Refactor action to typescript (#226)

* Refactor to typescript (config part)

* Refactor to typescript (convert extensions, minor fixes)

* Refactor to typescript (move from `action` to `dist`)

* Re-enable integrity-check for dist index.js

* Fix all tests and lints

* fix parsing major versions

* Test patch level to be digits only

* debug

* debug

* uncache

* manual compile

* debug

* debug

* Debug

* Build lib - doh

* remove diff check

* Make kubernetes workflow manual

* Properly generate 3 digit for simple major tags

* Remove ts-ignore

* re-enable cache

src/model/android-versioning.ts

@@ -0,0 +1,32 @@
+import * as core from '@actions/core';
+import * as semver from 'semver';
+
+export default class AndroidVersioning {
+  static determineVersionCode(version, inputVersionCode) {
+    if (!inputVersionCode) {
+      return AndroidVersioning.versionToVersionCode(version);
+    }
+    return inputVersionCode;
+  }
+
+  static versionToVersionCode(version) {
+    const parsedVersion = semver.parse(version);
+
+    if (!parsedVersion) {
+      core.warning(`Could not parse "${version}" to semver, defaulting android version code to 1`);
+      return 1;
+    }
+
+    // The greatest value Google Plays allows is 2100000000.
+    // Allow for 3 patch digits, 3 minor digits and 3 major digits.
+    const versionCode = parsedVersion.major * 1000000 + parsedVersion.minor * 1000 + parsedVersion.patch;
+
+    if (versionCode >= 1000000000) {
+      throw new Error(
+        `Generated versionCode ${versionCode} is dangerously close to the maximum allowed number 2100000000. Consider a different versioning scheme to be able to continue updating your application.`,
+      );
+    }
+    core.info(`Using android versionCode ${versionCode}`);
+    return versionCode;
+  }
+}