feat: Add actual git listing implementation

7 files changed, 149 insertions, 16 deletions

diff --git a/pkg/git/git.go b/pkg/git/git.go
new file mode 100644
index 0000000..85a3b95
--- /dev/null
+++ b/pkg/git/git.go
@@ -0,0 +1,82 @@
+package git
+
+import (
+	"errors"
+	"os"
+	"path"
+
+	"git.gabrielgio.me/cerrado/pkg/u"
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing/object"
+)
+
+var (
+	ScanPathErr    = errors.New("Scan path does not exist")
+	RepoPathErr    = errors.New("Repository path does not exist")
+	missingHeadErr = errors.New("Head not found")
+)
+
+type (
+	GitServerRepository struct {
+		scanPath string
+	}
+
+	GitRepository struct {
+		path string
+	}
+)
+
+func NewGitServerRepository(scanPath string) *GitServerRepository {
+	return &GitServerRepository{scanPath}
+}
+
+func NewGitRepository(dir string) *GitRepository {
+	return &GitRepository{
+		path: dir,
+	}
+}
+
+func (g *GitServerRepository) List() ([]*GitRepository, error) {
+	if !u.FileExist(g.scanPath) {
+		return nil, ScanPathErr
+	}
+
+	entries, err := os.ReadDir(g.scanPath)
+	if err != nil {
+		return nil, err
+	}
+
+	repos := make([]*GitRepository, 0)
+	for _, e := range entries {
+		if !e.IsDir() {
+			continue
+		}
+
+		fullPath := path.Join(g.scanPath, e.Name())
+		repos = append(repos, NewGitRepository(fullPath))
+	}
+
+	return repos, nil
+}
+
+func (g *GitRepository) Path() string {
+	return g.path
+}
+
+func (g *GitRepository) LastCommit() (*object.Commit, error) {
+	repo, err := git.PlainOpen(g.path)
+	if err != nil {
+		return nil, err
+	}
+
+	ref, err := repo.Head()
+	if err != nil {
+		return nil, errors.Join(missingHeadErr, err)
+	}
+
+	c, err := repo.CommitObject(ref.Hash())
+	if err != nil {
+		return nil, err
+	}
+	return c, nil
+}
diff --git a/pkg/handler/git.go b/pkg/handler/git.go
index 5b09121..1ed2c49 100644
--- a/pkg/handler/git.go
+++ b/pkg/handler/git.go
@@ -1,6 +1,7 @@
 package handler
 
 import (
+	"log/slog"
 	"net/http"
 
 	"git.gabrielgio.me/cerrado/pkg/service"
@@ -16,6 +17,12 @@ func NewGitHandler(gitService *service.GitService) *GitHandler {
 }
 
 func (g *GitHandler) List(w http.ResponseWriter, _ *http.Request) {
-	gitList := &templates.GitListPage{g.gitService.ListRepositories()}
+	repos, err := g.gitService.ListRepositories()
+	if err != nil {
+		slog.Error("Error listing repo", "error", err)
+		return
+	}
+
+	gitList := &templates.GitListPage{repos}
 	templates.WritePageTemplate(w, gitList)
 }
diff --git a/pkg/handler/status.go b/pkg/handler/status.go
index 2a84a7e..1ca7f70 100644
--- a/pkg/handler/status.go
+++ b/pkg/handler/status.go
@@ -19,7 +19,7 @@ func ConfigFile(configPath string) func(http.ResponseWriter, *http.Request) {
 	return func(w http.ResponseWriter, _ *http.Request) {
 		f, err := os.Open(configPath)
 		if err != nil {
-			slog.Error("Error openning config file json", "error", err, "path", configPath)
+			slog.Error("Error openning config file", "error", err, "path", configPath)
 			return
 		}
 
diff --git a/pkg/service/git.go b/pkg/service/git.go
index 0415cee..94ca75e 100644
--- a/pkg/service/git.go
+++ b/pkg/service/git.go
@@ -1,30 +1,53 @@
 package service
 
-import "fmt"
+import (
+	"path"
+
+	"git.gabrielgio.me/cerrado/pkg/git"
+)
 
 type (
-	GitService struct{}
+	GitService struct {
+		server *git.GitServerRepository
+	}
 	Repository struct {
-		Name        string
-		Title       string
-		Description string
+		Name              string
+		Title             string
+		LastCommitMessage string
+		LastCommitDate    string
 	}
 )
 
-func NewGitService() *GitService {
-	return &GitService{}
+// TODO: make it configurable
+const timeFormat = "2006.01.02 15:04:05"
+
+func NewGitService(server *git.GitServerRepository) *GitService {
+	return &GitService{
+		server: server,
+	}
 }
 
-func (g *GitService) ListRepositories() []*Repository {
-	repos := make([]*Repository, 10)
+func (g *GitService) ListRepositories() ([]*Repository, error) {
+	rs, err := g.server.List()
+	if err != nil {
+		return nil, err
+	}
+
+	repos := make([]*Repository, len(rs))
+	for i, r := range rs {
+		obj, err := r.LastCommit()
+		if err != nil {
+			return nil, err
+		}
 
-	for i := range 10 {
+		baseName := path.Base(r.Path())
 		repos[i] = &Repository{
-			Name:        fmt.Sprintf("repository-%d", i),
-			Title:       fmt.Sprintf("Repository %d", i),
-			Description: fmt.Sprintf("This is a description for repository %d", i),
+			Name:              baseName,
+			Title:             baseName,
+			LastCommitMessage: obj.Message,
+			LastCommitDate:    obj.Author.When.Format(timeFormat),
 		}
 	}
 
-	return repos
+	return repos, nil
 }
diff --git a/pkg/u/file.go b/pkg/u/file.go
new file mode 100644
index 0000000..cf86c75
--- /dev/null
+++ b/pkg/u/file.go
@@ -0,0 +1,21 @@
+package u
+
+import (
+	"errors"
+	"log/slog"
+	"os"
+)
+
+func FileExist(filename string) bool {
+	if _, err := os.Stat(filename); err == nil {
+		return true
+
+	} else if errors.Is(err, os.ErrNotExist) {
+		return false
+	} else {
+		slog.Warn("Schrödinger's file: it may or may not exist", "file", filename) 
+		// Schrodinger: file may or may not exist. To be extra safe it will
+		// report the file doest not exist
+		return false
+	}
+}
diff --git a/pkg/u/util.go b/pkg/u/list.go
index 34eafd1..34eafd1 100644
--- a/pkg/u/util.go
+++ b/pkg/u/list.go
diff --git a/pkg/u/util_test.go b/pkg/u/list_test.go
index a6d84c7..a6d84c7 100644
--- a/pkg/u/util_test.go
+++ b/pkg/u/list_test.go