From 14cbbdb8a2f69ebc51cd53a82b50206c543778b0 Mon Sep 17 00:00:00 2001
From: Oskar Manhart <52569953+oskardotglobal@users.noreply.github.com>
Date: Thu, 14 Sep 2023 03:55:59 +0000
Subject: [PATCH] feat: display tag in graph view (#466)

---
 quartz/components/scripts/graph.inline.ts |  133 +++++++++++++++++++++++++------------------
 1 files changed, 77 insertions(+), 56 deletions(-)

diff --git a/quartz/components/scripts/graph.inline.ts b/quartz/components/scripts/graph.inline.ts
index 1556095..1aff138 100644
--- a/quartz/components/scripts/graph.inline.ts
+++ b/quartz/components/scripts/graph.inline.ts
@@ -1,30 +1,32 @@
-import { ContentDetails } from "../../plugins/emitters/contentIndex"
-import * as d3 from 'd3'
-import { registerEscapeHandler, relative, removeAllChildren } from "./util"
+import type { ContentDetails } from "../../plugins/emitters/contentIndex"
+import * as d3 from "d3"
+import { registerEscapeHandler, removeAllChildren } from "./util"
+import { FullSlug, SimpleSlug, getFullSlug, resolveRelative, simplifySlug } from "../../util/path"
 
 type NodeData = {
-  id: string,
-  text: string,
+  id: SimpleSlug
+  text: string
   tags: string[]
 } & d3.SimulationNodeDatum
 
 type LinkData = {
-  source: string,
-  target: string
+  source: SimpleSlug
+  target: SimpleSlug
 }
 
 const localStorageKey = "graph-visited"
-function getVisited(): Set<string> {
+function getVisited(): Set<SimpleSlug> {
   return new Set(JSON.parse(localStorage.getItem(localStorageKey) ?? "[]"))
 }
 
-function addToVisited(slug: string) {
+function addToVisited(slug: SimpleSlug) {
   const visited = getVisited()
   visited.add(slug)
   localStorage.setItem(localStorageKey, JSON.stringify([...visited]))
 }
 
-async function renderGraph(container: string, slug: string) {
+async function renderGraph(container: string, fullSlug: FullSlug) {
+  const slug = simplifySlug(fullSlug)
   const visited = getVisited()
   const graph = document.getElementById(container)
   if (!graph) return
@@ -39,45 +41,72 @@
     centerForce,
     linkDistance,
     fontSize,
-    opacityScale
+    opacityScale,
+    removeTags,
+    showTags,
   } = JSON.parse(graph.dataset["cfg"]!)
 
   const data = await fetchData
 
   const links: LinkData[] = []
+  const tags: SimpleSlug[] = []
+
+  const validLinks = new Set(Object.keys(data).map((slug) => simplifySlug(slug as FullSlug)))
+
   for (const [src, details] of Object.entries<ContentDetails>(data)) {
+    const source = simplifySlug(src as FullSlug)
     const outgoing = details.links ?? []
+
     for (const dest of outgoing) {
-      if (src in data && dest in data) {
-        links.push({ source: src, target: dest })
+      if (validLinks.has(dest)) {
+        links.push({ source, target: dest })
+      }
+    }
+
+    if (showTags) {
+      const localTags = details.tags
+        .filter((tag) => !removeTags.includes(tag))
+        .map((tag) => simplifySlug(("tags/" + tag) as FullSlug))
+
+      tags.push(...localTags.filter((tag) => !tags.includes(tag)))
+
+      for (const tag of localTags) {
+        links.push({ source, target: tag })
       }
     }
   }
 
-  const neighbourhood = new Set()
-
-  const wl = [slug, "__SENTINEL"]
+  const neighbourhood = new Set<SimpleSlug>()
+  const wl: (SimpleSlug | "__SENTINEL")[] = [slug, "__SENTINEL"]
   if (depth >= 0) {
     while (depth >= 0 && wl.length > 0) {
       // compute neighbours
-      const cur = wl.shift()
+      const cur = wl.shift()!
       if (cur === "__SENTINEL") {
         depth--
         wl.push("__SENTINEL")
       } else {
         neighbourhood.add(cur)
-        const outgoing = links.filter(l => l.source === cur)
-        const incoming = links.filter(l => l.target === cur)
+        const outgoing = links.filter((l) => l.source === cur)
+        const incoming = links.filter((l) => l.target === cur)
         wl.push(...outgoing.map((l) => l.target), ...incoming.map((l) => l.source))
       }
     }
   } else {
-    Object.keys(data).forEach(id => neighbourhood.add(id))
+    Object.keys(data).forEach((id) => neighbourhood.add(simplifySlug(id as FullSlug)))
+    if (showTags) tags.forEach((tag) => neighbourhood.add(tag))
   }
 
-  const graphData: { nodes: NodeData[], links: LinkData[] } = {
-    nodes: Object.keys(data).filter(id => neighbourhood.has(id)).map(url => ({ id: url, text: data[url]?.title ?? url, tags: data[url]?.tags ?? [] })),
-    links: links.filter((l) => neighbourhood.has(l.source) && neighbourhood.has(l.target))
+  const graphData: { nodes: NodeData[]; links: LinkData[] } = {
+    nodes: [...neighbourhood].map((url) => {
+      const text = url.startsWith("tags/") ? "#" + url.substring(5) : data[url]?.title ?? url
+      return {
+        id: url,
+        text: text,
+        tags: data[url]?.tags ?? [],
+      }
+    }),
+    links: links.filter((l) => neighbourhood.has(l.source) && neighbourhood.has(l.target)),
   }
 
   const simulation: d3.Simulation<NodeData, LinkData> = d3
@@ -96,11 +125,11 @@
   const width = graph.offsetWidth
 
   const svg = d3
-    .select<HTMLElement, NodeData>('#' + container)
+    .select<HTMLElement, NodeData>("#" + container)
     .append("svg")
     .attr("width", width)
     .attr("height", height)
-    .attr('viewBox', [-width / 2 / scale, -height / 2 / scale, width / scale, height / scale])
+    .attr("viewBox", [-width / 2 / scale, -height / 2 / scale, width / scale, height / scale])
 
   // draw links between nodes
   const link = svg
@@ -120,7 +149,7 @@
     const isCurrent = d.id === slug
     if (isCurrent) {
       return "var(--secondary)"
-    } else if (visited.has(d.id)) {
+    } else if (visited.has(d.id) || d.id.startsWith("tags/")) {
       return "var(--tertiary)"
     } else {
       return "var(--gray)"
@@ -145,7 +174,7 @@
       d.fy = null
     }
 
-    const noop = () => { }
+    const noop = () => {}
     return d3
       .drag<Element, NodeData>()
       .on("start", enableDrag ? dragstarted : noop)
@@ -167,12 +196,14 @@
     .attr("fill", color)
     .style("cursor", "pointer")
     .on("click", (_, d) => {
-      const targ = relative(slug, d.id)
-      window.spaNavigate(new URL(targ))
+      const targ = resolveRelative(fullSlug, d.id)
+      window.spaNavigate(new URL(targ, window.location.toString()))
     })
-    .on("mouseover", function(_, d) {
-      const neighbours: string[] = data[slug].links ?? []
-      const neighbourNodes = d3.selectAll<HTMLElement, NodeData>(".node").filter((d) => neighbours.includes(d.id))
+    .on("mouseover", function (_, d) {
+      const neighbours: SimpleSlug[] = data[fullSlug].links ?? []
+      const neighbourNodes = d3
+        .selectAll<HTMLElement, NodeData>(".node")
+        .filter((d) => neighbours.includes(d.id))
       const currentId = d.id
       const linkNodes = d3
         .selectAll(".link")
@@ -182,12 +213,7 @@
       neighbourNodes.transition().duration(200).attr("fill", color)
 
       // highlight links
-      linkNodes
-        .transition()
-        .duration(200)
-        .attr("stroke", "var(--gray)")
-        .attr("stroke-width", 1)
-
+      linkNodes.transition().duration(200).attr("stroke", "var(--gray)").attr("stroke-width", 1)
 
       const bigFont = fontSize * 1.5
 
@@ -198,11 +224,11 @@
         .select("text")
         .transition()
         .duration(200)
-        .attr('opacityOld', d3.select(parent).select('text').style("opacity"))
-        .style('opacity', 1)
-        .style('font-size', bigFont + 'em')
+        .attr("opacityOld", d3.select(parent).select("text").style("opacity"))
+        .style("opacity", 1)
+        .style("font-size", bigFont + "em")
     })
-    .on("mouseleave", function(_, d) {
+    .on("mouseleave", function (_, d) {
       const currentId = d.id
       const linkNodes = d3
         .selectAll(".link")
@@ -215,8 +241,8 @@
         .select("text")
         .transition()
         .duration(200)
-        .style('opacity', d3.select(parent).select('text').attr("opacityOld"))
-        .style('font-size', fontSize + 'em')
+        .style("opacity", d3.select(parent).select("text").attr("opacityOld"))
+        .style("font-size", fontSize + "em")
     })
     // @ts-ignore
     .call(drag(simulation))
@@ -227,10 +253,10 @@
     .attr("dx", 0)
     .attr("dy", (d) => -nodeRadius(d) + "px")
     .attr("text-anchor", "middle")
-    .text((d) => data[d.id]?.title || (d.id.charAt(1).toUpperCase() + d.id.slice(2)).replace("-", " "))
-    .style('opacity', (opacityScale - 1) / 3.75)
+    .text((d) => d.text)
+    .style("opacity", (opacityScale - 1) / 3.75)
     .style("pointer-events", "none")
-    .style('font-size', fontSize + 'em')
+    .style("font-size", fontSize + "em")
     .raise()
     // @ts-ignore
     .call(drag(simulation))
@@ -248,7 +274,7 @@
         .on("zoom", ({ transform }) => {
           link.attr("transform", transform)
           node.attr("transform", transform)
-          const scale = transform.k * opacityScale;
+          const scale = transform.k * opacityScale
           const scaledOpacity = Math.max((scale - 1) / 3.75, 0)
           labels.attr("transform", transform).style("opacity", scaledOpacity)
         }),
@@ -262,17 +288,13 @@
       .attr("y1", (d: any) => d.source.y)
       .attr("x2", (d: any) => d.target.x)
       .attr("y2", (d: any) => d.target.y)
-    node
-      .attr("cx", (d: any) => d.x)
-      .attr("cy", (d: any) => d.y)
-    labels
-      .attr("x", (d: any) => d.x)
-      .attr("y", (d: any) => d.y)
+    node.attr("cx", (d: any) => d.x).attr("cy", (d: any) => d.y)
+    labels.attr("x", (d: any) => d.x).attr("y", (d: any) => d.y)
   })
 }
 
 function renderGlobalGraph() {
-  const slug = document.body.dataset["slug"]!
+  const slug = getFullSlug(window)
   const container = document.getElementById("global-graph-outer")
   const sidebar = container?.closest(".sidebar") as HTMLElement
   container?.classList.add("active")
@@ -304,4 +326,3 @@
   containerIcon?.removeEventListener("click", renderGlobalGraph)
   containerIcon?.addEventListener("click", renderGlobalGraph)
 })
-

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