feat: Add log paginationHEADv0.0.19master

Now it is possible to navigate through all commit from a given repository.
It implements a simple navigation which will plenty for now.

3 files changed, 34 insertions, 19 deletions

diff --git a/pkg/git/git.go b/pkg/git/git.go
index 6221e33..b33afa7 100644
--- a/pkg/git/git.go
+++ b/pkg/git/git.go
@@ -16,8 +16,6 @@ import (
 	"github.com/go-git/go-git/v5/plumbing/object"
 )
 
-var ()
-
 var (
 	MissingRefErr  = errors.New("Reference not found")
 	TreeForFileErr = errors.New("Trying to get tree of a file")
@@ -96,30 +94,46 @@ func (g *GitRepository) LastCommit() (*object.Commit, error) {
 	return c, nil
 }
 
-func (g *GitRepository) Commits(count int) ([]*object.Commit, error) {
+func (g *GitRepository) Commits(count int, from string) ([]*object.Commit, *object.Commit, error) {
 	err := g.validateRef()
 	if err != nil {
-		return nil, err
+		return nil, nil, err
+	}
+
+	opts := &git.LogOptions{Order: git.LogOrderCommitterTime}
+
+	if from != "" {
+		hash, err := g.repository.ResolveRevision(plumbing.Revision(from))
+		if err != nil {
+			return nil, nil, errors.Join(MissingRefErr, err)
+		}
+		opts.From = *hash
 	}
 
-	ci, err := g.repository.Log(&git.LogOptions{From: g.ref})
+	ci, err := g.repository.Log(opts)
 	if err != nil {
-		return nil, fmt.Errorf("commits from ref: %w", err)
+		return nil, nil, fmt.Errorf("commits from ref: %w", err)
 	}
 
 	commits := []*object.Commit{}
-	// TODO: for now only load first 1000
-	for x := 0; x < count; x++ {
+	var next *object.Commit
+
+	// iterate one more item so we can fetch the next commit
+	for x := 0; x < (count + 1); x++ {
 		c, err := ci.Next()
 		if err != nil && errors.Is(err, io.EOF) {
 			break
 		} else if err != nil {
-			return nil, err
+			return nil, nil, err
+		}
+		if x == count {
+			next = c
+		} else {
+			commits = append(commits, c)
 		}
-		commits = append(commits, c)
 	}
 
-	return commits, nil
+	return commits, next, nil
 }
 
 func (g *GitRepository) Head() (*plumbing.Reference, error) {
@@ -438,7 +452,6 @@ func (t *TagReference) Message() string {
 		return t.tag.Message
 	}
 	return ""
-
 }
 
 func (self *tagList) Len() int {
diff --git a/pkg/handler/git/handler.go b/pkg/handler/git/handler.go
index 6225b1a..436d364 100644
--- a/pkg/handler/git/handler.go
+++ b/pkg/handler/git/handler.go
@@ -130,7 +130,7 @@ func (g *GitHandler) Summary(w http.ResponseWriter, r *http.Request) error {
 		return err
 	}
 
-	commits, err := g.gitService.ListCommits(name, "", 10)
+	commits, _, err := g.gitService.ListCommits(name, "", "", 10)
 	if err != nil {
 		return err
 	}
@@ -324,8 +324,9 @@ func (g *GitHandler) Log(w http.ResponseWriter, r *http.Request) error {
 	ext.SetHTML(w)
 	name := r.PathValue("name")
 	ref := r.PathValue("ref")
+	from := r.URL.Query().Get("from")
 
-	commits, err := g.gitService.ListCommits(name, ref, 1000)
+	commits, next, err := g.gitService.ListCommits(name, ref, from, 100)
 	if err != nil {
 		return err
 	}
@@ -335,6 +336,7 @@ func (g *GitHandler) Log(w http.ResponseWriter, r *http.Request) error {
 		Ref:  ref,
 		GitItemBase: &templates.GitItemLogPage{
 			Commits: commits,
+			Next:    next,
 		},
 	}
 	templates.WritePageTemplate(w, gitList, r.Context())
diff --git a/pkg/service/git.go b/pkg/service/git.go
index 12d238e..2d00715 100644
--- a/pkg/service/git.go
+++ b/pkg/service/git.go
@@ -81,22 +81,22 @@ func (g *GitService) ListRepositories() ([]*Repository, error) {
 	return repos, nil
 }
 
-func (g *GitService) ListCommits(name, ref string, count int) ([]*object.Commit, error) {
+func (g *GitService) ListCommits(name, ref, from string, count int) ([]*object.Commit, *object.Commit, error) {
 	r := g.configRepo.GetByName(name)
 	if r == nil {
-		return nil, ErrRepositoryNotFound
+		return nil, nil, ErrRepositoryNotFound
 	}
 
 	repo, err := git.OpenRepository(r.Path)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
 	err = repo.SetRef(ref)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
-	return repo.Commits(count)
+	return repo.Commits(count, from)
 }
 
 func (g *GitService) LastCommit(name, ref string) (*object.Commit, error) {