Support multiple expenses in one reimburesement

lib/contracts/reimbursement.js

@@ -9,7 +9,10 @@ class Reimbursement extends Record {
   getById (id) {
     return this.functions.get(id)
       .then(data => {
-        return this.ipfs.catAndMerge(data, ExpenseSerializer.deserialize);
+        return this.ipfs.catAndMerge(data, (ipfsDocument) => {
+          const expenses = JSON.parse(ipfsDocument);
+          return { expenses };
+        });
       });
   }
 
@@ -18,26 +21,32 @@ class Reimbursement extends Record {
   }
 
   async add (attrs, callOptions = {}) {
-    const reimbursement = new ExpenseSerializer(attrs);
+    const amount = parseInt(attrs.amount);
+    const token = attrs.token;
+    const recipient = attrs.recipient;
+    const expenses = attrs.expenses.map( e => new ExpenseSerializer(e) );
 
-    try { await reimbursement.validate(); }
-    catch (error) { return Promise.reject(error); }
+    if (!amount > 0 || !token || token === '' || !recipient || recipient === '' || !expenses.length > 0) {
+      return Promise.reject(new Error('Invalid data. amount, token, expenses is required.'));
+    }
 
-    const jsonStr = reimbursement.serialize();
+    return Promise.all(expenses.map(e => e.validate()))
+      .then(() => {
+        const jsonStr = JSON.stringify(expenses.map(e => e.data), null, 2);
+        return this.ipfs
+          .add(jsonStr)
+          .then(ipfsHashAttr => {
+            let reimbursement = [
+              amount,
+              token,
+              recipient,
+              ipfsHashAttr.hashDigest,
+              ipfsHashAttr.hashFunction,
+              ipfsHashAttr.hashSize,
+            ];
 
-    return this.ipfs
-      .add(jsonStr)
-      .then(ipfsHashAttr => {
-        let reimbursement = [
-          attrs.amount,
-          attrs.token,
-          ipfsHashAttr.hashDigest,
-          ipfsHashAttr.hashFunction,
-          ipfsHashAttr.hashSize,
-        ];
-
-        console.log(reimbursement)
-        return this.functions.add(...reimbursement, callOptions);
+            return this.functions.add(...reimbursement, callOptions);
+          });
       });
   }
 }