Silanus/tree.html at main · ttschoonover/Silanus · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>Policy Tree Visualization</title>
  <script src="https://d3js.org/d3.v7.min.js"></script>
  <style>
    body {
      font-family: sans-serif;
      margin: 0;
      background-color: black;
      color: white;
    }
    svg {
      width: 100vw;
      height: 100vh;
    }
    .link {
      fill: none;
      stroke: #999;
      stroke-opacity: 0.6;
      stroke-width: 1.5px;
      marker-end: url(#arrow);
    }
    .node text {
      font-size: 12px;
      pointer-events: all;
    }
    .node a {
      text-decoration: none;
      fill: black;
    }
    #controls {
      position: absolute;
      top: 10px;
      left: 10px;
      background: rgba(0, 0, 0, 0.7);
      padding: 10px;
      border-radius: 10px;
      z-index: 10;
    }
    #controls label {
      display: block;
      margin-bottom: 4px;
    }
  </style>
</head>
<body>
  <div id="controls">
    <label for="nodeSelector">Focus on ID:</label>
    <select id="nodeSelector">
      <option value="">-- None --</option>
    </select>
  </div>
  <svg></svg>

  <script>
    let originalData = [];
    let focusedId = null;
    let nodeById = new Map();

    // Function to update URL without reloading the page
    function updateUrl(id) {
      const newUrl = id ? `tree.html?id=${id}` : 'tree.html';
      window.history.pushState({ path: newUrl }, '', newUrl);
    }

    d3.json("rules.json").then(function(data) {
      originalData = data;
      nodeById = new Map(data.map(d => [d.id, d]));

      const width = window.innerWidth;
      const height = window.innerHeight;

      const svg = d3.select("svg");
      const container = svg.append("g");

      svg.call(d3.zoom()
        .scaleExtent([0.2, 2])
        .on("zoom", (event) => container.attr("transform", event.transform)))
        .call(d3.zoom().transform, d3.zoomIdentity.translate(width / 2, height / 2).scale(0.8));

      const allTypes = Array.from(new Set(data.map(d => d.type)));
      const colorScale = {
        "Purpose": "gold",
        "Principle": "orange",
        "Law": "skyblue",
        "Right": "lightcoral",
        "Obligation": "lightpink",
        "Duty": "lightgray",
        "Section": "lightgreen"
      };

      const typeFilter = {};
      allTypes.forEach(type => typeFilter[type] = true); // show all types initially

      const controls = d3.select("#controls");
      allTypes.forEach(type => {
        controls.append("label")
          .html(`<input type="checkbox" checked data-type="${type}"/> ${type}`);
      });

      controls.selectAll("input").on("change", function() {
        typeFilter[this.dataset.type] = this.checked;
        updateGraph();
      });

      const selector = d3.select("#nodeSelector");
      data.forEach(d => {
        selector.append("option").attr("value", d.id).text(`${d.id}: ${d.name}`);
      });

      // Get the ID from the URL if present
      const urlParams = new URLSearchParams(window.location.search);
      focusedId = urlParams.get("id") ? parseInt(urlParams.get("id")) : null;

      // Update the selector based on the focused ID from the URL
      if (focusedId) {
        selector.property("value", focusedId);
      }

      selector.on("change", function() {
        focusedId = this.value ? +this.value : null;
        updateUrl(focusedId); // Update URL
        updateGraph();
      });

      // Arrow marker
      container.append("defs").append("marker")
        .attr("id", "arrow")
        .attr("viewBox", "0 -5 10 10")
        .attr("refX", 18)
        .attr("refY", 0)
        .attr("markerWidth", 6)
        .attr("markerHeight", 6)
        .attr("orient", "auto")
        .append("path")
        .attr("d", "M0,-5L10,0L0,5")
        .attr("fill", "#999");

      let simulation;

      function updateGraph() {
        let currentData = [...originalData];
        let highlightMap = new Map();

        if (focusedId && nodeById.has(focusedId)) {
          const self = focusedId;
          const children = getAllChildren(focusedId);
          const parents = getAllParents(focusedId);
          const citations = getCitingNodes(focusedId);

          highlightMap.set(self, 'self');
          children.forEach(id => highlightMap.set(id, 'child'));
          parents.forEach(id => highlightMap.set(id, 'parent'));
          citations.forEach(id => highlightMap.set(id, 'cited'));

          const idsToShow = new Set([self, ...children, ...parents, ...citations]);
          currentData = [...idsToShow].map(id => nodeById.get(id));
        }

        const filteredNodes = currentData.filter(d => typeFilter[d.type]);
        const filteredNodeIds = new Set(filteredNodes.map(d => d.id));

        const filteredLinks = [];
        filteredNodes.forEach(source => {
          if (Array.isArray(source.links)) {
            source.links.forEach(targetId => {
              if (filteredNodeIds.has(targetId)) {
                filteredLinks.push({ source: source.id, target: targetId });
              }
            });
          }
        });

        container.selectAll(".link").remove();
        container.selectAll(".node").remove();

        const nodes = filteredNodes.map(d => ({
          id: d.id,
          name: d.name,
          type: d.type,
          highlight: highlightMap.get(d.id) || null
        }));
        const links = filteredLinks;

        simulation?.stop();

        simulation = d3.forceSimulation(nodes)
          .force("link", d3.forceLink(links).id(d => d.id).distance(140))
          .force("charge", d3.forceManyBody().strength(-400))
          .force("center", d3.forceCenter(0, 0));

        const link = container.append("g")
          .attr("stroke", "#aaa")
          .attr("stroke-opacity", 0.6)
          .selectAll("path")
          .data(links)
          .join("path")
          .attr("class", "link")
          .attr("marker-end", "url(#arrow)");

        const node = container.append("g")
          .attr("stroke", "#fff")
          .attr("stroke-width", 1.5)
          .selectAll("g")
          .data(nodes)
          .join("g")
          .attr("class", "node")
          .call(drag(simulation));

        node.append("circle")
          .attr("r", d => {
            switch (d.type) {
              case "Purpose":
              case "Principle": return 36;
              case "Law": return 18;
              case "Section": return 9;
              case "Right":
              case "Obligation":
              case "Duty": return 24;
              default: return 12;
            }
          })
          .attr("fill", d => {
            if (d.highlight === 'self') return "#ffffff";
            if (d.highlight === 'child') return "#ffff99";
            if (d.highlight === 'parent') return "#99ccff";
            if (d.highlight === 'cited') return "#66ff66";
            return colorScale[d.type] || "gray";
          });

        node.append("a")
          .attr("xlink:href", d => `tree.html?id=${d.id}`)
          .append("text")
          .text(d => `${d.id}: ${d.name}`)
          .attr("x", 15)
          .attr("y", 4);

        simulation.on("tick", () => {
          link.attr("d", d => `M${d.source.x},${d.source.y}L${d.target.x},${d.target.y}`);
          node.attr("transform", d => `translate(${d.x},${d.y})`);
        });
      }

      function drag(simulation) {
        function dragstarted(event, d) {
          if (!event.active) simulation.alphaTarget(0.3).restart();
          d.fx = d.x;
          d.fy = d.y;
        }
        function dragged(event, d) {
          d.fx = event.x;
          d.fy = event.y;
        }
        function dragended(event, d) {
          if (!event.active) simulation.alphaTarget(0);
          d.fx = null;
          d.fy = null;
        }
        return d3.drag()
          .on("start", dragstarted)
          .on("drag", dragged)
          .on("end", dragended);
      }

      // Function to get all children (recursive)
      function getAllChildren(startId) {
        const visited = new Set();
        const result = [];

        function findChildren(id) {
          if (visited.has(id)) return;
          visited.add(id);

          const node = nodeById.get(id);
          if (node?.links) {
            for (const childId of node.links) {
              result.push(childId);
              findChildren(childId); // Recursively find children's children
            }
          }
        }

        findChildren(startId);
        return result;
      }

      // Function to get all parents (recursive)
      function getAllParents(targetId) {
        const visited = new Set();
        const result = [];

        function findParents(id) {
          if (visited.has(id)) return;
          visited.add(id);

          const parents = originalData.filter(node => node.links?.includes(id));
          for (const parent of parents) {
            result.push(parent.id);
            findParents(parent.id); // Recursively find parent's parents
          }
        }

        findParents(targetId);
        return result;
      }

      function getCitingNodes(id) {
        return originalData
          .filter(node => node.links?.includes(id))
          .map(node => node.id)
          .filter(parentId => parentId !== focusedId);
      }

      updateGraph();
    });
  </script>
</body>
</html>