Created initial patch and delete and updated get endpoints

src/main/kotlin/routes/LibraryRoutes.kt

@@ -33,8 +33,20 @@ fun Application.configureLibraryRoutes(dbConnection: Connection) {
             }
         }
 
+        get("/libraries/{id}") {
+            try {
+                val id = call.pathParameters["id"]!!.toLong()
+                val library = libraryService.readLibraryById(id)
+                call.respond(HttpStatusCode.OK, library)
+            } catch (cause: DbElementNotFoundException) {
+                call.respond(HttpStatusCode.BadRequest, cause.message ?: "Unable to find Library.")
+            } catch (cause: NumberFormatException) {
+                call.respond(HttpStatusCode.BadRequest, "Unable to parse number format. \"${call.pathParameters["id"]}\" is not a number.")
+            }
+        }
+
         get("/libraries/{libraryId}/items/{itemId}") {
-            call.respondText("You asked for ${call.parameters["itemId"]} from ${call.parameters["libraryId"]}")
+            // TODO Add search for collection_it where itemID && libraryID
         }
 
         post("/libraries") {
@@ -48,12 +60,36 @@ fun Application.configureLibraryRoutes(dbConnection: Connection) {
         }
 
         patch("/libraries") {
-            val library = call.receive<Library>()
+            try {
-            call.respondText("${library.name} is patched")
+                val library = call.receive<Library>()
+                val patchedLibrary = libraryService.update(library)
+                call.respond(HttpStatusCode.OK, patchedLibrary)
+            } catch (cause: DbElementInsertionException) {
+                log.error(cause.message)
+                call.respond(HttpStatusCode.BadRequest, cause.message ?: "Unable to update Library.")
+            } catch (cause: DbElementInsertionException) {
+                log.error(cause.message)
+                call.respond(HttpStatusCode.BadRequest, cause.message ?: "Bad Arguments")
+            } catch (cause: ContentTransformationException) {
+                log.error(cause.message)
+                call.respond(HttpStatusCode.BadRequest, cause.message ?: "Bad Arguments")
+            }
+
         }
 
         delete("/libraries") {
-            call.respondText("We hate to see you go!")
+            try {
+                val id = call.parameters["id"]!!.toLong()
+                log.info("Deleting item with id=$id")
+                libraryService.delete(id)
+                call.respondText(":(", status = HttpStatusCode.OK)
+            } catch (cause: DbElementNotFoundException) {
+                log.error(cause.message, cause)
+                call.respond(HttpStatusCode.BadRequest, cause.message ?: "Bad Arguments")
+            } catch (cause: NumberFormatException) {
+                log.error(cause.message, cause)
+                call.respond(HttpStatusCode.BadRequest, cause.message ?: "Invalid ID format")
+            }
         }
     }