From 4ee0166bd2e560cbd8976f208049a5cc31c365c0 Mon Sep 17 00:00:00 2001
From: Alexander Cerutti <cerutti.alexander@gmail.com>
Date: Sun, 30 Jul 2023 12:48:45 +0200
Subject: [PATCH] Fixed model loading and accessing when function is deployed

---
 examples/firebase/firebase.json          |  6 +++++-
 examples/firebase/functions/src/index.ts | 20 +++++++++++++++++++-
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/examples/firebase/firebase.json b/examples/firebase/firebase.json
index 444a9a6..21fd26f 100644
--- a/examples/firebase/firebase.json
+++ b/examples/firebase/firebase.json
@@ -9,7 +9,11 @@
 				"firebase-debug.log",
 				"firebase-debug.*.log"
 			],
-			"predeploy": ["npm --prefix \"$RESOURCE_DIR\" run build"]
+			"predeploy": [
+				"cp -r ../models functions/models",
+				"npm --prefix \"$RESOURCE_DIR\" run build"
+			],
+			"postdeploy": ["rm -rf functions/models"]
 		}
 	],
 	"storage": {
diff --git a/examples/firebase/functions/src/index.ts b/examples/firebase/functions/src/index.ts
index c176bf0..de570ec 100644
--- a/examples/firebase/functions/src/index.ts
+++ b/examples/firebase/functions/src/index.ts
@@ -47,6 +47,9 @@ declare global {
 			SIGNER_CERT: string;
 			SIGNER_KEY: string;
 			SIGNER_KEY_PASSPHRASE: string;
+
+			// reserved, but we use it to discriminate emulator from deploy
+			FUNCTIONS_EMULATOR: "true" | "false" | undefined;
 		}
 	}
 }
@@ -60,6 +63,21 @@ const storageRef = getStorage().bucket();
 
 export const pass = functions.https.onRequest(
 	async (request: RequestWithBody, response) => {
+		let modelBasePath: string;
+
+		if (process.env.FUNCTIONS_EMULATOR === "true") {
+			modelBasePath = "../../models/";
+		} else {
+			/**
+			 * Models are cloned on deploy through
+			 * the commands in `firebase.json` and
+			 * are uploaded along with our program.
+			 *
+			 * When deployed, root folder is the `functions` folder
+			 */
+			modelBasePath = "./models/";
+		}
+
 		try {
 			if (request.headers["content-type"] !== "application/json") {
 				response.status(400);
@@ -91,7 +109,7 @@ export const pass = functions.https.onRequest(
 					 * Get relevant pass model from model folder (see passkit-generator/examples/models/)
 					 * Path seems to get read like the function is in "firebase/" folder and not in "firebase/functions/"
 					 */
-					model: `../../models/${request.body.passModel}.pass`,
+					model: `${modelBasePath}${request.body.passModel}.pass`,
 					certificates: {
 						// Assigning certificates from certs folder (you will need to provide these yourself)
 						wwdr: process.env.WWDR,