X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=common.go;h=d6357fc984e9ba37c1850c05e2f9403135618b7c;hb=a4e509fa3e93e999c4d878303be799d07b5a73ae;hp=ebb5a9d1b7d0f0f93e33af16f09db0c43b475925;hpb=0bcc06cc15038729af1c09a42ac4f22a56b35100;p=sgblog.git

diff --git a/common.go b/common.go
index ebb5a9d..d6357fc 100644
--- a/common.go
+++ b/common.go
@@ -1,7 +1,89 @@
 // SGBlog -- Git-backed CGI/inetd blogging/phlogging engine
 package sgblog
 
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"sort"
+	"text/scanner"
+
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing"
+	"github.com/go-git/go-git/v5/plumbing/object"
+	"go.cypherpunks.ru/recfile"
+)
+
 const (
 	Version = "0.17.0"
 	WhenFmt = "2006-01-02 15:04:05Z07:00"
 )
+
+func ParseComments(data []byte) []string {
+	comments := []string{}
+	r := recfile.NewReader(bytes.NewReader(data))
+	for {
+		fields, err := r.Next()
+		if err != nil {
+			break
+		}
+		if len(fields) != 3 ||
+			fields[0].Name != "From" ||
+			fields[1].Name != "Date" ||
+			fields[2].Name != "Body" {
+			continue
+		}
+		comments = append(comments, fmt.Sprintf(
+			"%s: %s\n%s: %s\n%s",
+			fields[0].Name, fields[0].Value,
+			fields[1].Name, fields[1].Value,
+			fields[2].Value,
+		))
+	}
+	return comments
+}
+
+func ParseTopics(data []byte) []string {
+	var s scanner.Scanner
+	s.Init(bytes.NewBuffer(data))
+	topics := []string{}
+	for tok := s.Scan(); tok != scanner.EOF; tok = s.Scan() {
+		topics = append(topics, s.TokenText())
+	}
+	sort.Strings(topics)
+	return topics
+}
+
+func GetNote(repo *git.Repository, tree *object.Tree, what plumbing.Hash) []byte {
+	if tree == nil {
+		return nil
+	}
+	var entry *object.TreeEntry
+	var err error
+	paths := make([]string, 3)
+	paths[0] = what.String()
+	paths[1] = paths[0][:2] + "/" + paths[0][2:]
+	paths[2] = paths[1][:4+1] + "/" + paths[1][4+1:]
+	for _, p := range paths {
+		entry, err = tree.FindEntry(p)
+		if err == nil {
+			break
+		}
+	}
+	if entry == nil {
+		return nil
+	}
+	blob, err := repo.BlobObject(entry.Hash)
+	if err != nil {
+		return nil
+	}
+	r, err := blob.Reader()
+	if err != nil {
+		return nil
+	}
+	data, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil
+	}
+	return bytes.TrimSuffix(data, []byte{'\n'})
+}