From 658bfc2704eb7630911b5a3c994258757dd79cec Mon Sep 17 00:00:00 2001
From: Andrey Nering <andrey.nering@gmail.com>
Date: Wed, 17 Feb 2016 20:21:31 -0200
Subject: [PATCH] Implement issue and pull request templates.

Similar to GitHub:
https://github.com/blog/2111-issue-and-pull-request-templates

Priority:
- root
- .gogs
- .github
---
 routers/repo/issue.go                 | 48 +++++++++++++++++++++++++++
 routers/repo/pull.go                  | 11 ++++++
 templates/repo/issue/comment_tab.tmpl |  2 +-
 3 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/routers/repo/issue.go b/routers/repo/issue.go
index 635dee930..3120a8ba2 100644
--- a/routers/repo/issue.go
+++ b/routers/repo/issue.go
@@ -7,6 +7,8 @@ package repo
 import (
 	"errors"
 	"fmt"
+	"io"
+	"io/ioutil"
 	"net/http"
 	"net/url"
 	"strings"
@@ -34,11 +36,19 @@ const (
 	MILESTONE      base.TplName = "repo/issue/milestones"
 	MILESTONE_NEW  base.TplName = "repo/issue/milestone_new"
 	MILESTONE_EDIT base.TplName = "repo/issue/milestone_edit"
+
+	ISSUE_TEMPLATE_KEY = "IssueTemplate"
 )
 
 var (
 	ErrFileTypeForbidden = errors.New("File type is not allowed")
 	ErrTooManyFiles      = errors.New("Maximum number of files to upload exceeded")
+
+	IssueTemplateCandidates = []string{
+		"ISSUE_TEMPLATE.md",
+		".gogs/ISSUE_TEMPLATE.md",
+		".github/ISSUE_TEMPLATE.md",
+	}
 )
 
 func MustEnableIssues(ctx *middleware.Context) {
@@ -281,9 +291,47 @@ func RetrieveRepoMetas(ctx *middleware.Context, repo *models.Repository) []*mode
 	return labels
 }
 
+func getFileContentFromDefaultBranch(ctx *middleware.Context, filename string) (string, bool) {
+	var r io.Reader
+	var bytes []byte
+
+	if ctx.Repo.Commit == nil {
+		var err error
+		ctx.Repo.Commit, err = ctx.Repo.GitRepo.GetBranchCommit(ctx.Repo.Repository.DefaultBranch)
+		if err != nil {
+			return "", false
+		}
+	}
+
+	entry, err := ctx.Repo.Commit.GetTreeEntryByPath(filename)
+	if err != nil {
+		return "", false
+	}
+	r, err = entry.Blob().Data()
+	if err != nil {
+		return "", false
+	}
+	bytes, err = ioutil.ReadAll(r)
+	if err != nil {
+		return "", false
+	}
+	return string(bytes), true
+}
+
+func setTemplateIfExists(ctx *middleware.Context, ctxDataKey string, possibleFiles []string) {
+	for _, filename := range possibleFiles {
+		content, found := getFileContentFromDefaultBranch(ctx, filename)
+		if found {
+			ctx.Data[ctxDataKey] = content
+			return
+		}
+	}
+}
+
 func NewIssue(ctx *middleware.Context) {
 	ctx.Data["Title"] = ctx.Tr("repo.issues.new")
 	ctx.Data["PageIsIssueList"] = true
+	setTemplateIfExists(ctx, ISSUE_TEMPLATE_KEY, IssueTemplateCandidates)
 	renderAttachmentSettings(ctx)
 
 	RetrieveRepoMetas(ctx, ctx.Repo.Repository)
diff --git a/routers/repo/pull.go b/routers/repo/pull.go
index 3240461c8..cf8c4829b 100644
--- a/routers/repo/pull.go
+++ b/routers/repo/pull.go
@@ -26,6 +26,16 @@ const (
 	COMPARE_PULL base.TplName = "repo/pulls/compare"
 	PULL_COMMITS base.TplName = "repo/pulls/commits"
 	PULL_FILES   base.TplName = "repo/pulls/files"
+
+	PULL_REQUEST_TEMPLATE_KEY = "PullRequestTemplate"
+)
+
+var (
+	PullRequestTemplateCandidates = []string{
+		"PULL_REQUEST.md",
+		".gogs/PULL_REQUEST.md",
+		".github/PULL_REQUEST.md",
+	}
 )
 
 func getForkRepository(ctx *middleware.Context) *models.Repository {
@@ -540,6 +550,7 @@ func CompareAndPullRequest(ctx *middleware.Context) {
 	ctx.Data["PageIsComparePull"] = true
 	ctx.Data["IsDiffCompare"] = true
 	ctx.Data["RequireHighlightJS"] = true
+	setTemplateIfExists(ctx, PULL_REQUEST_TEMPLATE_KEY, PullRequestTemplateCandidates)
 	renderAttachmentSettings(ctx)
 
 	headUser, headRepo, headGitRepo, prInfo, baseBranch, headBranch := ParseCompareInfo(ctx)
diff --git a/templates/repo/issue/comment_tab.tmpl b/templates/repo/issue/comment_tab.tmpl
index 8f6c8ca77..851c3b1fa 100644
--- a/templates/repo/issue/comment_tab.tmpl
+++ b/templates/repo/issue/comment_tab.tmpl
@@ -4,7 +4,7 @@
 		<a class="item" data-tab="preview" data-url="{{AppSubUrl}}/api/v1/markdown" data-context="{{.RepoLink}}">{{.i18n.Tr "repo.release.preview"}}</a>
 	</div>
 	<div class="ui bottom attached active tab segment" data-tab="write">
-		<textarea id="content" name="content" tabindex="4"></textarea>
+		<textarea id="content" name="content" tabindex="4">{{if .IssueTemplate}}{{.IssueTemplate}}{{end}}{{if .PullRequestTemplate}}{{.PullRequestTemplate}}{{end}}</textarea>
 	</div>
 	<div class="ui bottom attached tab segment markdown" data-tab="preview">
 		{{.i18n.Tr "repo.release.loading"}}