Refactor rest api

internal/api/cluster.go

@@ -0,0 +1,70 @@
+// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package api
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/ClusterCockpit/cc-backend/internal/repository"
+	"github.com/ClusterCockpit/cc-backend/pkg/archive"
+	"github.com/ClusterCockpit/cc-backend/pkg/schema"
+)
+
+// GetClustersApiResponse model
+type GetClustersApiResponse struct {
+	Clusters []*schema.Cluster `json:"clusters"` // Array of clusters
+}
+
+// getClusters godoc
+// @summary     Lists all cluster configs
+// @tags Cluster query
+// @description Get a list of all cluster configs. Specific cluster can be requested using query parameter.
+// @produce     json
+// @param       cluster        query    string            false "Job Cluster"
+// @success     200            {object} api.GetClustersApiResponse  "Array of clusters"
+// @failure     400            {object} api.ErrorResponse       "Bad Request"
+// @failure     401            {object} api.ErrorResponse       "Unauthorized"
+// @failure     403            {object} api.ErrorResponse       "Forbidden"
+// @failure     500            {object} api.ErrorResponse       "Internal Server Error"
+// @security    ApiKeyAuth
+// @router      /api/clusters/ [get]
+func (api *RestApi) getClusters(rw http.ResponseWriter, r *http.Request) {
+	if user := repository.GetUserFromContext(r.Context()); user != nil &&
+		!user.HasRole(schema.RoleApi) {
+
+		handleError(fmt.Errorf("missing role: %v", schema.GetRoleString(schema.RoleApi)), http.StatusForbidden, rw)
+		return
+	}
+
+	rw.Header().Add("Content-Type", "application/json")
+	bw := bufio.NewWriter(rw)
+	defer bw.Flush()
+
+	var clusters []*schema.Cluster
+
+	if r.URL.Query().Has("cluster") {
+		name := r.URL.Query().Get("cluster")
+		cluster := archive.GetCluster(name)
+		if cluster == nil {
+			handleError(fmt.Errorf("unknown cluster: %s", name), http.StatusBadRequest, rw)
+			return
+		}
+		clusters = append(clusters, cluster)
+	} else {
+		clusters = archive.Clusters
+	}
+
+	payload := GetClustersApiResponse{
+		Clusters: clusters,
+	}
+
+	if err := json.NewEncoder(bw).Encode(payload); err != nil {
+		handleError(err, http.StatusInternalServerError, rw)
+		return
+	}
+}