamic'
 
-export default function Home({content, tree, flattenNodes}) {
 
+// This trick is to dynamically load component that interact with window object (browser only)
+const DynamicGraph = dynamic(
+    () => import('../components/Graph'),
+    { loading: () => <p>Loading ...</p>, ssr: false }
+)
+
+export default function Home({graphData, content, tree, flattenNodes}) {
     return (
         <Layout>
             <div className = 'container'>
@@ -13,6 +20,8 @@ export default function Home({content, tree, flattenNodes}) {
                 </nav>
                 <MDContainer post={content.data}/>
             </div>
+            <hr/>
+            <DynamicGraph graph={graphData}/>
         </Layout>
     );
 
@@ -22,11 +31,13 @@ export function getStaticProps() {
     const tree = convertObject(getDirectoryData());
     const contentData = getSinglePost("index");
     const flattenNodes = getFlattenArray(tree)
+    const graphData = getGraphData();
     return {
         props: {
             content: contentData,
             tree: tree,
-            flattenNodes: flattenNodes
+            flattenNodes: flattenNodes,
+            graphData:graphData,
         },
     };
 }