images.js

images.js

@@ -0,0 +1,50 @@
+#!/usr/bin/env node
+
+const fs = require('fs');
+const readline = require('readline');
+
+// https://stackoverflow.com/questions/19269545/how-to-get-a-number-of-random-elements-from-an-array/19270021#19270021
+function getRandom(arr, n) {
+  var result = new Array(n),
+    len = arr.length,
+    taken = new Array(len);
+  if (n > len)
+    throw new RangeError("getRandom: more elements taken than available");
+  while (n--) {
+    var x = Math.floor(Math.random() * len);
+    result[n] = arr[x in taken ? taken[x] : x];
+    taken[x] = --len in taken ? taken[len] : len;
+  }
+  return result;
+}
+
+(async () => {
+
+// Get images.
+let imageRe = /^image::{china-dictatorship-media-base}\/([^/[]+)/;
+let images = new Set();
+const fileStream = fs.createReadStream('README.adoc');
+const rl = readline.createInterface({
+  input: fileStream,
+  crlfDelay: Infinity
+});
+for await (const line of rl) {
+  let match = imageRe.exec(line);
+  if (match !== null) {
+    images.add(match[1]);
+  }
+}
+images = Array.from(images);
+if (process.argv.length > 2) {
+  images = getRandom(images, parseInt(process.argv[2]));
+} else {
+  images.sort();
+}
+full_images = []
+for (const image of images) {
+  const url = `https://raw.githubusercontent.com/cirosantilli/china-dictatorship-media/master/${image}`;
+  full_images.push(image.replace(/[_.]/g, ' '));
+  full_images.push(`<img src="${url}" width="600">`);
+}
+console.log(full_images.join('\n\n'));
+})()