feat: added Top languages card

api/top-langs.js

@@ -0,0 +1,44 @@
+require("dotenv").config();
+const { renderError, clampValue, CONSTANTS } = require("../src/utils");
+const fetchTopLanguages = require("../src/fetchTopLanguages");
+const renderTopLanguages = require("../src/renderTopLanguages");
+
+module.exports = async (req, res) => {
+  const {
+    username,
+    card_width,
+    title_color,
+    text_color,
+    bg_color,
+    theme,
+    cache_seconds,
+  } = req.query;
+  let topLangs;
+
+  res.setHeader("Content-Type", "image/svg+xml");
+
+  try {
+    topLangs = await fetchTopLanguages(username);
+  } catch (err) {
+    return res.send(renderError(err.message));
+  }
+
+  const cacheSeconds = clampValue(
+    parseInt(cache_seconds || CONSTANTS.THIRTY_MINUTES, 10),
+    CONSTANTS.THIRTY_MINUTES,
+    CONSTANTS.ONE_DAY
+  );
+
+  res.setHeader("Cache-Control", `public, max-age=${cacheSeconds}`);
+
+  res.send(
+    renderTopLanguages(topLangs, {
+      theme,
+      card_width: parseInt(card_width, 10),
+      title_color,
+      text_color,
+      bg_color,
+      theme,
+    })
+  );
+};

src/fetchTopLanguages.js

@@ -0,0 +1,84 @@
+const { request } = require("./utils");
+const retryer = require("./retryer");
+require("dotenv").config();
+
+const fetcher = (variables, token) => {
+  return request(
+    {
+      query: `
+      query userInfo($login: String!) {
+        user(login: $login) {
+          repositories(isFork: false, first: 100) {
+            nodes {
+              languages(first: 1) {
+                edges {
+                  size
+                  node {
+                    color
+                    name
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+      `,
+      variables,
+    },
+    {
+      Authorization: `bearer ${token}`,
+    }
+  );
+};
+
+async function fetchTopLanguages(username) {
+  if (!username) throw Error("Invalid username");
+
+  let res = await retryer(fetcher, { login: username });
+
+  if (res.data.errors) {
+    console.log(res.data.errors);
+    throw Error(res.data.errors[0].message || "Could not fetch user");
+  }
+
+  let repoNodes = res.data.data.user.repositories.nodes;
+
+  // TODO: perf improvement
+  repoNodes = repoNodes
+    .filter((node) => {
+      return node.languages.edges.length > 0;
+    })
+    .sort((a, b) => {
+      return b.languages.edges[0].size - a.languages.edges[0].size;
+    })
+    .map((node) => {
+      return node.languages.edges[0];
+    })
+    .reduce((acc, prev) => {
+      let langSize = prev.size;
+      if (acc[prev.node.name] && prev.node.name === acc[prev.node.name].name) {
+        langSize = prev.size + acc[prev.node.name].size;
+      }
+
+      return {
+        ...acc,
+        [prev.node.name]: {
+          name: prev.node.name,
+          color: prev.node.color,
+          size: langSize,
+        },
+      };
+    }, {});
+
+  const topLangs = Object.keys(repoNodes)
+    .slice(0, 5)
+    .reduce((result, key) => {
+      result[key] = repoNodes[key];
+      return result;
+    }, {});
+
+  return topLangs;
+}
+
+module.exports = fetchTopLanguages;

src/renderTopLanguages.js

@@ -0,0 +1,67 @@
+const { getCardColors, FlexLayout, clampValue } = require("../src/utils");
+
+const createProgressNode = ({ width, color, name, progress }) => {
+  const paddingRight = 95;
+  const progressTextX = width - paddingRight + 10;
+  const progressWidth = width - paddingRight;
+  const progressPercentage = clampValue(progress, 2, 100);
+
+  return `
+    <text x="2" y="15" class="lang-name">${name}</text>
+    <text x="${progressTextX}" y="34" class="lang-name">${progress}%</text>
+    <svg width="${progressWidth}">
+      <rect rx="5" ry="5" x="0" y="25" width="${progressWidth}" height="8" fill="#ddd"></rect>
+      <rect rx="5" ry="5" x="0" y="25" width="${progressPercentage}%" height="8" fill="${color}"></rect>
+    </svg>
+  `;
+};
+
+const renderTopLanguages = (topLangs, options = {}) => {
+  const { title_color, text_color, bg_color, theme, card_width } = options;
+
+  const langs = Object.values(topLangs);
+
+  const totalSize = langs.reduce((acc, curr) => {
+    return acc + curr.size;
+  }, 0);
+
+  // returns theme based colors with proper overrides and defaults
+  const { titleColor, textColor, bgColor } = getCardColors({
+    title_color,
+    text_color,
+    bg_color,
+    theme,
+  });
+
+  const width = isNaN(card_width) ? 300 : card_width;
+  const height = 45 + (langs.length + 1) * 40;
+
+  return `
+    <svg width="${width}" height="${height}" viewBox="0 0 ${width} ${height}" fill="none" xmlns="http://www.w3.org/2000/svg">
+      <style>
+        .header { font: 600 18px 'Segoe UI', Ubuntu, Sans-Serif; fill: ${titleColor} }
+        .lang-name { font: 400 11px 'Segoe UI', Ubuntu, Sans-Serif; fill: ${textColor} }
+      </style>
+      <rect data-testid="card-bg" x="0.5" y="0.5" width="99.7%" height="99%" rx="4.5" fill="${bgColor}" stroke="#E4E2E2"/>
+
+      <text x="25" y="35" class="header">Top Languages</text>
+
+      <svg x="25" y="55">
+      ${FlexLayout({
+        items: langs.map((lang) => {
+          return createProgressNode({
+            width: width,
+            name: lang.name,
+            color: lang.color || "#858585",
+            progress: ((lang.size / totalSize) * 100).toFixed(2),
+          });
+        }),
+        gap: 40,
+        direction: "column",
+      })}
+      </svg>
+    </svg>
+  `;
+};
+
+module.exports = renderTopLanguages;