Server: Implement get version

server/src/org/isoron/uhabits/sync/app/StorageModule.kt

@@ -50,5 +50,14 @@ fun Routing.storage(app: SyncApplication) {
                 call.respond(HttpStatusCode.Conflict, currData)
             }
         }
+        get("version") {
+            val key = call.parameters["key"]!!
+            try {
+                val data = app.server.get(key)
+                call.respond(HttpStatusCode.OK, data.version)
+            } catch(e: KeyNotFoundException) {
+                call.respond(HttpStatusCode.NotFound)
+            }
+        }
     }
 }

server/test/org/isoron/uhabits/sync/app/StorageModuleTest.kt

@@ -41,6 +41,17 @@ class StorageModuleTest : BaseApplicationTest() {
         }
     }
 
+    @Test
+    fun `when get version succeeds should return version`() {
+        `when`(server.get("k1")).thenReturn(data1)
+        withTestApplication(app()) {
+            handleGet("/db/k1/version").apply {
+                assertEquals(HttpStatusCode.OK, response.status())
+                assertEquals("1", response.content)
+            }
+        }
+    }
+
     @Test
     fun `when get with invalid key should return 404`() {
         `when`(server.get("k1")).thenThrow(KeyNotFoundException())