Publish ITWorx Pulse source

internal/arrayapi/handler.go

@@ -0,0 +1,52 @@
+package arrayapi
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"time"
+
+	"github.com/itworx/pulse/internal/array"
+	"github.com/itworx/pulse/internal/auth"
+	"github.com/itworx/pulse/internal/problem"
+)
+
+type Handler struct{ Provider array.Provider }
+
+func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet || r.URL.Path != "/api/v1/array" {
+		http.NotFound(w, r)
+		return
+	}
+	if _, ok := auth.PrincipalFromContext(r.Context()); !ok {
+		problem.Write(w, r, http.StatusUnauthorized, "UNAUTHORIZED", "Authentication required", "Authentication is required to read array status.", nil)
+		return
+	}
+	if err := r.Context().Err(); err != nil {
+		return
+	}
+	var snapshot array.Snapshot
+	var err error
+	if h.Provider == nil {
+		snapshot = array.UnknownSnapshot(time.Now().UTC(), "array", "unraid", "source_unavailable")
+	} else {
+		snapshot, err = h.Provider.Snapshot(r.Context())
+	}
+	if err != nil {
+		if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) || errors.Is(r.Context().Err(), context.Canceled) {
+			return
+		}
+		problem.Write(w, r, http.StatusServiceUnavailable, "ARRAY_UNAVAILABLE", "Array status unavailable", "De arraystatus kon niet worden gelezen.", nil)
+		return
+	}
+	if snapshot.Members == nil {
+		snapshot.Members = []array.Member{}
+	}
+	if snapshot.History == nil {
+		snapshot.History = []array.Check{}
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.Header().Set("Cache-Control", "private, max-age=5")
+	_ = json.NewEncoder(w).Encode(snapshot)
+}