1 files changed, 85 insertions, 0 deletions
diff --git a/src/scripts/controllers/connection/cache.ts b/src/scripts/controllers/connection/cache.ts
new file mode 100644
index 00000000..15517519
--- /dev/null
+++ b/src/scripts/controllers/connection/cache.ts
@@ -0,0 +1,85 @@
+export enum CacheStatus {
+    MISS,
+    FETCHING,
+    HIT,
+    NOT_CACHABLE
+}
+
+
+interface ICachableObject {
+    status: CacheStatus;
+    object: any;
+    callbacks: any[];
+}
+
+
+export class CacheController {
+    private static CACHABLE_ROUTES = [
+        "/specifications/psus/{id}",
+        "/specifications/cooling-items/{id}",
+        "/specifications/cpus/{id}",
+        "/specifications/gpus/{id}",
+        "/specifications/memories/{id}",
+        "/specifications/storages/{id}",
+        "/specifications/failure-models/{id}",
+    ];
+
+    // Maps every route name to a map of IDs => objects
+    private routeCaches: { [keys: string]: { [keys: number]: ICachableObject } };
+
+
+    constructor() {
+        this.routeCaches = {};
+
+        CacheController.CACHABLE_ROUTES.forEach((routeName: string) => {
+            this.routeCaches[routeName] = {};
+        })
+    }
+
+    public checkCache(request: IRequest): CacheStatus {
+        if (request.method === "GET" && CacheController.CACHABLE_ROUTES.indexOf(request.path) !== -1) {
+            if (this.routeCaches[request.path][request.parameters.path["id"]] === undefined) {
+                this.routeCaches[request.path][request.parameters.path["id"]] = {
+                    status: CacheStatus.MISS,
+                    object: null,
+                    callbacks: []
+                };
+                return CacheStatus.MISS;
+            } else {
+                return this.routeCaches[request.path][request.parameters.path["id"]].status;
+            }
+        } else {
+            return CacheStatus.NOT_CACHABLE;
+        }
+    }
+
+    public fetchFromCache(request: IRequest): any {
+        return this.routeCaches[request.path][request.parameters.path["id"]].object;
+    }
+
+    public setToFetching(request: IRequest): void {
+        this.routeCaches[request.path][request.parameters.path["id"]].status = CacheStatus.FETCHING;
+    }
+
+    public onFetch(request: IRequest, response: IResponse): any {
+        let pathWithoutVersion = request.path.replace(/\/v\d+/, "");
+        this.routeCaches[pathWithoutVersion][request.parameters.path["id"]].status = CacheStatus.HIT;
+        this.routeCaches[pathWithoutVersion][request.parameters.path["id"]].object = response.content;
+
+        this.routeCaches[pathWithoutVersion][request.parameters.path["id"]].callbacks.forEach((callback) => {
+            callback({
+                status: {
+                    code: 200
+                },
+                content: response.content,
+                id: request.id
+            });
+        });
+
+        this.routeCaches[pathWithoutVersion][request.parameters.path["id"]].callbacks = [];
+    }
+
+    public registerCallback(request: IRequest, callback): any {
+        this.routeCaches[request.path][request.parameters.path["id"]].callbacks.push(callback);
+    }
+}