commit 8e9398bd020ea292a25a5e8d8de88ccb5d35507d
Author: Kai Moschcau <mail@kmoschcau.de>
Date:   Sun Feb 18 15:00:07 2024 +0100

    feat: initial version

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2ccbe46
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/node_modules/
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..c1e532c
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,30 @@
+{
+  "name": "Downloads",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "exifreader": "^4.21.0"
+      }
+    },
+    "node_modules/@xmldom/xmldom": {
+      "version": "0.8.10",
+      "resolved": "https://registry.npmjs.org/@xmldom/xmldom/-/xmldom-0.8.10.tgz",
+      "integrity": "sha512-2WALfTl4xo2SkGCYRt6rDTFfk9R1czmBvUQy12gK2KuRKIpWEhcbbzy8EZXtz/jkRqHX8bFEc6FC1HjX4TUWYw==",
+      "optional": true,
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
+    "node_modules/exifreader": {
+      "version": "4.21.0",
+      "resolved": "https://registry.npmjs.org/exifreader/-/exifreader-4.21.0.tgz",
+      "integrity": "sha512-A/EjsCKdfzzF2lvi+iu2klTOZNYf3MrXJAYKX+NyJn35wlujGmbDGVvZ+21FYy3ZxsWHwf37VntgMrQXFuR5sA==",
+      "hasInstallScript": true,
+      "optionalDependencies": {
+        "@xmldom/xmldom": "^0.8.10"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..68c9e69
--- /dev/null
+++ b/package.json
@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "exifreader": "^4.21.0"
+  }
+}
diff --git a/update_ts.mjs b/update_ts.mjs
new file mode 100644
index 0000000..999e8bf
--- /dev/null
+++ b/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);
+}