Exposes Twav expansion via CLI script

THe plan is to eventually expose more sub-commands,
and I am aware I'm currently misusing Commander for that end goal.

bin/audiomoth-utils.js

@@ -1,18 +1,79 @@
 #!/usr/bin/env node
 
-const { Command } = require("commander");
+const { Command, Option } = require("commander");
+const audiomothUtils = require("audiomoth-utils");
+
 const program = new Command();
 
 program
-  .version("1.0.0")
-  .description("A simple hello-world CLI")
-  .argument("<name>", "name to greet")
-  .option("-u, --uppercase", "convert name to uppercase")
-  .action((name, options) => {
-    if (options.uppercase) {
-      name = name.toUpperCase();
+  .description(
+    "Expand an AudioMoth T.WAV recording (a recording with amplitude thresholding or frequency triggering applied)"
+  ) // TODO use addCommand to handle the subcommands
+  .arguments("<subcommand> <inputFile>")
+  .option(
+    "-d, --destination [outputPath]",
+    "output directory to write expansions. If omitted, dump expanded files in the same folder as inputFile."
+  )
+  .option(
+    "--prefix [prefix]",
+    "optional string (not including '_') to prefix to expanded filenames that will be created."
+  )
+  .addOption(
+    new Option(
+      "--max-file-duration [seconds]",
+      "max duration of expanded file to write, in seconds"
+    )
+      .argParser(parseInt)
+      .default(5)
+  )
+  .option("--generate-silent-files", "generate silent files", false)
+  .option("--align-to-second-transitions", "align to second transitions", false)
+  .action((subcommand, inputFile, options) => {
+    const {
+      destination,
+      prefix,
+      maxFileDuration,
+      generateSilentFiles,
+      alignToSecondTransitions,
+    } = options;
+
+    // Determine expansionType based on command
+    let expansionType;
+    switch (subcommand) {
+      case "expand-duration":
+        expansionType = "DURATION";
+        break;
+      case "expand-event":
+        expansionType = "EVENT";
+        break;
+      default:
+        console.error("Invalid subcommand");
+        process.exit(9);
+    }
+
+    // Call the expand function with the provided arguments and options
+    try {
+      const result = audiomothUtils.expand(
+        inputFile,
+        destination, // optional
+        prefix, // optional
+        expansionType,
+        maxFileDuration,
+        generateSilentFiles,
+        alignToSecondTransitions
+      );
+
+      if (result?.success) {
+        console.log("Expansion completed successfully.");
+        process.exit(0); // Exit with code 0 if success is true
+      } else {
+        console.error("Expansion failed:", result?.error);
+        process.exit(1); // Exit with code 1 if success is false
+      }
+    } catch (err) {
+      console.error("Error:", err);
+      process.exit(7); // Exit with code 7 if an exception occurred
     }
-    console.log(`Hello, ${name}!`);
   });
 
 program.parse(process.argv);

package.json

@@ -10,6 +10,7 @@
     "build": "pkg . --targets node14-linux-x64,node14-win-x64 --out-path  dist"
   },
   "dependencies": {
+    "audiomoth-utils": "1.5.0",
     "commander": "^12.1.0"
   },
   "devDependencies": {