common: rabbit refactor

Generalize interface to allow processing of any events, not just
Gitea events.

common/rabbitmq_gitea.go

@@ -0,0 +1,128 @@
+package common
+
+/*
+ * This file is part of Autogits.
+ *
+ * Copyright © 2024 SUSE LLC
+ *
+ * Autogits is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * Autogits is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * Foobar. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import (
+	"fmt"
+	"runtime/debug"
+	"slices"
+	"strings"
+)
+
+const RequestType_CreateBrachTag = "create"
+const RequestType_DeleteBranchTag = "delete"
+const RequestType_Fork = "fork"
+const RequestType_Issue = "issues"
+const RequestType_IssueAssign = "issue_assign"
+const RequestType_IssueComment = "issue_comment"
+const RequestType_IssueLabel = "issue_label"
+const RequestType_IssueMilestone = "issue_milestone"
+const RequestType_Push = "push"
+const RequestType_Repository = "repository"
+const RequestType_Release = "release"
+const RequestType_PR = "pull_request"
+const RequestType_PRAssign = "pull_request_assign"
+const RequestType_PRLabel = "pull_request_label"
+const RequestType_PRComment = "pull_request_comment"
+const RequestType_PRMilestone = "pull_request_milestone"
+const RequestType_PRSync = "pull_request_sync"
+const RequestType_PRReviewAccepted = "pull_request_review_approved"
+const RequestType_PRReviewRejected = "pull_request_review_rejected"
+const RequestType_PRReviewRequest = "pull_request_review_request"
+const RequestType_PRReviewComment = "pull_request_review_comment"
+const RequestType_Wiki = "wiki"
+
+type RequestProcessor interface {
+	ProcessFunc(*Request) error
+}
+
+type RabbitMQGiteaEventsProcessor struct {
+	Handlers map[string]RequestProcessor
+	Orgs     []string
+
+	c *RabbitConnection
+}
+
+func (gitea *RabbitMQGiteaEventsProcessor) Connection() *RabbitConnection {
+	if gitea.c == nil {
+		gitea.c = &RabbitConnection{}
+	}
+	return gitea.c
+}
+
+func (gitea *RabbitMQGiteaEventsProcessor) GenerateTopics() []string {
+	topics := make([]string, 0, len(gitea.Handlers)*len(gitea.Orgs))
+	scope := "suse"
+	if gitea.c.RabbitURL.Hostname() == "rabbit.opensuse.org" {
+		scope = "opensuse"
+	}
+
+	for _, org := range gitea.Orgs {
+		for requestType, _ := range gitea.Handlers {
+			topics = append(topics, fmt.Sprintf("%s.src.%s.%s.#", scope, org, requestType))
+		}
+	}
+
+	slices.Sort(topics)
+	return slices.Compact(topics)
+}
+
+func (gitea *RabbitMQGiteaEventsProcessor) ProcessRabbitMessage(msg RabbitMessage) error {
+	route := strings.Split(msg.RoutingKey, ".")
+	if len(route) > 3 {
+		reqType := route[3]
+		org := route[2]
+
+		if !slices.Contains(gitea.Orgs, org) {
+			LogInfo("Got event for unhandeled org:", org)
+			return nil
+		}
+
+		LogDebug("org:", org, "type:", reqType)
+		if handler, found := gitea.Handlers[reqType]; found {
+			req, err := ParseRequestJSON(reqType, msg.Body)
+			if err != nil {
+				LogError("Error parsing request JSON:", err)
+				return nil
+			} else {
+				LogDebug("processing req", req.Type)
+				//					h.Request = req
+				ProcessEvent(handler, req)
+			}
+		}
+	}
+
+	return fmt.Errorf("Invalid routing key: %s", route)
+}
+
+func ProcessEvent(f RequestProcessor, request *Request) {
+	defer func() {
+		if r := recover(); r != nil {
+			LogError("panic caught")
+			if err, ok := r.(error); !ok {
+				LogError(err)
+			}
+			LogError(string(debug.Stack()))
+		}
+	}()
+
+	if err := f.ProcessFunc(request); err != nil {
+		LogError(err)
+	}
+}