_scripts/make_influence_graph.py

#!/usr/bin/env python3
"""Generate a self-contained interactive paper-influence graph (D3 force layout).

Nodes are papers (and registered influences); a directed edge A->B means paper A
`builds-on` paper B, so B *influenced* A. Node size = in-degree (how many papers
build on it = its influence); node color = publication year. Only edges whose
both endpoints are in-graph notes are drawn. One HTML file, D3 from CDN; drag,
scroll-zoom, hover for the paper slug (hubs are labelled always).

    python3 _scripts/make_influence_graph.py --out reports/influence-all.html
    python3 _scripts/make_influence_graph.py --since 2021 --embed --out reports/influence-2021.html

Flags: --since YEAR (keep only edges with both endpoints published >= YEAR),
--embed (strip header, for <iframe>), --title, --out. Companion to
make_graph.py / make_author_graph.py; see skills/visualize-graph/SKILL.md.
"""
import argparse
import glob
import json
import os
import re
from collections import Counter

VAULT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


def build(since):
    files = glob.glob(os.path.join(VAULT, "papers", "*.md")) + \
        glob.glob(os.path.join(VAULT, "influences", "*.md"))
    alln, year = set(), {}
    for f in files:
        s = os.path.basename(f)[:-3]
        alln.add(s)
        m = re.search(r"^year:\s*(\d{4})", open(f, encoding="utf-8").read(), re.M)
        year[s] = int(m.group(1)) if m else None
    edges = []
    for f in files:
        s = os.path.basename(f)[:-3]
        for mm in re.finditer(r"(?<![a-z])builds-on::\s*\[\[([^\]]+)\]\]", open(f, encoding="utf-8").read()):
            t = mm.group(1)
            if t in alln:
                edges.append((s, t))
    if since:
        edges = [(s, t) for s, t in edges if (year.get(s) or 0) >= since and (year.get(t) or 0) >= since]
    indeg = Counter(t for _, t in edges)
    used = {n for e in edges for n in e}
    nodes = [{"id": n, "label": n, "deg": indeg.get(n, 0), "year": year.get(n) or 0}
             for n in used]
    links = [{"source": s, "target": t} for s, t in edges]
    yrs = [n["year"] for n in nodes if n["year"]]
    return {"nodes": nodes, "links": links, "ymin": min(yrs) if yrs else 2016,
            "ymax": max(yrs) if yrs else 2026}


HEADER = '''<div id="hd"><h1>{title}</h1>
<p>A directed edge A&rarr;B means paper A builds on paper B, so B influenced A. Node size = how many papers build on it (its influence); color = year. Drag, scroll to zoom, hover for the paper.</p></div>
'''

TEMPLATE = '''<!doctype html>
<html lang="en"><head>
<meta charset="utf-8"/><meta name="viewport" content="width=device-width,initial-scale=1"/>
<title>{title}</title>
<script src="https://cdn.jsdelivr.net/npm/d3@7/dist/d3.min.js"></script>
<style>
  :root{{--bg:#fbfaf8;--ink:#1a1a1f;--muted:#6b6b78;--line:#e7e4de;}}
  *{{box-sizing:border-box}} html,body{{margin:0;height:100%}}
  body{{background:var(--bg);color:var(--ink);font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;overflow:hidden}}
  #hd{{position:fixed;top:0;left:0;right:0;padding:14px 20px;z-index:5;pointer-events:none}}
  #hd h1{{font:600 19px/1.2 Georgia,serif;margin:0}}
  #hd p{{margin:3px 0 0;color:var(--muted);font-size:13px;max-width:680px}}
  #legend{{position:fixed;bottom:16px;left:16px;background:#fffdfaee;border:1px solid var(--line);border-radius:10px;padding:11px 13px;font-size:12.5px;z-index:5;box-shadow:0 2px 10px #0000000d}}
  #legend b{{display:block;margin:0 0 6px;font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}}
  #legend .row{{display:flex;align-items:center;gap:8px;margin:4px 0}}
  #net{{width:100vw;height:100vh;cursor:grab}}
  .link{{stroke:#c3bdb0;stroke-opacity:.55}}
  .node circle{{stroke:#fff;stroke-width:1}}
  .lbl{{font-size:11px;fill:var(--ink);pointer-events:none;paint-order:stroke;stroke:#fbfaf8;stroke-width:3px;stroke-linejoin:round}}
</style></head><body>
{header}<div id="legend">
  <b>Node size = influence</b>
  <div class="row"><svg width="46" height="18"><circle cx="8" cy="9" r="3.5" fill="#888"/><circle cx="32" cy="9" r="10" fill="#888"/></svg>papers building on it</div>
  <b style="margin-top:8px">Color = year</b>
  <div class="row"><svg width="120" height="12"><defs><linearGradient id="yg"><stop offset="0%" stop-color="{cold}"/><stop offset="100%" stop-color="{hot}"/></linearGradient></defs><rect width="120" height="8" y="2" fill="url(#yg)"/></svg></div>
  <div class="row" style="justify-content:space-between;color:var(--muted);font-size:11px"><span>{ymin}</span><span>{ymax}</span></div>
</div>
<svg id="net"><defs><marker id="arrow" viewBox="0 -5 10 10" refX="8" refY="0" markerWidth="5" markerHeight="5" orient="auto"><path d="M0,-4L8,0L0,4" fill="#b3ac9d"/></marker></defs></svg>
<script>
const data={data};
const color=d3.scaleSequential(d3.interpolateViridis).domain([data.ymin,data.ymax]);
const R=d=>3+2.3*Math.sqrt(d.deg), LBL_MIN=4;
const svg=d3.select("#net"),W=innerWidth,H=innerHeight,g=svg.append("g");
const zoom=d3.zoom().scaleExtent([0.12,4]).on("zoom",e=>g.attr("transform",e.transform));svg.call(zoom);
const link=g.append("g").selectAll("line").data(data.links).join("line")
  .attr("class","link").attr("marker-end","url(#arrow)");
const node=g.append("g").selectAll("g").data(data.nodes).join("g").attr("class","node");
node.append("circle").attr("r",R).attr("fill",d=>d.year?color(d.year):"#bbb");
node.append("title").text(d=>d.label+" · "+d.deg+" build on it · "+(d.year||"?"));
node.append("text").attr("class","lbl").attr("x",d=>R(d)+3).attr("y",4)
  .style("opacity",d=>d.deg>=LBL_MIN?1:0).text(d=>d.label);
node.on("mouseover",function(){{d3.select(this).select("text").style("opacity",1)}})
    .on("mouseout",function(e,d){{d3.select(this).select("text").style("opacity",d.deg>=LBL_MIN?1:0)}});
node.call(d3.drag()
  .on("start",(e,d)=>{{if(!e.active)sim.alphaTarget(.3).restart();d.fx=d.x;d.fy=d.y}})
  .on("drag",(e,d)=>{{d.fx=e.x;d.fy=e.y}})
  .on("end",(e,d)=>{{if(!e.active)sim.alphaTarget(0);d.fx=null;d.fy=null}}));
function ticked(){{
  link.attr("x1",d=>d.source.x).attr("y1",d=>d.source.y)
      .attr("x2",d=>{{const dx=d.target.x-d.source.x,dy=d.target.y-d.source.y,l=Math.hypot(dx,dy)||1;return d.target.x-dx/l*(R(d.target)+4)}})
      .attr("y2",d=>{{const dx=d.target.x-d.source.x,dy=d.target.y-d.source.y,l=Math.hypot(dx,dy)||1;return d.target.y-dy/l*(R(d.target)+4)}});
  node.attr("transform",d=>`translate(${{d.x}},${{d.y}})`);
}}
const sim=d3.forceSimulation(data.nodes)
  .force("link",d3.forceLink(data.links).id(d=>d.id).distance(46).strength(.35))
  .force("charge",d3.forceManyBody().strength(-160).distanceMax(600))
  .force("x",d3.forceX(W/2).strength(.05)).force("y",d3.forceY(H/2).strength(.05))
  .force("collide",d3.forceCollide(d=>R(d)+4))
  .stop();
sim.tick(400); ticked(); fit(); sim.on("tick",ticked);
function fit(){{
  const xs=data.nodes.map(d=>d.x),ys=data.nodes.map(d=>d.y);
  const x0=Math.min(...xs),x1=Math.max(...xs),y0=Math.min(...ys),y1=Math.max(...ys);
  const w=(x1-x0)||1,h=(y1-y0)||1,k=Math.min(2.5,0.92/Math.max(w/W,h/H));
  svg.call(zoom.transform,d3.zoomIdentity.translate(W/2-k*(x0+x1)/2,H/2-k*(y0+y1)/2).scale(k));
}}
</script></body></html>'''


def main():
    ap = argparse.ArgumentParser()
    ap.add_argument("--since", type=int, default=0)
    ap.add_argument("--embed", action="store_true")
    ap.add_argument("--title", default=None)
    ap.add_argument("--out", default="reports/influence-graph.html")
    a = ap.parse_args()
    title = a.title or (f"Paper influence — builds-on, since {a.since}" if a.since
                        else "Paper influence — builds-on, all time")
    data = build(a.since)
    cold = "#440154"  # viridis ends, for the legend gradient
    hot = "#fde725"
    header = "" if a.embed else HEADER.format(title=title)
    html = TEMPLATE.format(title=title, header=header, data=json.dumps(data),
                           ymin=data["ymin"], ymax=data["ymax"], cold=cold, hot=hot)
    out = a.out if os.path.isabs(a.out) else os.path.join(VAULT, a.out)
    os.makedirs(os.path.dirname(out), exist_ok=True)
    open(out, "w", encoding="utf-8").write(html)
    print(f"wrote {out}: {len(data['nodes'])} nodes, {len(data['links'])} builds-on edges")


if __name__ == "__main__":
    main()