From 3a04085d3a4a04a9f8b8c847a1bb21df0347c3a7 Mon Sep 17 00:00:00 2001
From: Yves Biener <yves.biener@gmx.de>
Date: Thu, 19 Oct 2023 22:29:29 +0200
Subject: [PATCH] add(repository): discover repository informations

This implemtation determines the git remote origin url and extracts the
information for the owner and repo names for the api url's. WIP for #2.
---
 cmd/gitw/main.go             | 17 ++++++++++++++++-
 internal/gitea/repository.go | 24 ++++++++++++++++++++++-
 internal/gitw/discover.go    | 37 ++++++++++++++++++++++++++++++++++++
 3 files changed, 76 insertions(+), 2 deletions(-)
 create mode 100644 internal/gitw/discover.go

diff --git a/cmd/gitw/main.go b/cmd/gitw/main.go
index ebc88e4..6a1629c 100644
--- a/cmd/gitw/main.go
+++ b/cmd/gitw/main.go
@@ -5,11 +5,26 @@ import (
 	"os"
 
 	"gitea.yves-biener.de/yves-biener/gitwarrior/internal/gitea"
+	"gitea.yves-biener.de/yves-biener/gitwarrior/internal/gitw"
 )
 
 func main() {
-	repository := gitea.NewRepository("gitwarrior", "yves-biener")
+	// TODO: server url may be also be derived from the git configuration?
 	server := gitea.NewGitea("https://gitea.yves-biener.de")
+
+	repository, err := gitw.Discover()
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(-1)
+	}
+	repository, err = server.VerifyRepository(repository)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(-1)
+	}
+	fmt.Printf("%#v\n", repository)
+	fmt.Println("---")
+
 	issue, err := server.GetIssue(repository, 1)
 	if err != nil {
 		fmt.Fprintln(os.Stderr, err)
diff --git a/internal/gitea/repository.go b/internal/gitea/repository.go
index 6cd5f68..32dc2f1 100644
--- a/internal/gitea/repository.go
+++ b/internal/gitea/repository.go
@@ -1,6 +1,10 @@
 package gitea
 
-import "fmt"
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+)
 
 type Repository struct {
 	Id        uint
@@ -15,3 +19,21 @@ func NewRepository(name, owner string) (repo Repository) {
 	repo.Full_name = fmt.Sprintf("%s/%s", owner, name)
 	return
 }
+
+func (gitea *Gitea) VerifyRepository(repository Repository) (Repository, error) {
+	url := fmt.Sprintf("%s/repos/%s", gitea.Url(), repository.Full_name)
+	response, err := http.Get(url)
+	if err != nil {
+		return repository, err
+	}
+	defer response.Body.Close()
+	var data map[string]interface{}
+	decoder := json.NewDecoder(response.Body)
+	if err = decoder.Decode(&data); err != nil {
+		return repository, err
+	}
+	// extract the id value to the current repository
+	// NOTE: there may be other informations we also want to capture here as well
+	repository.Id = uint(data["id"].(float64))
+	return repository, nil
+}
diff --git a/internal/gitw/discover.go b/internal/gitw/discover.go
new file mode 100644
index 0000000..6e4a7ce
--- /dev/null
+++ b/internal/gitw/discover.go
@@ -0,0 +1,37 @@
+package gitw
+
+import (
+	"errors"
+	"fmt"
+	"os/exec"
+	"regexp"
+	"strings"
+
+	"gitea.yves-biener.de/yves-biener/gitwarrior/internal/gitea"
+)
+
+func Discover() (gitea.Repository, error) {
+	var repository gitea.Repository
+	cmd := exec.Command("git", "remote", "get-url", "origin")
+	out, err := cmd.Output()
+	if err != nil {
+		return repository, err
+	}
+	re := regexp.MustCompile("^git@.*:(.*).git")
+	matches := re.FindAllStringSubmatch(string(out), -1)
+	var match string
+	if len(matches) > 0 && len(matches[0]) == 2 {
+		match = matches[0][1] // get the first match which is the Full_name of the repository
+		if len(match) <= 0 {
+			return repository, errors.New("No matching group found. Are you in a git repository?")
+		}
+	} else {
+		return repository, errors.New("No matching group found. Are you in a git repository?")
+	}
+	repo := strings.Split(match, "/")
+	if len(repo) != 2 {
+		msg := fmt.Sprintf("Expected remote url to contain {owner}/{repo}, but found: %#v", repo)
+		return repository, errors.New(msg)
+	}
+	return gitea.NewRepository(repo[1], repo[0]), nil
+}