Better error handling

javascript/fh_sdk.js

@@ -1,3 +1,13 @@
+class ValidationError extends Error {
+    constructor(message) {
+        if (!message) {
+            message = "ValidationError";
+        }
+        super(message);
+        this.name = "ValidationError";
+    }
+}
+
 class PlayerNotFoundError extends Error {
     constructor(message) {
         if (!message) {
@@ -65,6 +75,10 @@ class FairHopper {
             headers: this.defaultHeaders,
             body: JSON.stringify(payload),
         });
+        switch (r.status) {
+            case 422:
+                throw new ValidationError();
+        }
         return await r.json();
     }
 
@@ -84,6 +98,8 @@ class FairHopper {
                 throw new PlayerInactiveError();
             case 404:
                 throw new PlayerNotFoundError();
+            case 422:
+                throw new ValidationError();
         }
         return await r.json();
     }
@@ -117,6 +133,8 @@ class FairHopper {
                 throw new PlayerNotFoundError();
             case 409:
                 throw new PositionError();
+            case 422:
+                throw new ValidationError();
         }
         return await r.json();
     }
@@ -128,6 +146,17 @@ class FairHopper {
         return await r.json();
     }
 
+    async getProduct(productId) {
+        const r = await fetch(this.formatUrl(`/products/${productId}`), {
+            headers: this.defaultHeaders,
+        });
+        switch (r.status) {
+            case 422:
+                throw new ValidationError();
+        }
+        return await r.json();
+    }
+
     async purchaseProduct(playerId, productId) {
         const url = this.formatUrl(`/player/${playerId}/product/purchase`);
         const postData = {
@@ -145,6 +174,8 @@ class FairHopper {
                 throw new PlayerNotFoundError();
             case 409:
                 throw new PositionError();
+            case 422:
+                throw new ValidationError();
         }
         return await r.json();
     }