feat: Add blob endpoint

4 files changed, 178 insertions, 5 deletions

diff --git a/pkg/git/git.go b/pkg/git/git.go
index ce72465..6a7b91f 100644
--- a/pkg/git/git.go
+++ b/pkg/git/git.go
@@ -13,7 +13,8 @@ import (
 var ()
 
 var (
-	MissingRefErr = errors.New("Reference not found")
+	MissingRefErr  = errors.New("Reference not found")
+	TreeForFileErr = errors.New("Trying to get tree of a file")
 )
 
 type (
@@ -145,9 +146,73 @@ func (g *GitRepository) Branches() ([]*plumbing.Reference, error) {
 	return branches, nil
 }
 
+func (g *GitRepository) Tree(path string) (*object.Tree, error) {
+	err := g.validateRef()
+	if err != nil {
+		return nil, err
+	}
+
+	c, err := g.repository.CommitObject(g.ref)
+	if err != nil {
+		return nil, err
+	}
+
+	tree, err := c.Tree()
+	if err != nil {
+		return nil, err
+	}
+
+	if path == "" {
+		return tree, nil
+	} else {
+		o, err := tree.FindEntry(path)
+		if err != nil {
+			return nil, err
+		}
+
+		if !o.Mode.IsFile() {
+			subtree, err := tree.Tree(path)
+			if err != nil {
+				return nil, err
+			}
+			return subtree, nil
+		} else {
+			return nil, TreeForFileErr
+		}
+	}
+}
+
 func (g *GitRepository) validateRef() error {
 	if !g.setRef {
 		return g.SetRef("")
 	}
 	return nil
 }
+
+func (g *GitRepository) FileContent(path string) (string, error) {
+	c, err := g.repository.CommitObject(g.ref)
+	if err != nil {
+		return "", err
+	}
+
+	tree, err := c.Tree()
+	if err != nil {
+		return "", err
+	}
+
+	file, err := tree.File(path)
+	if err != nil {
+		return "", err
+	}
+
+	isbin, err := file.IsBinary()
+	if err != nil {
+		return "", err
+	}
+
+	if !isbin {
+		return file.Contents()
+	} else {
+		return "Binary file", nil
+	}
+}
diff --git a/pkg/handler/git/handler.go b/pkg/handler/git/handler.go
index e2f4042..f3e74c7 100644
--- a/pkg/handler/git/handler.go
+++ b/pkg/handler/git/handler.go
@@ -1,11 +1,17 @@
 package git
 
 import (
+	"bytes"
 	"log/slog"
 	"net/http"
+	"path/filepath"
 
 	"git.gabrielgio.me/cerrado/pkg/service"
 	"git.gabrielgio.me/cerrado/templates"
+	"github.com/alecthomas/chroma/v2"
+	"github.com/alecthomas/chroma/v2/formatters/html"
+	"github.com/alecthomas/chroma/v2/lexers"
+	"github.com/alecthomas/chroma/v2/styles"
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/object"
 )
@@ -19,6 +25,8 @@ type (
 		ListRepositories() ([]*service.Repository, error)
 		ListCommits(name string, ref string) ([]*object.Commit, error)
 		GetHead(name string) (*plumbing.Reference, error)
+		GetTree(name, ref, path string) (*object.Tree, error)
+		GetFileContent(name, ref, path string) (string, error)
 		ListTags(name string) ([]*object.Tag, error)
 		ListBranches(name string) ([]*plumbing.Reference, error)
 	}
@@ -107,10 +115,64 @@ func (g *GitHandler) Refs(w http.ResponseWriter, r *http.Request) {
 func (g *GitHandler) Tree(w http.ResponseWriter, r *http.Request) {
 	name := r.PathValue("name")
 	ref := r.PathValue("ref")
+	rest := r.PathValue("rest")
+
+	tree, err := g.gitService.GetTree(name, ref, rest)
+	if err != nil {
+		slog.Error("Error loading tree", "error", err)
+		return
+	}
+
 	gitList := &templates.GitItemPage{
-		Name:        name,
-		Ref:         ref,
-		GitItemBase: &templates.GitItemTreePage{},
+		Name: name,
+		Ref:  ref,
+		GitItemBase: &templates.GitItemTreePage{
+			CurrentPath: rest,
+			Tree:        tree,
+			Ref:         ref,
+			Name:        name,
+		},
+	}
+	templates.WritePageTemplate(w, gitList)
+}
+
+func (g *GitHandler) Blob(w http.ResponseWriter, r *http.Request) {
+	name := r.PathValue("name")
+	ref := r.PathValue("ref")
+	rest := r.PathValue("rest")
+
+	file, err := g.gitService.GetFileContent(name, ref, rest)
+	if err != nil {
+		slog.Error("Error loading blob", "error", err)
+		return
+	}
+
+	filename := filepath.Base(rest)
+	lexer := GetLexers(filename)
+	style := styles.Get("xcode")
+	formatter := html.New(
+		html.WithLineNumbers(true),
+	)
+	iterator, err := lexer.Tokenise(nil, file)
+	if err != nil {
+		slog.Error("Error tokenise", "error", err)
+		return
+	}
+
+	var code bytes.Buffer
+	err = formatter.Format(&code, style, iterator)
+	if err != nil {
+		slog.Error("Error format", "error", err)
+		return
+	}
+
+	gitList := &templates.GitItemPage{
+		Name: name,
+		Ref:  ref,
+		GitItemBase: &templates.GitItemBlobPage{
+			File:    rest,
+			Content: code.Bytes(),
+		},
 	}
 	templates.WritePageTemplate(w, gitList)
 }
@@ -134,3 +196,16 @@ func (g *GitHandler) Log(w http.ResponseWriter, r *http.Request) {
 	}
 	templates.WritePageTemplate(w, gitList)
 }
+
+func GetLexers(filename string) chroma.Lexer {
+	if filename == "APKBUILD" {
+		return lexers.Get("sh")
+	}
+
+	lexer := lexers.Get(filename)
+
+	if lexer == nil {
+		lexer = lexers.Get("txt")
+	}
+	return lexer
+}
diff --git a/pkg/handler/router.go b/pkg/handler/router.go
index bdf883e..ed782f7 100644
--- a/pkg/handler/router.go
+++ b/pkg/handler/router.go
@@ -35,7 +35,8 @@ func MountHandler(
 	mux.HandleFunc("/{name}/about/{$}", gitHandler.About)
 	mux.HandleFunc("/{name}", gitHandler.Summary)
 	mux.HandleFunc("/{name}/refs/{$}", gitHandler.Refs)
-	mux.HandleFunc("/{name}/tree/{ref}", gitHandler.Tree)
+	mux.HandleFunc("/{name}/tree/{ref}/{rest...}", gitHandler.Tree)
+	mux.HandleFunc("/{name}/blob/{ref}/{rest...}", gitHandler.Blob)
 	mux.HandleFunc("/{name}/log/{ref}", gitHandler.Log)
 	mux.HandleFunc("/config", configHander)
 	mux.HandleFunc("/about", aboutHandler.About)
diff --git a/pkg/service/git.go b/pkg/service/git.go
index 9bf11f4..f886785 100644
--- a/pkg/service/git.go
+++ b/pkg/service/git.go
@@ -89,6 +89,38 @@ func (g *GitService) ListCommits(name, ref string) ([]*object.Commit, error) {
 	return repo.Commits()
 }
 
+func (g *GitService) GetTree(name, ref, path string) (*object.Tree, error) {
+	// TODO: handle nil
+	r := g.configRepo.GetByName(name)
+
+	repo, err := git.OpenRepository(r.Path)
+	if err != nil {
+		return nil, err
+	}
+	err = repo.SetRef(ref)
+	if err != nil {
+		return nil, err
+	}
+
+	return repo.Tree(path)
+}
+
+func (g *GitService) GetFileContent(name, ref, path string) (string, error) {
+	// TODO: handle nil
+	r := g.configRepo.GetByName(name)
+
+	repo, err := git.OpenRepository(r.Path)
+	if err != nil {
+		return "", err
+	}
+	err = repo.SetRef(ref)
+	if err != nil {
+		return "", err
+	}
+
+	return repo.FileContent(path)
+}
+
 func (g *GitService) ListTags(name string) ([]*object.Tag, error) {
 	// TODO: handle nil
 	r := g.configRepo.GetByName(name)