Create graph.py

genesis/graph.py

@@ -0,0 +1,40 @@
+## `genesis/graph.py`
+
+from __future__ import annotations
+import os, html
+from typing import List
+
+# Lightweight graph preview from citations (no DB required). If Neo4j is configured, you can extend here.
+
+def build_preview_graph_html(citations: List[dict]) -> str:
+    # Simple HTML graph: papers as nodes, edges from a central topic node
+    if not citations:
+        return "<p><em>No citations to graph.</em></p>"
+    nodes = []
+    edges = []
+    nodes.append({"id": "topic", "label": "Topic", "color": "#0ea5e9"})
+    for i, c in enumerate(citations):
+        nid = f"p{i}"
+        label = (c.get("title") or "citation").strip()[:80]
+        url = html.escape(c.get("url", ""))
+        nodes.append({"id": nid, "label": label, "url": url})
+        edges.append({"from": "topic", "to": nid})
+    # Minimal vis.js rendering
+    return f"""
+    <div id='g' style='height:480px'></div>
+    <script src='https://unpkg.com/[email protected]/dist/vis-network.min.js'></script>
+    <script>
+      const nodes = new vis.DataSet({nodes});
+      const edges = new vis.DataSet({edges});
+      const container = document.getElementById('g');
+      const data = {{ nodes, edges }};
+      const options = {{ nodes: {{ shape: 'dot', size: 12 }}, edges: {{ arrows: {{to:false}} }} }};
+      const network = new vis.Network(container, data, options);
+      network.on('click', function (params) {{
+        if(params.nodes && params.nodes.length) {{
+          const n = nodes.get(params.nodes[0]);
+          if(n.url) window.open(n.url, '_blank');
+        }}
+      }});
+    </script>
+    """.replace("{nodes}", str(nodes)).replace("{edges}", str(edges))