feat: initial version

update_ts.mjs

@@ -0,0 +1,79 @@
+import fs from "fs/promises";
+import ExifReader from "exifreader";
+import path from "path";
+
+if (process.argv.length === 2) {
+  console.error("Expected exactly one argument");
+  process.exit(1);
+}
+const dir = process.argv[2];
+
+let fileNames;
+try {
+  fileNames = await fs.readdir(dir);
+} catch (error) {
+  console.error("Error reading directory.", error);
+  process.exit(2);
+}
+
+/**
+ * @param fileName {string}
+ * @return {Date|null}
+ */
+function getDateFromFileName(fileName) {
+  const r = /(\d{4})-?(\d{2})-?(\d{2})[_\-](\d{2})-?(\d{2})-?(\d{2})/.exec(
+    fileName,
+  );
+  if (!r) throw new Error("The file name did not match the pattern.");
+
+  return new Date(`${r[1]}-${r[2]}-${r[3]}T${r[4]}:${r[5]}:${r[6]}`);
+}
+
+/**
+ * @param filePath {string}
+ * @param fileName {string}
+ * @return {Promise<Date|null>}
+ */
+async function getDate(filePath, fileName) {
+  if (/\.mp4$/.test(fileName)) {
+    return getDateFromFileName(fileName);
+  }
+
+  const tags = await ExifReader.load(filePath);
+  let timeString = tags.DateTime?.value[0];
+  if (timeString === undefined) {
+    return getDateFromFileName(fileName);
+  }
+
+  const exifDate = new Date(
+    timeString.replace(
+      /(\d{4}):(\d{2}):(\d{2}) (\d{2}):(\d{2}):(\d{2})/,
+      "$1-$2-$3T$4:$5:$6",
+    ),
+  );
+
+  if (isNaN(exifDate.getTime()) || exifDate.getFullYear() < 2000) {
+    return getDateFromFileName(fileName);
+  }
+
+  return exifDate;
+}
+
+for (const fileName of fileNames) {
+  const filePath = path.resolve(dir, fileName);
+
+  let date;
+  try {
+    date = await getDate(filePath, fileName);
+  } catch (error) {
+    console.error(filePath, error.message);
+    continue;
+  }
+  if (date === null) {
+    console.error(filePath, "Could not get a date.");
+    continue;
+  }
+  console.log(filePath, date);
+
+  await fs.utimes(filePath, date, date);
+}