Implementation of discord webhook (#2402)

* implementation of discord webhook

* fix webhooks

* fix typo and unnecessary color values

* fix typo

* fix imports and revert changes to webhook_slack.go

models/webhook.go

@@ -13,15 +13,14 @@ import (
 	"strings"
 	"time"
 
-	"github.com/go-xorm/xorm"
-	gouuid "github.com/satori/go.uuid"
-
-	api "code.gitea.io/sdk/gitea"
-
 	"code.gitea.io/gitea/modules/httplib"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/sync"
+	api "code.gitea.io/sdk/gitea"
+
+	"github.com/go-xorm/xorm"
+	gouuid "github.com/satori/go.uuid"
 )
 
 // HookQueue is a global queue of web hooks
@@ -150,6 +149,15 @@ func (w *Webhook) GetSlackHook() *SlackMeta {
 	return s
 }
 
+// GetDiscordHook returns discord metadata
+func (w *Webhook) GetDiscordHook() *DiscordMeta {
+	s := &DiscordMeta{}
+	if err := json.Unmarshal([]byte(w.Meta), s); err != nil {
+		log.Error(4, "webhook.GetDiscordHook(%d): %v", w.ID, err)
+	}
+	return s
+}
+
 // History returns history of webhook by given conditions.
 func (w *Webhook) History(page int) ([]*HookTask, error) {
 	return HookTasks(w.ID, page)
@@ -314,12 +322,14 @@ const (
 	GOGS HookTaskType = iota + 1
 	SLACK
 	GITEA
+	DISCORD
 )
 
 var hookTaskTypes = map[string]HookTaskType{
-	"gitea": GITEA,
-	"gogs":  GOGS,
-	"slack": SLACK,
+	"gitea":   GITEA,
+	"gogs":    GOGS,
+	"slack":   SLACK,
+	"discord": DISCORD,
 }
 
 // ToHookTaskType returns HookTaskType by given name.
@@ -336,6 +346,8 @@ func (t HookTaskType) Name() string {
 		return "gogs"
 	case SLACK:
 		return "slack"
+	case DISCORD:
+		return "discord"
 	}
 	return ""
 }
@@ -515,6 +527,11 @@ func PrepareWebhooks(repo *Repository, event HookEventType, p api.Payloader) err
 			if err != nil {
 				return fmt.Errorf("GetSlackPayload: %v", err)
 			}
+		case DISCORD:
+			payloader, err = GetDiscordPayload(p, event, w.Meta)
+			if err != nil {
+				return fmt.Errorf("GetDiscordPayload: %v", err)
+			}
 		default:
 			p.SetSecret(w.Secret)
 			payloader = p

models/webhook_discord.go

@@ -0,0 +1,252 @@
+package models
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"code.gitea.io/git"
+	"code.gitea.io/gitea/modules/setting"
+	api "code.gitea.io/sdk/gitea"
+)
+
+type (
+	// DiscordEmbedFooter for Embed Footer Structure.
+	DiscordEmbedFooter struct {
+		Text string `json:"text"`
+	}
+
+	// DiscordEmbedAuthor for Embed Author Structure
+	DiscordEmbedAuthor struct {
+		Name    string `json:"name"`
+		URL     string `json:"url"`
+		IconURL string `json:"icon_url"`
+	}
+
+	// DiscordEmbedField for Embed Field Structure
+	DiscordEmbedField struct {
+		Name  string `json:"name"`
+		Value string `json:"value"`
+	}
+
+	// DiscordEmbed is for Embed Structure
+	DiscordEmbed struct {
+		Title       string              `json:"title"`
+		Description string              `json:"description"`
+		URL         string              `json:"url"`
+		Color       int                 `json:"color"`
+		Footer      DiscordEmbedFooter  `json:"footer"`
+		Author      DiscordEmbedAuthor  `json:"author"`
+		Fields      []DiscordEmbedField `json:"fields"`
+	}
+
+	// DiscordPayload represents
+	DiscordPayload struct {
+		Wait      bool           `json:"wait"`
+		Content   string         `json:"content"`
+		Username  string         `json:"username"`
+		AvatarURL string         `json:"avatar_url"`
+		TTS       bool           `json:"tts"`
+		Embeds    []DiscordEmbed `json:"embeds"`
+	}
+
+	// DiscordMeta contains the discord metadata
+	DiscordMeta struct {
+		Username string `json:"username"`
+		IconURL  string `json:"icon_url"`
+	}
+)
+
+func color(clr string) int {
+	if clr != "" {
+		clr = strings.TrimLeft(clr, "#")
+		if s, err := strconv.ParseInt(clr, 16, 32); err == nil {
+			return int(s)
+		}
+	}
+
+	return 0
+}
+
+var (
+	successColor = color("1ac600")
+	warnColor    = color("ffd930")
+	failedColor  = color("ff3232")
+)
+
+// SetSecret sets the discord secret
+func (p *DiscordPayload) SetSecret(_ string) {}
+
+// JSONPayload Marshals the DiscordPayload to json
+func (p *DiscordPayload) JSONPayload() ([]byte, error) {
+	data, err := json.MarshalIndent(p, "", "  ")
+	if err != nil {
+		return []byte{}, err
+	}
+	return data, nil
+}
+
+func getDiscordCreatePayload(p *api.CreatePayload, meta *DiscordMeta) (*DiscordPayload, error) {
+	// created tag/branch
+	refName := git.RefEndName(p.Ref)
+	title := fmt.Sprintf("[%s] %s %s created", p.Repo.FullName, p.RefType, refName)
+
+	return &DiscordPayload{
+		Username:  meta.Username,
+		AvatarURL: meta.IconURL,
+		Embeds: []DiscordEmbed{
+			{
+				Title: title,
+				URL:   p.Repo.HTMLURL + "/src/" + refName,
+				Color: successColor,
+				Author: DiscordEmbedAuthor{
+					Name:    p.Sender.UserName,
+					URL:     setting.AppURL + p.Sender.UserName,
+					IconURL: p.Sender.AvatarURL,
+				},
+			},
+		},
+	}, nil
+}
+
+func getDiscordPushPayload(p *api.PushPayload, meta *DiscordMeta) (*DiscordPayload, error) {
+	var (
+		branchName = git.RefEndName(p.Ref)
+		commitDesc string
+	)
+
+	var titleLink string
+	if len(p.Commits) == 1 {
+		commitDesc = "1 new commit"
+		titleLink = p.Commits[0].URL
+	} else {
+		commitDesc = fmt.Sprintf("%d new commits", len(p.Commits))
+		titleLink = p.CompareURL
+	}
+	if titleLink == "" {
+		titleLink = p.Repo.HTMLURL + "/src/" + branchName
+	}
+
+	title := fmt.Sprintf("[%s:%s] %s", p.Repo.FullName, branchName, commitDesc)
+
+	var text string
+	// for each commit, generate attachment text
+	for i, commit := range p.Commits {
+		text += fmt.Sprintf("[%s](%s) %s - %s", commit.ID[:7], commit.URL,
+			strings.TrimRight(commit.Message, "\r\n"), commit.Author.Name)
+		// add linebreak to each commit but the last
+		if i < len(p.Commits)-1 {
+			text += "\n"
+		}
+	}
+
+	fmt.Println(text)
+
+	return &DiscordPayload{
+		Username:  meta.Username,
+		AvatarURL: meta.IconURL,
+		Embeds: []DiscordEmbed{
+			{
+				Title:       title,
+				Description: text,
+				URL:         titleLink,
+				Color:       successColor,
+				Author: DiscordEmbedAuthor{
+					Name:    p.Sender.UserName,
+					URL:     setting.AppURL + p.Sender.UserName,
+					IconURL: p.Sender.AvatarURL,
+				},
+			},
+		},
+	}, nil
+}
+
+func getDiscordPullRequestPayload(p *api.PullRequestPayload, meta *DiscordMeta) (*DiscordPayload, error) {
+	var text, title string
+	var color int
+	switch p.Action {
+	case api.HookIssueOpened:
+		title = fmt.Sprintf("[%s] Pull request opened: #%d %s", p.Repository.FullName, p.Index, p.PullRequest.Title)
+		text = p.PullRequest.Body
+		color = warnColor
+	case api.HookIssueClosed:
+		if p.PullRequest.HasMerged {
+			title = fmt.Sprintf("[%s] Pull request merged: #%d %s", p.Repository.FullName, p.Index, p.PullRequest.Title)
+			color = successColor
+		} else {
+			title = fmt.Sprintf("[%s] Pull request closed: #%d %s", p.Repository.FullName, p.Index, p.PullRequest.Title)
+			color = failedColor
+		}
+		text = p.PullRequest.Body
+	case api.HookIssueReOpened:
+		title = fmt.Sprintf("[%s] Pull request re-opened: #%d %s", p.Repository.FullName, p.Index, p.PullRequest.Title)
+		text = p.PullRequest.Body
+		color = warnColor
+	case api.HookIssueEdited:
+		title = fmt.Sprintf("[%s] Pull request edited: #%d %s", p.Repository.FullName, p.Index, p.PullRequest.Title)
+		text = p.PullRequest.Body
+		color = warnColor
+	case api.HookIssueAssigned:
+		title = fmt.Sprintf("[%s] Pull request assigned to %s: #%d %s", p.Repository.FullName,
+			p.PullRequest.Assignee.UserName, p.Index, p.PullRequest.Title)
+		text = p.PullRequest.Body
+		color = successColor
+	case api.HookIssueUnassigned:
+		title = fmt.Sprintf("[%s] Pull request unassigned: #%d %s", p.Repository.FullName, p.Index, p.PullRequest.Title)
+		text = p.PullRequest.Body
+		color = warnColor
+	case api.HookIssueLabelUpdated:
+		title = fmt.Sprintf("[%s] Pull request labels updated: #%d %s", p.Repository.FullName, p.Index, p.PullRequest.Title)
+		text = p.PullRequest.Body
+		color = warnColor
+	case api.HookIssueLabelCleared:
+		title = fmt.Sprintf("[%s] Pull request labels cleared: #%d %s", p.Repository.FullName, p.Index, p.PullRequest.Title)
+		text = p.PullRequest.Body
+		color = warnColor
+	case api.HookIssueSynchronized:
+		title = fmt.Sprintf("[%s] Pull request synchronized: #%d %s", p.Repository.FullName, p.Index, p.PullRequest.Title)
+		text = p.PullRequest.Body
+		color = warnColor
+	}
+
+	return &DiscordPayload{
+		Username:  meta.Username,
+		AvatarURL: meta.IconURL,
+		Embeds: []DiscordEmbed{
+			{
+				Title:       title,
+				Description: text,
+				URL:         p.PullRequest.HTMLURL,
+				Color:       color,
+				Author: DiscordEmbedAuthor{
+					Name:    p.Sender.UserName,
+					URL:     setting.AppURL + p.Sender.UserName,
+					IconURL: p.Sender.AvatarURL,
+				},
+			},
+		},
+	}, nil
+}
+
+// GetDiscordPayload converts a discord webhook into a DiscordPayload
+func GetDiscordPayload(p api.Payloader, event HookEventType, meta string) (*DiscordPayload, error) {
+	s := new(DiscordPayload)
+
+	discord := &DiscordMeta{}
+	if err := json.Unmarshal([]byte(meta), &discord); err != nil {
+		return s, errors.New("GetDiscordPayload meta json:" + err.Error())
+	}
+
+	switch event {
+	case HookEventCreate:
+		return getDiscordCreatePayload(p.(*api.CreatePayload), discord)
+	case HookEventPush:
+		return getDiscordPushPayload(p.(*api.PushPayload), discord)
+	case HookEventPullRequest:
+		return getDiscordPullRequestPayload(p.(*api.PullRequestPayload), discord)
+	}
+
+	return s, nil
+}

modules/auth/repo_form.go

@@ -183,6 +183,19 @@ func (f *NewSlackHookForm) Validate(ctx *macaron.Context, errs binding.Errors) b
 	return validate(errs, ctx.Data, f, ctx.Locale)
 }
 
+// NewDiscordHookForm form for creating discord hook
+type NewDiscordHookForm struct {
+	PayloadURL string `binding:"Required;ValidUrl"`
+	Username   string
+	IconURL    string
+	WebhookForm
+}
+
+// Validate validates the fields
+func (f *NewDiscordHookForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
+	return validate(errs, ctx.Data, f, ctx.Locale)
+}
+
 // .___
 // |   | ______ ________ __   ____
 // |   |/  ___//  ___/  |  \_/ __ \

modules/setting/setting.go

@@ -1367,7 +1367,7 @@ func newWebhookService() {
 	Webhook.QueueLength = sec.Key("QUEUE_LENGTH").MustInt(1000)
 	Webhook.DeliverTimeout = sec.Key("DELIVER_TIMEOUT").MustInt(5)
 	Webhook.SkipTLSVerify = sec.Key("SKIP_TLS_VERIFY").MustBool()
-	Webhook.Types = []string{"gitea", "gogs", "slack"}
+	Webhook.Types = []string{"gitea", "gogs", "slack", "discord"}
 	Webhook.PagingNum = sec.Key("PAGING_NUM").MustInt(10)
 }
 

options/locale/locale_en-US.ini

@@ -879,6 +879,8 @@ settings.content_type = Content Type
 settings.secret = Secret
 settings.slack_username = Username
 settings.slack_icon_url = Icon URL
+settings.discord_username = Username
+settings.discord_icon_url = Icon URL
 settings.slack_color = Color
 settings.event_desc = When should this webhook be triggered?
 settings.event_push_only = Just the <code>push</code> event.
@@ -902,6 +904,7 @@ settings.add_slack_hook_desc = Add Slack integration to your re
 settings.slack_token = Token
 settings.slack_domain = Domain
 settings.slack_channel = Channel
+settings.add_discord_hook_desc = Add <a href="%s">Discord</a> integration to your repository.
 settings.deploy_keys = Deploy Keys
 settings.add_deploy_key = Add Deploy Key
 settings.deploy_key_desc = Deploy keys have read-only access. They are not the same as personal account SSH keys.

routers/repo/webhook.go

@@ -11,16 +11,15 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/Unknwon/com"
-
 	"code.gitea.io/git"
-	api "code.gitea.io/sdk/gitea"
-
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/auth"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/setting"
+	api "code.gitea.io/sdk/gitea"
+
+	"github.com/Unknwon/com"
 )
 
 const (
@@ -96,10 +95,18 @@ func WebhooksNew(ctx *context.Context) {
 		return
 	}
 
-	ctx.Data["HookType"] = checkHookType(ctx)
+	hookType := checkHookType(ctx)
+	ctx.Data["HookType"] = hookType
 	if ctx.Written() {
 		return
 	}
+	if hookType == "discord" {
+		ctx.Data["DiscordHook"] = map[string]interface{}{
+			"Username": "Gitea",
+			"IconURL":  setting.AppURL + "img/favicon.png",
+			"Color":    16724530,
+		}
+	}
 	ctx.Data["BaseLink"] = orCtx.Link
 
 	ctx.HTML(200, orCtx.NewTemplate)
@@ -213,6 +220,55 @@ func GogsHooksNewPost(ctx *context.Context, form auth.NewWebhookForm) {
 	ctx.Redirect(orCtx.Link + "/settings/hooks")
 }
 
+// DiscordHooksNewPost response for creating discord hook
+func DiscordHooksNewPost(ctx *context.Context, form auth.NewDiscordHookForm) {
+	ctx.Data["Title"] = ctx.Tr("repo.settings")
+	ctx.Data["PageIsSettingsHooks"] = true
+	ctx.Data["PageIsSettingsHooksNew"] = true
+	ctx.Data["Webhook"] = models.Webhook{HookEvent: &models.HookEvent{}}
+
+	orCtx, err := getOrgRepoCtx(ctx)
+	if err != nil {
+		ctx.Handle(500, "getOrgRepoCtx", err)
+		return
+	}
+
+	if ctx.HasError() {
+		ctx.HTML(200, orCtx.NewTemplate)
+		return
+	}
+
+	meta, err := json.Marshal(&models.DiscordMeta{
+		Username: form.Username,
+		IconURL:  form.IconURL,
+	})
+	if err != nil {
+		ctx.Handle(500, "Marshal", err)
+		return
+	}
+
+	w := &models.Webhook{
+		RepoID:       orCtx.RepoID,
+		URL:          form.PayloadURL,
+		ContentType:  models.ContentTypeJSON,
+		HookEvent:    ParseHookEvent(form.WebhookForm),
+		IsActive:     form.Active,
+		HookTaskType: models.DISCORD,
+		Meta:         string(meta),
+		OrgID:        orCtx.OrgID,
+	}
+	if err := w.UpdateEvent(); err != nil {
+		ctx.Handle(500, "UpdateEvent", err)
+		return
+	} else if err := models.CreateWebhook(w); err != nil {
+		ctx.Handle(500, "CreateWebhook", err)
+		return
+	}
+
+	ctx.Flash.Success(ctx.Tr("repo.settings.add_hook_success"))
+	ctx.Redirect(orCtx.Link + "/settings/hooks")
+}
+
 // SlackHooksNewPost response for creating slack hook
 func SlackHooksNewPost(ctx *context.Context, form auth.NewSlackHookForm) {
 	ctx.Data["Title"] = ctx.Tr("repo.settings")
@@ -295,6 +351,9 @@ func checkWebhook(ctx *context.Context) (*orgRepoCtx, *models.Webhook) {
 		ctx.Data["HookType"] = "slack"
 	case models.GOGS:
 		ctx.Data["HookType"] = "gogs"
+	case models.DISCORD:
+		ctx.Data["DiscordHook"] = w.GetDiscordHook()
+		ctx.Data["HookType"] = "discord"
 	default:
 		ctx.Data["HookType"] = "gitea"
 	}
@@ -443,6 +502,48 @@ func SlackHooksEditPost(ctx *context.Context, form auth.NewSlackHookForm) {
 	ctx.Redirect(fmt.Sprintf("%s/settings/hooks/%d", orCtx.Link, w.ID))
 }
 
+// DiscordHooksEditPost response for editing discord hook
+func DiscordHooksEditPost(ctx *context.Context, form auth.NewDiscordHookForm) {
+	ctx.Data["Title"] = ctx.Tr("repo.settings")
+	ctx.Data["PageIsSettingsHooks"] = true
+	ctx.Data["PageIsSettingsHooksEdit"] = true
+
+	orCtx, w := checkWebhook(ctx)
+	if ctx.Written() {
+		return
+	}
+	ctx.Data["Webhook"] = w
+
+	if ctx.HasError() {
+		ctx.HTML(200, orCtx.NewTemplate)
+		return
+	}
+
+	meta, err := json.Marshal(&models.DiscordMeta{
+		Username: form.Username,
+		IconURL:  form.IconURL,
+	})
+	if err != nil {
+		ctx.Handle(500, "Marshal", err)
+		return
+	}
+
+	w.URL = form.PayloadURL
+	w.Meta = string(meta)
+	w.HookEvent = ParseHookEvent(form.WebhookForm)
+	w.IsActive = form.Active
+	if err := w.UpdateEvent(); err != nil {
+		ctx.Handle(500, "UpdateEvent", err)
+		return
+	} else if err := models.UpdateWebhook(w); err != nil {
+		ctx.Handle(500, "UpdateWebhook", err)
+		return
+	}
+
+	ctx.Flash.Success(ctx.Tr("repo.settings.update_hook_success"))
+	ctx.Redirect(fmt.Sprintf("%s/settings/hooks/%d", orCtx.Link, w.ID))
+}
+
 // TestWebhook test if web hook is work fine
 func TestWebhook(ctx *context.Context) {
 	// Grab latest commit or fake one if it's empty repository.

routers/routes/routes.go

@@ -442,11 +442,13 @@ func RegisterRoutes(m *macaron.Macaron) {
 				m.Post("/gitea/new", bindIgnErr(auth.NewWebhookForm{}), repo.WebHooksNewPost)
 				m.Post("/gogs/new", bindIgnErr(auth.NewGogshookForm{}), repo.GogsHooksNewPost)
 				m.Post("/slack/new", bindIgnErr(auth.NewSlackHookForm{}), repo.SlackHooksNewPost)
+				m.Post("/discord/new", bindIgnErr(auth.NewDiscordHookForm{}), repo.DiscordHooksNewPost)
 				m.Get("/:id", repo.WebHooksEdit)
 				m.Post("/:id/test", repo.TestWebhook)
 				m.Post("/gitea/:id", bindIgnErr(auth.NewWebhookForm{}), repo.WebHooksEditPost)
 				m.Post("/gogs/:id", bindIgnErr(auth.NewGogshookForm{}), repo.GogsHooksNewPost)
 				m.Post("/slack/:id", bindIgnErr(auth.NewSlackHookForm{}), repo.SlackHooksEditPost)
+				m.Post("/discord/:id", bindIgnErr(auth.NewDiscordHookForm{}), repo.DiscordHooksEditPost)
 
 				m.Group("/git", func() {
 					m.Get("", repo.GitHooks)

templates/repo/settings/hook_discord.tmpl

@@ -0,0 +1,19 @@
+{{if eq .HookType "discord"}}
+	<p>{{.i18n.Tr "repo.settings.add_discord_hook_desc" "https://discordapp.com" | Str2html}}</p>
+	<form class="ui form" action="{{.BaseLink}}/settings/hooks/discord/{{if .PageIsSettingsHooksNew}}new{{else}}{{.Webhook.ID}}{{end}}" method="post">
+		{{.CsrfTokenHtml}}
+		<div class="required field {{if .Err_PayloadURL}}error{{end}}">
+			<label for="payload_url">{{.i18n.Tr "repo.settings.payload_url"}}</label>
+			<input id="payload_url" name="payload_url" type="url" value="{{.Webhook.URL}}" autofocus required>
+		</div>
+		<div class="field">
+			<label for="username">{{.i18n.Tr "repo.settings.discord_username"}}</label>
+			<input id="username" name="username" value="{{.DiscordHook.Username}}" placeholder="e.g. Gitea">
+		</div>
+		<div class="field">
+			<label for="icon_url">{{.i18n.Tr "repo.settings.discord_icon_url"}}</label>
+			<input id="icon_url" name="icon_url" value="{{.DiscordHook.IconURL}}" placeholder="e.g. https://example.com/img/favicon.png">
+		</div>
+		{{template "repo/settings/hook_settings" .}}
+	</form>
+{{end}}

templates/repo/settings/hook_list.tmpl

@@ -14,6 +14,9 @@
 				<a class="item" href="{{.BaseLink}}/settings/hooks/slack/new">
 					<img class="img-10" src="{{AppSubUrl}}/img/slack.png">Slack
 				</a>
+				<a class="item" href="{{.BaseLink}}/settings/hooks/discord/new">
+					<img class="img-10" src="{{AppSubUrl}}/img/discord.png">Discord
+				</a>
 			</div>
 		</div>
 	</div>

templates/repo/settings/hook_new.tmpl

@@ -13,6 +13,8 @@
 					<img class="img-13" src="{{AppSubUrl}}/img/gogs.ico">
 				{{else if eq .HookType "slack"}}
 					<img class="img-13" src="{{AppSubUrl}}/img/slack.png">
+				{{else if eq .HookType "discord"}}
+					<img class="img-13" src="{{AppSubUrl}}/img/discord.png">
 				{{end}}
 			</div>
 		</h4>
@@ -20,6 +22,7 @@
 			{{template "repo/settings/hook_gitea" .}}
 			{{template "repo/settings/hook_gogs" .}}
 			{{template "repo/settings/hook_slack" .}}
+			{{template "repo/settings/hook_discord" .}}
 		</div>
 
 		{{template "repo/settings/hook_history" .}}