feat(coderd): use new data model for task delete (#20334)

Updates coder/internal#976

coderd/httpmw/taskparam.go

@@ -0,0 +1,57 @@
+package httpmw
+
+import (
+	"context"
+	"net/http"
+
+	"cdr.dev/slog"
+
+	"github.com/coder/coder/v2/coderd/database"
+	"github.com/coder/coder/v2/coderd/httpapi"
+	"github.com/coder/coder/v2/coderd/httpmw/loggermw"
+	"github.com/coder/coder/v2/codersdk"
+)
+
+type taskParamContextKey struct{}
+
+// TaskParam returns the task from the ExtractTaskParam handler.
+func TaskParam(r *http.Request) database.Task {
+	task, ok := r.Context().Value(taskParamContextKey{}).(database.Task)
+	if !ok {
+		panic("developer error: task param middleware not provided")
+	}
+	return task
+}
+
+// ExtractTaskParam grabs a task from the "task" URL parameter by UUID.
+func ExtractTaskParam(db database.Store) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+			ctx := r.Context()
+			taskID, parsed := ParseUUIDParam(rw, r, "task")
+			if !parsed {
+				return
+			}
+			task, err := db.GetTaskByID(ctx, taskID)
+			if err != nil {
+				if httpapi.Is404Error(err) {
+					httpapi.ResourceNotFound(rw)
+					return
+				}
+				httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
+					Message: "Internal error fetching task.",
+					Detail:  err.Error(),
+				})
+				return
+			}
+
+			ctx = context.WithValue(ctx, taskParamContextKey{}, task)
+
+			if rlogger := loggermw.RequestLoggerFromContext(ctx); rlogger != nil {
+				rlogger.WithFields(slog.F("task_id", task.ID), slog.F("task_name", task.Name))
+			}
+
+			next.ServeHTTP(rw, r.WithContext(ctx))
+		})
+	}
+}