From a49f79a06e6687510e19c4e166312ec95984e632 Mon Sep 17 00:00:00 2001
From: Frank Mayer <gh@frankmayer.dev>
Date: Sun, 5 Jan 2025 07:35:12 +0100
Subject: [PATCH] request

---
 internal/roast/info.go    | 19 ++++++++++++
 internal/roast/request.go | 61 ++++++++++++++++++++++++++++++++++++---
 internal/roast/roast.go   |  6 ++++
 internal/util/textedit.go | 52 +++++++++++++++++++++++++++++++++
 4 files changed, 134 insertions(+), 4 deletions(-)
 create mode 100644 internal/util/textedit.go

diff --git a/internal/roast/info.go b/internal/roast/info.go
index 2896da9..1c46ea1 100644
--- a/internal/roast/info.go
+++ b/internal/roast/info.go
@@ -1,5 +1,10 @@
 package roast
 
+import (
+	"os/exec"
+	"strings"
+)
+
 func (r *Roast) CurrentBranchName() (string, bool) {
 	head, err := r.repo.Head()
 	if err != nil {
@@ -8,3 +13,17 @@ func (r *Roast) CurrentBranchName() (string, bool) {
 
 	return head.Name().Short(), true
 }
+
+var gitusername string
+
+func GitUserName() string {
+	if len(gitusername) != 0 {
+		return gitusername
+	}
+	if out, err := exec.Command("git", "config", "user.name").Output(); err != nil {
+		return ""
+	} else {
+		gitusername = strings.TrimSpace(string(out))
+		return gitusername
+	}
+}
diff --git a/internal/roast/request.go b/internal/roast/request.go
index 1b1f322..f30cc0f 100644
--- a/internal/roast/request.go
+++ b/internal/roast/request.go
@@ -4,6 +4,14 @@ import (
 	"errors"
 	"fmt"
 	"git-roast/internal/log"
+	"git-roast/internal/util"
+	"net/url"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"time"
+
+	"github.com/go-git/go-git/v5"
 )
 
 func (r *Roast) Request(from string, into string) error {
@@ -19,13 +27,58 @@ func (r *Roast) Request(from string, into string) error {
 		return errors.Join(fmt.Errorf("failed to get target branch %s", from), err)
 	}
 
-	id := fmt.Sprintf(
-		"from_%s_into_%s",
+	id := url.PathEscape(fmt.Sprintf(
+		"%016x_from_%s_into_%s",
+		time.Now().Unix(),
 		sourceBranch.Name,
 		targetBranch.Name,
-	)
+	))
 
-	fmt.Println(id)
+	initialMessage, err := util.Textedit(fmt.Sprintf(
+		"%s is requesting merge into `%s` from `%s`\n",
+		GitUserName(),
+		into,
+		from,
+	))
+	if err != nil {
+		return err
+	}
 
+	p := filepath.Join(r.dir, id)
+	if err := os.MkdirAll(p, 0700); err != nil {
+		return errors.Join(errors.New("failed to create directory for request"), err)
+	}
+
+	successful := false
+	defer func() {
+		if !successful {
+            clean := exec.Command("git", "clean", "-xfd")
+            clean.Path = r.dir
+            _ = clean.Run()
+			log.Printf("action not successful, rollback...\n")
+			reset := exec.Command("git", "reset", "--hard")
+			reset.Path = r.dir
+			_ = reset.Run()
+		}
+	}()
+
+	f, err := os.Create(filepath.Join(p, fmt.Sprintf(
+		"%016x_%s.md",
+		time.Now().Unix(),
+		GitUserName(),
+	)))
+	if err != nil {
+		return errors.Join(errors.New("failed to create file for request"), err)
+	}
+
+	if _, err := f.Write([]byte(initialMessage)); err != nil {
+		return errors.Join(errors.New("failed to write to file for request"), err)
+	}
+
+	if err := r.repo.Push(&git.PushOptions{Atomic: true}); err != nil {
+		return errors.Join(errors.New("failed to push request"), err)
+	}
+
+	successful = true
 	return nil
 }
diff --git a/internal/roast/roast.go b/internal/roast/roast.go
index 5487b1a..61218d3 100644
--- a/internal/roast/roast.go
+++ b/internal/roast/roast.go
@@ -169,6 +169,12 @@ func Open() (*Roast, error) {
 		return nil, errors.Join(fmt.Errorf("failed to open roast repo %s", p), err)
 	}
 
+	pull := exec.Command("git", "pull", "--force")
+	pull.Dir = p
+	if err := pull.Run(); err != nil {
+		return nil, errors.Join(fmt.Errorf("failed to pull roast repo %s", p), err)
+	}
+
 	return &Roast{
 		repo: roastRepo,
 		dir:  p,
diff --git a/internal/util/textedit.go b/internal/util/textedit.go
new file mode 100644
index 0000000..476132d
--- /dev/null
+++ b/internal/util/textedit.go
@@ -0,0 +1,52 @@
+package util
+
+import (
+	"context"
+	"errors"
+	"io"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+)
+
+func Textedit(text string) (string, error) {
+	f, err := os.CreateTemp("", "git-roast-*.md")
+	if err != nil {
+		return text, errors.Join(errors.New("failed to create initial message in request"), err)
+	}
+	fp := f.Name()
+	defer os.Remove(fp)
+	f.Close()
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Minute)
+	defer cancel()
+	if err := exec.CommandContext(ctx, editor(), fp).Run(); err != nil {
+		return text, errors.Join(errors.New("failed to run text editor"), err)
+	}
+
+	f, err = os.OpenFile(fp, os.O_RDONLY|os.O_SYNC, 0)
+	if err != nil {
+		return text, errors.Join(errors.New("failed to open temp file"), err)
+	}
+	defer f.Close()
+
+	newContent, err := io.ReadAll(f)
+	if err != nil {
+		return text, errors.Join(errors.New("failed to read from temp file"), err)
+	}
+	return string(newContent), nil
+}
+
+func editor() string {
+	if gitCoreEditor, err := exec.Command("git", "config", "--global", "core.editor").Output(); err == nil {
+		return strings.TrimSpace(string(gitCoreEditor))
+	}
+	if gitEditor, ok := os.LookupEnv("GIT_EDITOR"); ok {
+		return gitEditor
+	}
+	if editor, ok := os.LookupEnv("EDITOR"); ok {
+		return editor
+	}
+
+	return "vim"
+}