first commit

.gitignore

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+node_modules/
+themes/
+assets/
+.env
+package-lock.json

index.js

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+import fs from 'fs';
+import path from 'path';
+import FormData from 'form-data';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+const instance = process.env.NEXTCLOUD_INSTANCE;
+const username = process.env.NEXTCLOUD_LOGIN;
+const appPassword = process.env.NEXTCLOUD_PASSWORD;
+const __dirname = import.meta.dirname;
+
+const authHeader = "Basic " + Buffer.from(`${username}:${appPassword}`).toString("base64");
+
+function dir_project(after) {
+  return path.join(__dirname, after)
+}
+
+function readDir(path, options) {
+  return new Promise((res, rej) => {
+    fs.readdir(path, options, (err, files) => {
+      if (err) rej(err)
+      else res(files)
+    });
+  })
+}
+
+function readFile(path, options) {
+  return new Promise((res, rej) => {
+    fs.readFile(path, options, (err, data) => {
+      if (err) rej(err)
+      else res(data)
+    });
+  })
+}
+
+function writeFile(path, data, options) {
+  return new Promise((res, rej) => {
+    fs.writeFile(path, data, options, (err, data) => {
+      if (err) rej(err)
+      else res(data)
+    });
+  })
+}
+
+function randomItem(array) {
+  return array[Math.floor((Math.random() * array.length))];
+}
+
+
+
+async function updateTheming(object) {
+  let kvPairs = Object.entries(object)
+
+  for (const [setting, value] of kvPairs) {
+    await fetch(`https://${instance}/apps/theming/ajax/updateStylesheet`, {
+      method: "POST",
+      headers: {
+        "Accept": "application/json",
+        "Content-Type": "application/json",
+        "Authorization": authHeader,
+        "OCS-APIRequest": "true"
+      },
+      body: JSON.stringify({ setting, value })
+    });
+  }
+}
+
+async function uploadImage({ image, filename, contentType }) {
+  const imageBuffer = await readFile(dir_project(image))
+
+  const form = new FormData();
+  form.append('key', 'background');
+  form.append('image', imageBuffer, { filename, contentType });
+
+  const response = await fetch(`https://${instance}/apps/theming/ajax/uploadImage`, {
+    method: "POST",
+    headers: {
+      "Accept": "application/json",
+      "Authorization": authHeader,
+      "OCS-APIRequest": "true",
+      ...form.getHeaders()
+    },
+    body: form.getBuffer()
+  });
+
+  return await response.text()
+}
+
+function convertTheme(theme = "") {
+  let themeData = theme.split("\n");
+
+  return {
+    theme: {
+      name: themeData[0],
+      slogan: themeData[1],
+      primary_color: themeData[5]
+    },
+    background: {
+      image: themeData[2],
+      filename: themeData[3],
+      contentType: themeData[4],
+    }
+  }
+}
+
+async function getTodaysTheme() {
+  const directory = await readDir(dir_project("/themes/"));
+
+  const lastTheme = await readFile(dir_project("last_theme.txt"), {
+    encoding: "utf-8"
+  });
+
+  // let themeFileName = "test.txt"
+
+  let i = 50
+  let themeFileName = lastTheme
+  while (themeFileName == lastTheme) {
+    themeFileName = randomItem(directory);
+    if (i < 0) break
+    i--
+  }
+
+  await writeFile(dir_project("last_theme.txt"), themeFileName, {
+    encoding: "utf-8"
+  })
+
+  const themeFile = await readFile(dir_project("/themes/" + themeFileName), {
+    encoding: "utf-8"
+  });
+
+  const parsedTheme = convertTheme(themeFile);
+
+  return parsedTheme
+}
+
+
+
+async function updateNextcloud() {
+  const todaysTheme = await getTodaysTheme();
+
+  await updateTheming(todaysTheme.theme);
+
+  await uploadImage(todaysTheme.background);
+}
+
+updateNextcloud()

last_theme.txt

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+caillougetsgrounded.txt

package.json

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+{
+  "name": "nextcloud-themer",
+  "version": "1.0.0",
+  "scripts": {
+    "dev": "node index.js"
+  },
+  "license": "KKPL-v2.2",
+  "type": "module",
+  "dependencies": {
+    "dotenv": "^16.4.7",
+    "form-data": "^4.0.1"
+  }
+}