From b65afe682498d41d7eee70b3840716197f3c1b20 Mon Sep 17 00:00:00 2001
From: Andrei Alexeev <andrei.alexeev@alumni.fh-aachen.de>
Date: Thu, 6 Apr 2023 20:07:43 +0200
Subject: [PATCH] feature/time-measurement-decorator

---
 decorators.ts | 16 ++++++++++++++++
 graph.ts      | 12 +++++++++---
 main.ts       |  3 +++
 3 files changed, 28 insertions(+), 3 deletions(-)
 create mode 100644 decorators.ts

diff --git a/decorators.ts b/decorators.ts
new file mode 100644
index 0000000..19a3490
--- /dev/null
+++ b/decorators.ts
@@ -0,0 +1,16 @@
+import { verbose } from "./main.ts";
+
+export function measureTime() {
+  return (target: any, propertyKey: string, descriptor: PropertyDescriptor) => {
+    const original: (...args: Array<unknown>) => unknown = descriptor.value;
+
+    const timeLabel: string = `${target.constructor.name}.${propertyKey}`;
+    descriptor.value = function (...args: Array<unknown>) {
+      verbose && console.time(timeLabel);
+      const value: unknown = original.apply(this, args);
+      verbose && console.timeEnd(timeLabel);
+
+      return value;
+    };
+  };
+}
diff --git a/graph.ts b/graph.ts
index dfe3954..6c01315 100644
--- a/graph.ts
+++ b/graph.ts
@@ -1,5 +1,8 @@
 import { format } from "duration";
 import { colors } from "cliffy";
+import { measureTime } from "./decorators.ts";
+
+
 export class Graph {
   size: number;
   nodes: number[][];
@@ -32,18 +35,16 @@ export class Graph {
     this.verbose && this.logTime("Graph built in", start, end);
   }
 
+  
   get subGraphs() {
     const visited = new Uint8Array(this.size);
     const subgraphs: number[][] = [];
-    const start = performance.now();
     for (let i = 0; i < this.size; i++) {
       if (!visited[i]) {
         visited[i] = 1;
         subgraphs.push(this.dfs(i, visited));
       }
     }
-    const end = performance.now();
-    this.verbose && this.logTime("Subgraphs created in", start, end);
     return subgraphs;
   }
 
@@ -70,4 +71,9 @@ export class Graph {
       )}`
     );
   }
+
+  @measureTime()
+  printTimeAfterFunction(){
+    return this.subGraphs;
+  }
 }
diff --git a/main.ts b/main.ts
index 8437d0f..c070711 100644
--- a/main.ts
+++ b/main.ts
@@ -22,6 +22,7 @@ while (true) {
       Select.separator("---------"),
       { name: "Size of subgraphs", value: "subgraphsSize" },
       { name: "List of subgraphs", value: "subgraphsNodes" },
+      { name: "Measure Time with decorator", value: "measureTime"}
     ],
   });
   switch (command) {
@@ -43,5 +44,7 @@ while (true) {
     case "subgraphsNodes":
       console.log(graph.subGraphs);
       break;
+    case "measureTime":
+      graph.printTimeAfterFunction();
   }
 }