feat:#39 added module and prof fetch

backend/service/fetch/v3/fetchRooms.go

@@ -0,0 +1,93 @@
+package v3
+
+import (
+	"encoding/json"
+	"log/slog"
+	"net/http"
+)
+
+/*
+
+{
+  "hydra:member": [
+    {
+      "@context": "string",
+      "@id": "string",
+      "@type": "string",
+      "id": "string",
+      "kuerzel": "string",
+      "beschreibung": "string",
+      "hinweisOne": "string",
+      "hinweisTwo": "string",
+      "plaetze": 0
+    }
+  ],
+  "hydra:totalItems": 0,
+  "hydra:view": {
+    "@id": "string",
+    "type": "string",
+    "hydra:first": "string",
+    "hydra:last": "string",
+    "hydra:previous": "string",
+    "hydra:next": "string"
+  },
+  "hydra:search": {
+    "@type": "string",
+    "hydra:template": "string",
+    "hydra:variableRepresentation": "string",
+    "hydra:mapping": [
+      {
+        "@type": "string",
+        "variable": "string",
+        "property": "string",
+        "required": true
+      }
+    ]
+  }
+}
+
+*/
+
+// room Model for fetching json data
+
+type Rooms struct {
+	TotalItems int    `json:"hydra:totalItems"`
+	Rooms      []Room `json:"hydra:member"`
+}
+
+type Room struct {
+	ID          string `json:"id"`
+	ShortCut    string `json:"kuerzel"`
+	Description string `json:"beschreibung"`
+	Seats       int    `json:"plaetze"`
+	Note1       string `json:"hinweisOne"`
+	Note2       string `json:"hinweisTwo"`
+}
+
+func parseRooms(url string, client *http.Client) (Rooms, error) {
+
+	// the url is paginated, so we need to fetch all pages
+	// example url: https://luna.htwk-leipzig.de/api/raum?page=1&itemsPerPage=100
+	// the itemsPerPage is set to 100, so we need to fetch all pages until we get an empty response
+
+	var fetchedRooms Rooms
+	var itemsPerPage = 999
+
+	responses, err := paginatedFetch(url, itemsPerPage, client)
+
+	if err != nil {
+		slog.Error("Error while fetching paginated api", err)
+		return fetchedRooms, err
+	}
+
+	for _, response := range responses {
+		var rooms Rooms
+		err = json.Unmarshal([]byte(response), &rooms)
+		if err != nil {
+			slog.Error("Error while unmarshalling rooms", err)
+			return fetchedRooms, err
+		}
+		fetchedRooms.Rooms = append(fetchedRooms.Rooms, rooms.Rooms...)
+	}
+	return fetchedRooms, nil
+}