From d1e708cb808a1a283fd0d013e0b38dc056c8e056 Mon Sep 17 00:00:00 2001
From: yutent <yutent.io@gmail.com>
Date: Thu, 8 Jun 2023 12:45:35 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AE=8C=E6=88=90=E7=94=BB=E5=9B=BE?=
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Content-Type: text/plain; charset=UTF-8
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---
 apps/api.js |  11 +++---
 lib/svg.js  | 100 ++++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 101 insertions(+), 10 deletions(-)

diff --git a/apps/api.js b/apps/api.js
index 524b4c0..1586b36 100644
--- a/apps/api.js
+++ b/apps/api.js
@@ -15,7 +15,6 @@ export default class Github extends Controller {
   async toplangsAction() {
     let { username, count = 6 } = this.request.get()
     let token = this.context.get('token')
-
     let { data } = await fetch('https://api.github.com/graphql', {
       headers: {
         Authorization: 'Bearer ' + token,
@@ -50,6 +49,12 @@ query {
     let dict = {}
     let langs = []
 
+    if (count > 16) {
+      count = 16
+    } else if (count < 2) {
+      count = 2
+    }
+
     nodes.forEach(it => {
       for (let lang of it.languages.edges) {
         if (dict[lang.node.name]) {
@@ -67,8 +72,6 @@ query {
     langs.sort((a, b) => b.size - a.size)
 
     this.response.set('Content-Type', 'image/svg+xml')
-    this.response.end(render({}))
-
-    // this.response.send(200, { langs: langs.slice(0, count) })
+    this.response.end(render({ langs: langs.slice(0, count) }))
   }
 }
diff --git a/lib/svg.js b/lib/svg.js
index e02e35b..025bead 100644
--- a/lib/svg.js
+++ b/lib/svg.js
@@ -7,29 +7,117 @@
 function html(strs, ...vals) {
   let output = ''
   for (let it of strs) {
-    output += it + (vals.shift() || '')
+    output += it + (vals.shift() ?? '')
   }
   return output
 }
 
-export function render({ title = 'Most Used Languages' }) {
+function text({ color, name, pc, idx }) {
+  let y = 32 + ~~(idx / 2 + 1) * 36
+  let x1 = idx % 2 === 0 ? 27 : 227
+  let x2 = idx % 2 === 0 ? 44 : 244
+  return html`
+    <g class="lang">
+      <circle cx="${x1}" cy="${y}" r="5" fill="${color}" />
+      <text x="${x2}" y="${y + 4}">${name} ${pc}%</text>
+    </g>
+  `
+}
+
+function pie(langs = [], sum = 0, height) {
+  // 圆心坐标
+  let cx = 540
+  let radius = ~~((height - 64) / 2) // 最小半径
+  let cy = radius + 48
+  let per = 0.25
+  let deg = per * 2 * Math.PI // 从90度开始计算
+
+  return langs
+    .map((it, idx) => {
+      // 扇形起始坐标
+      let r = +radius.toFixed(3)
+      let lx = +(cx + Math.sin(deg) * r).toFixed(3)
+      let ly = +(cy - Math.cos(deg) * r).toFixed(3)
+      let nx, ny
+      let _per = +(it.size / sum).toFixed(4)
+
+      radius *= 1.05
+      per += _per
+      deg = per * 2 * Math.PI
+      nx = +(cx + Math.sin(deg) * r * (per > 0.5 ? 1 : -1)).toFixed(3)
+      ny = +(cy - Math.cos(deg) * r).toFixed(3)
+
+      return html`
+        <path
+          class="pie pie-${idx}"
+          d="M${cx} ${cy} L${lx} ${ly} A${r} ${r} 0 ${_per > 0.5
+            ? 1
+            : 0} 1 ${nx} ${ny} Z"
+          fill="${it.color}"
+        />
+      `
+    })
+    .join('')
+}
+
+export function render({ title = 'Most Used Languages', langs = [] } = {}) {
+  let sum = langs.reduce((n, it) => n + it.size, 0)
+  let height = ~~(langs.length / 2 + 1) * 36 + 32
+  if (height < 140) {
+    height = 140
+  }
+
   return html`
     <svg
-      width="600"
-      height="400"
-      viewBox="0 0 600 400"
+      width="800"
+      height="${height}"
+      viewBox="0 0 800 ${height}"
       fill="none"
       xmlns="http://www.w3.org/2000/svg"
     >
       <style>
         .header {
-          font: bold 20px 'Segoe UI', Ubuntu, Sans-Serif;
+          font: bold 22px 'Segoe UI', Ubuntu, Sans-Serif;
           fill: #64b5f6;
         }
+        .lang {
+          font: 14px Menlo, Monaco, Consolas, 'Courier New', monospace;
+          fill: #64748b;
+        }
+        .pie {
+          opacity: 0;
+          animation: fade 0.5s ease-in-out forwards;
+        }
+        ${langs
+            .map((it, i) => `.pie-${i} {animation-delay: ${i * 100}ms}`)
+            .join('\n')}
+          @keyframes
+          fade {
+          from {
+            opacity: 0;
+          }
+          to {
+            opacity: 1;
+          }
+        }
       </style>
       <g transform="translate(24, 32)">
         <text class="header">${title}</text>
       </g>
+      <g class="lang-list">
+        ${langs
+          .map((it, idx) =>
+            text({
+              color: it.color,
+              name: it.name,
+              pc: +((100 * it.size) / sum).toFixed(2),
+              idx
+            })
+          )
+          .join('')}
+      </g>
+
+      <g class="lang-pie">${pie(langs, sum, height)}</g>
     </svg>
   `
 }