finalize multi-device

WASignalGroup/sender_key_record.js

@@ -0,0 +1,54 @@
+const SenderKeyState = require('./sender_key_state');
+
+class SenderKeyRecord {
+    MAX_STATES = 5;
+  
+    constructor(serialized) {
+      this.senderKeyStates = [];
+  
+      if (serialized) {
+        const list = serialized;
+        for (let i = 0; i < list.length; i++) {
+          const structure = list[i];
+          this.senderKeyStates.push(
+            new SenderKeyState(null, null, null, null, null, null, structure)
+          );
+        }
+      }
+    }
+  
+    isEmpty() {
+      return this.senderKeyStates.length === 0;
+    }
+  
+    getSenderKeyState(keyId) {
+      if (!keyId && this.senderKeyStates.length) return this.senderKeyStates[0];
+      for (let i = 0; i < this.senderKeyStates.length; i++) {
+        const state = this.senderKeyStates[i];
+        if (state.getKeyId() === keyId) {
+          return state;
+        }
+      }
+      throw new Error(`No keys for: ${keyId}`);
+    }
+  
+    addSenderKeyState(id, iteration, chainKey, signatureKey) {
+      this.senderKeyStates.push(new SenderKeyState(id, iteration, chainKey, null, signatureKey));
+    }
+  
+    setSenderKeyState(id, iteration, chainKey, keyPair) {
+      this.senderKeyStates.length = 0;
+      this.senderKeyStates.push(new SenderKeyState(id, iteration, chainKey, keyPair));
+    }
+  
+    serialize() {
+      const recordStructure = [];
+      for (let i = 0; i < this.senderKeyStates.length; i++) {
+        const senderKeyState = this.senderKeyStates[i];
+        recordStructure.push(senderKeyState.getStructure());
+      }
+      return recordStructure;
+    }
+  }
+  
+  module.exports = SenderKeyRecord;