Added a new bee for JIRA integration (#366)

bees/jirabee/events.go

@@ -0,0 +1,146 @@
+/*
+ *    Copyright (C) 2021 Anthony Corrado
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Affero General Public License as published
+ *    by the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program 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 Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    Authors:
+ *      Anthony Corrado <anthony@synetz.fr>
+ */
+
+// Package jirabee is a Bee that can interface with Jira
+package jirabee
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/andygrunwald/go-jira"
+	"github.com/muesli/beehive/bees"
+)
+
+// JiraEvent represents a Jira Event
+type JiraEvent struct {
+	WebhookEvent     string                 `json:"webhookEvent"`
+	Issue            *jira.Issue            `json:"issue"`
+	ChangelogHistory *jira.ChangelogHistory `json:"changelog"`
+}
+
+func (mod *JiraBee) handleJiraEvent(data []byte) (*JiraEvent, error) {
+	jiraEvent := &JiraEvent{}
+	err := json.Unmarshal(data, &jiraEvent)
+	if err != nil {
+		return nil, fmt.Errorf("Error during JiraEvent Unmarshal: %v", err)
+	}
+
+	switch jiraEvent.WebhookEvent {
+
+	case "jira:issue_created":
+		err = mod.handleIssueCreatedEvent(jiraEvent)
+		if err != nil {
+			return nil, err
+		}
+	case "jira:issue_updated":
+		err = mod.handleIssueUpdatedEvent(jiraEvent)
+		if err != nil {
+			return nil, err
+		}
+	default:
+		return jiraEvent, fmt.Errorf("Unhandled event: %s", jiraEvent.WebhookEvent)
+	}
+
+	return jiraEvent, nil
+}
+
+func (mod *JiraBee) handleIssueCreatedEvent(data *JiraEvent) error {
+
+	if data.Issue == nil {
+		return fmt.Errorf("Error occured during handleIssueCreatedEvent, Issue field was empty")
+	}
+
+	key := data.Issue.Key
+	summary := data.Issue.Fields.Summary
+	description := data.Issue.Fields.Description
+
+	ev := bees.Event{
+		Bee:  mod.Name(),
+		Name: "issue_created",
+		Options: []bees.Placeholder{
+			{
+				Name:  "key",
+				Type:  "string",
+				Value: key,
+			},
+			{
+				Name:  "title",
+				Type:  "string",
+				Value: summary,
+			},
+			{
+				Name:  "description",
+				Type:  "string",
+				Value: description,
+			},
+		},
+	}
+
+	mod.eventChan <- ev
+	return nil
+}
+
+func (mod *JiraBee) handleIssueUpdatedEvent(jiraEvent *JiraEvent) error {
+
+	if jiraEvent.Issue == nil {
+		return fmt.Errorf("Issue field is empty, impossible to identify the issue key")
+	}
+
+	if jiraEvent.ChangelogHistory == nil {
+		return fmt.Errorf("Changelog field is empty, impossible to identify the change type")
+	}
+
+	for _, item := range jiraEvent.ChangelogHistory.Items {
+		if item.Field == "status" {
+			mod.handleIssueStatusUpdatedEvent(jiraEvent.Issue.Key, item.FromString, item.ToString)
+		}
+	}
+
+	return nil
+}
+
+func (mod *JiraBee) handleIssueStatusUpdatedEvent(key string, fromStatus string, toStatus string) error {
+
+	ev := bees.Event{
+		Bee:  mod.Name(),
+		Name: "issue_status_updated",
+		Options: []bees.Placeholder{
+			{
+				Name:  "key",
+				Type:  "string",
+				Value: key,
+			},
+			{
+				Name:  "fromStatus",
+				Type:  "string",
+				Value: fromStatus,
+			},
+			{
+				Name:  "toStatus",
+				Type:  "string",
+				Value: toStatus,
+			},
+		},
+	}
+
+	mod.eventChan <- ev
+	return nil
+}