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Implement NEXT command
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parent
679c515ad1
commit
5c36bf1e71
@ -33,11 +33,11 @@
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- :x: `LIST OVERVIEW.FMT`
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- :x: `HDR`
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- :x: `LIST HEADERS`
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- :construction: Group and Article Selection
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- :heavy_check_mark: Group and Article Selection
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- :heavy_check_mark: `GROUP`
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- :heavy_check_mark: `LISTGROUP`
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- :heavy_check_mark: `LAST`
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- :x: `NEXT`
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- :heavy_check_mark: `NEXT`
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- :construction: The LIST Commands
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- :heavy_check_mark: `LIST ACTIVE`
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- :heavy_check_mark: `LIST NEWSGROUPS`
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@ -184,6 +184,17 @@ func (sb *SQLiteBackend) GetLastArticleByNum(g *models.Group, a *models.Article)
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return lastArticle, json.Unmarshal([]byte(a.HeaderRaw), &a.Header)
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}
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func (sb *SQLiteBackend) GetNextArticleByNum(g *models.Group, a *models.Article) (models.Article, error) {
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var lastArticle models.Article
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if err := sb.db.Get(&lastArticle, "SELECT articles.* FROM articles INNER JOIN articles_to_groups atg on atg.article_id = articles.id WHERE atg.article_number > ? AND atg.group_id = ? LIMIT 1", a.ArticleNumber, g.ID); err != nil {
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return lastArticle, err
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}
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if err := sb.db.Get(&a.ArticleNumber, "SELECT article_number FROM articles_to_groups WHERE article_id = ?", a.ID); err != nil {
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return lastArticle, err
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}
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return lastArticle, json.Unmarshal([]byte(a.HeaderRaw), &a.Header)
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}
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func (sb *SQLiteBackend) GetNewArticlesSince(timestamp int64) ([]string, error) {
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var articleIds []string
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return articleIds, sb.db.Select(&articleIds, "SELECT json_extract(articles.header, '$.Message-Id[0]') FROM articles WHERE created_at > datetime(?, 'unixepoch')", timestamp)
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@ -20,4 +20,5 @@ type StorageBackend interface {
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GetArticleNumbers(g *models.Group, low, high int64) ([]int64, error)
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GetNewArticlesSince(timestamp int64) ([]string, error)
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GetLastArticleByNum(g *models.Group, a *models.Article) (models.Article, error)
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GetNextArticleByNum(g *models.Group, a *models.Article) (models.Article, error)
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}
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@ -63,6 +63,7 @@ const (
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CommandHelp = "HELP"
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CommandNewNews = "NEWNEWS"
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CommandLast = "LAST"
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CommandNext = "NEXT"
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)
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const (
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@ -43,6 +43,7 @@ func NewHandler(b backend.StorageBackend, serverDomain string) *Handler {
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protocol.CommandHelp: h.handleHelp,
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protocol.CommandNewNews: h.handleNewNews,
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protocol.CommandLast: h.handleLast,
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protocol.CommandNext: h.handleNext,
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}
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h.serverDomain = serverDomain
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return h
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@ -663,6 +664,42 @@ func (h *Handler) handleLast(s *Session, command string, arguments []string, id
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return s.tconn.PrintfLine(protocol.NNTPResponse{Code: 223, Message: fmt.Sprintf("%d %s retrieved", a.ArticleNumber, a.Header.Get("Message-ID"))}.String())
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}
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func (h *Handler) handleNext(s *Session, command string, arguments []string, id uint) error {
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s.tconn.StartResponse(id)
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defer s.tconn.EndResponse(id)
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if len(arguments) != 0 {
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return s.tconn.PrintfLine(protocol.ErrSyntaxError.String())
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}
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if s.currentGroup == nil {
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return s.tconn.PrintfLine(protocol.NNTPResponse{Code: 412, Message: "no newsgroup selected"}.String())
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}
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if s.currentArticle == nil {
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return s.tconn.PrintfLine(protocol.NNTPResponse{Code: 420, Message: "No current article selected"}.String())
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}
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high, err := h.backend.GetGroupHighWaterMark(s.currentGroup)
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if err != nil {
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return err
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}
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if s.currentArticle.ArticleNumber == high {
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return s.tconn.PrintfLine(protocol.NNTPResponse{Code: 421, Message: "No next article to retrieve"}.String())
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}
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a, err := h.backend.GetNextArticleByNum(s.currentGroup, s.currentArticle)
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if err != nil {
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if err == sql.ErrNoRows {
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return s.tconn.PrintfLine(protocol.NNTPResponse{Code: 421, Message: "No next article to retrieve"}.String())
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}
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return err
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}
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return s.tconn.PrintfLine(protocol.NNTPResponse{Code: 223, Message: fmt.Sprintf("%d %s retrieved", a.ArticleNumber, a.Header.Get("Message-ID"))}.String())
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}
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func (h *Handler) Handle(s *Session, message string, id uint) error {
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splittedMessage := strings.Split(message, " ")
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for i, v := range splittedMessage {
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