D3 Examples - Projet : Artists recommendation

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
.links line {
  stroke: #999;
  stroke-opacity: 0.6;
}
​
.nodes circle {
  stroke: #fff;
  stroke-width: 1.5px;
}
​
</style>
<svg width="960" height="600"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
​
var svg = d3.select("svg"),
    width = +svg.attr("width"),
    height = +svg.attr("height");
 
var color = d3.scaleOrdinal(d3.schemeCategory20);
  
var tooltip = d3.select('body').append('div')
            .attr('class', 'hidden tooltip');
​
var simulation = d3.forceSimulation()
    .force("link", d3.forceLink().id(function(d) { return d.artist; }))
    .force("charge", d3.forceManyBody().distanceMax(200))
    .force("center", d3.forceCenter(width / 2, height / 2));
  
d3.csv("recommandations.csv", function(data){
    var links = [];
    var nodes = new Set();
    for (var i=0; i< data.length; i++){
      links.push({source: data[i].Antecedant, target: data[i].Consequence, value: parseFloat(data[i].ItemSetSupport)});
      nodes.add(data[i].Antecedant);
      nodes.add(data[i].Consequence);
    }
  // console.log("links 2  : " + links[2])
  // console.log("links 2 target : " + links[2].target)
    // console.log("links 2 source : " + links[2].source)
    // console.log("links 2 égalité : " + links[2].target == links[2].target)
  // var tmp = links[1].source
  // var art = links[2].source
  // console.log("tmp : " + tmp)
  // console.log("art : " + art)
  // console.log(tmp === art)
  
  var nodesArray = Array.from(nodes).map(function(e){return {artist: e}});
  
  // console.log("nodesArray : " + nodesArray[0].artist)
  // console.log("links : " + links[1].source)
  // console.log(nodesArray[0].artist == links[1].source)
  
  for (i=0; i<nodesArray.length; i++){
    recommandations=[];
    for (j=0; j<links.length;j++){
      if (nodesArray[i].artist == links[j].source){
        recommandations.push(links[j].target)
      }
    }
    nodesArray[i].rec = recommandations ;
  }
 
  // console.log("rec : " + nodesArray[0].rec.length)
  
  var link = svg.append("g")
        .attr("class", "links")
    .selectAll("line")
    .data(links)
    .enter().append("line")
        .attr("stroke", "grey");
  
  var node = svg.append("g")
    .attr("class", "nodes")
    .selectAll("circle")
    .data(nodesArray)
    .enter().append("circle")
    .attr("r", 7)
    .attr("fill", "grey")
    .style("opacity", 0.5)
    .call(d3.drag()
            .on("start", dragstarted)
            .on("drag", dragged)
            .on("end", dragended))
  
    .on("mouseover", function(d) {                      // d = nodesArray[this]
      var mouse = d3.mouse(svg.node()).map(function(d) {
        return parseInt(d);
      });
      // console.log("mouse0 : " + mouse[0])
      d3.select(this)
        .style("fill", "red")
        .attr("r", 20)
        .style("opacity", 1)
      // console.log("artist d : " + d.artist)
      // console.log("taille de rec : " + d.rec.length)
      // console.log("taille de nodesArray : " + nodesArray.length)
      // console.log("recommandations : " + d.rec[0])
      // console.log("nodesArray[0].artist : " + nodesArray[0].artist) 
      // console.log(d.rec[0] == nodesArray[0].artist) 
      for (j=0; j<d.rec.length; i++){
        for (k=0; k<nodesArray.length; k++){
          if (d.rec[j] == nodesArray[k].artist){
            d3.select(nodesArray[k])
                .style("fill", "red")
                .attr("r", 15)
                .style("opacity", 1)
            // break ;
          }
        }
      } 
        
        
       /* 
        d3.select(d.rec[j])
          .style("fill", "red")
          .attr("r", 15)
          .style("opacity", 1)
      }*/
      
      
      /* 
      var art = d.artist ;
      // console.log("art : " + art)
      var tmp = links[2].source
      // console.log("tmp : " + tmp)
      for (i=0; i<links.length; i++){   
        var tmp = links[i].source ;
        console.log("tmp : " + tmp)
        if (tmp === art) {
            d3.selectAll(links[i].target)
            .style("fill", "red")
            .attr("r", 15)
            .style("opacity", 1)
            // d3.selectAll(links[this]).attr("stroke", "red");
        }
      } */
      
      tooltip.classed('hidden', false)
        .attr("y", this.y)
        .attr("x", this.x)
        .attr('style', 'left:' + (mouse[0] + 15) + 'px; top:' + (mouse[1] - 5) + 'px')
        .style("text-anchor", "start")
        .style("font-size","25px")
        .style("font-weight", "normal")
        .html("Artiste : " + d.artist + "<br>Tags : " )
    })
  
        .on("mouseout", function(d){ 
        d3.select(this).style("fill","grey").attr("r", 7).style("opacity",0.5)
      tooltip.classed('hidden', true);
    }) ;
  
  node.append("title")
      .text(function(d) { return d.artist; });
  
  simulation
      .nodes(nodesArray)
      .on("tick", ticked);
​
  simulation.force("link")
      .links(links);
 
  function ticked() {
    link
        .attr("x1", function(d) { return d.source.x; })
        .attr("y1", function(d) { return d.source.y; })
        .attr("x2", function(d) { return d.target.x; })
        .attr("y2", function(d) { return d.target.y; });
​
    node
        .attr("cx", function(d) { return d.x; })
        .attr("cy", function(d) { return d.y; });
  } 
  
  });
  
  function dragstarted(d) {
    if (!d3.event.active) simulation.alphaTarget(0.3).restart();
      d.fx = d.x;
    d.fy = d.y;
}
​
    function dragged(d) {
    d.fx = d3.event.x;
    d.fy = d3.event.y;
    }
​
    function dragended(d) {
    if (!d3.event.active) simulation.alphaTarget(0);
    d.fx = null;
    d.fy = null;
}
​
</script>
    