From 1c9c71d84ae520d9056c5309193d2122026844b3 Mon Sep 17 00:00:00 2001
From: qwerty287 <qwerty287@noreply.gitea.io>
Date: Mon, 17 Oct 2022 02:33:29 +0800
Subject: [PATCH] Add `ListPullRequestFiles` (#607)

Was added in https://github.com/go-gitea/gitea/commit/1dfa28ffa557720d164a351783be64c9a47a0adb.

Co-authored-by: qwerty287 <ndev@web.de>
Reviewed-on: https://gitea.com/gitea/go-sdk/pulls/607
Reviewed-by: 6543 <6543@obermui.de>
Reviewed-by: Gusted <williamzijl7@hotmail.com>
Co-authored-by: qwerty287 <qwerty287@noreply.gitea.io>
Co-committed-by: qwerty287 <qwerty287@noreply.gitea.io>
---
 gitea/pull.go      | 31 +++++++++++++++++++++++++++++++
 gitea/pull_test.go | 10 ++++++++++
 2 files changed, 41 insertions(+)

diff --git a/gitea/pull.go b/gitea/pull.go
index 0a900f7..22b03cf 100644
--- a/gitea/pull.go
+++ b/gitea/pull.go
@@ -60,6 +60,19 @@ type PullRequest struct {
 	Closed   *time.Time `json:"closed_at"`
 }
 
+// ChangedFile is a changed file in a diff
+type ChangedFile struct {
+	Filename         string `json:"filename"`
+	PreviousFilename string `json:"previous_filename"`
+	Status           string `json:"status"`
+	Additions        int    `json:"additions"`
+	Deletions        int    `json:"deletions"`
+	Changes          int    `json:"changes"`
+	HTMLURL          string `json:"html_url"`
+	ContentsURL      string `json:"contents_url"`
+	RawURL           string `json:"raw_url"`
+}
+
 // ListPullRequestsOptions options for listing pull requests
 type ListPullRequestsOptions struct {
 	ListOptions
@@ -348,3 +361,21 @@ func fixPullHeadSha(client *Client, pr *PullRequest) error {
 	}
 	return nil
 }
+
+// ListPullRequestFilesOptions options for listing pull request files
+type ListPullRequestFilesOptions struct {
+	ListOptions
+}
+
+// ListPullRequestFiles list changed files for a pull request
+func (c *Client) ListPullRequestFiles(owner, repo string, index int64, opt ListPullRequestFilesOptions) ([]*ChangedFile, *Response, error) {
+	if err := escapeValidatePathSegments(&owner, &repo); err != nil {
+		return nil, nil, err
+	}
+	link, _ := url.Parse(fmt.Sprintf("/repos/%s/%s/pulls/%d/files", owner, repo, index))
+	opt.setDefaults()
+	files := make([]*ChangedFile, 0, opt.PageSize)
+	link.RawQuery = opt.getURLQuery().Encode()
+	resp, err := c.getParsedResponse("GET", link.String(), nil, nil, &files)
+	return files, resp, err
+}
diff --git a/gitea/pull_test.go b/gitea/pull_test.go
index f3b31b9..3bdcd92 100644
--- a/gitea/pull_test.go
+++ b/gitea/pull_test.go
@@ -71,6 +71,16 @@ func TestPull(t *testing.T) {
 		assert.EqualValues(t, "LICENSE", commits[0].Files[0].Filename)
 	}
 
+	files, _, err := c.ListPullRequestFiles(c.username, repoName, pullUpdateFile.Index, ListPullRequestFilesOptions{})
+	assert.NoError(t, err)
+	assert.Len(t, files, 1)
+	file := files[0]
+	assert.EqualValues(t, "LICENSE", file.Filename)
+	assert.EqualValues(t, "changed", file.Status)
+	assert.EqualValues(t, 3, file.Additions)
+	assert.EqualValues(t, 9, file.Deletions)
+	assert.EqualValues(t, 12, file.Changes)
+
 	// test Update pull
 	pr, _, err := c.GetPullRequest(user.UserName, repoName, pullUpdateFile.Index)
 	assert.NoError(t, err)