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Implement GROUP command
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parent
796f37d55c
commit
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@ -21,7 +21,7 @@
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- :heavy_check_mark: `QUIT`
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- :x: `ARTICLE`
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- :x: `BODY`
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- :x: `GROUP`
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- :heavy_check_mark: `GROUP`
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- :x: `HDR`
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- :x: `HEAD`
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- :x: `HELP`
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@ -83,3 +83,8 @@ func (sb *SQLiteBackend) GetGroupLowWaterMark(g models.Group) (int, error) {
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var waterMark int
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return waterMark, sb.db.Get(&waterMark, "SELECT article_id FROM articles_to_groups WHERE group_id = ? ORDER BY article_id LIMIT 1", g.ID)
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}
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func (sb *SQLiteBackend) GetGroup(groupName string) (models.Group, error) {
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var group models.Group
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return group, sb.db.Get(&group, "SELECT * FROM groups WHERE group_name = ?", groupName)
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}
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@ -9,6 +9,7 @@ const (
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type StorageBackend interface {
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ListGroups() ([]models.Group, error)
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ListGroupsByPattern(pattern string) ([]models.Group, error)
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GetGroup(groupName string) (models.Group, error)
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GetArticlesCount(g models.Group) (int, error)
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GetGroupLowWaterMark(g models.Group) (int, error)
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GetGroupHighWaterMark(g models.Group) (int, error)
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@ -11,6 +11,7 @@ const (
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CommandDate = "DATE"
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CommandMode = "MODE"
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CommandList = "LIST"
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CommandGroup = "GROUP"
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)
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const (
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@ -34,4 +35,5 @@ const (
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MessageErrorHappened = "403 Failed to process command:"
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MessageListOfNewsgroupsFollows = "215 list of newsgroups follows"
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MessageSyntaxError = "501 Syntax Error"
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MessageNoSuchGroup = "411 No such newsgroup"
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)
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@ -1,6 +1,7 @@
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package server
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import (
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"database/sql"
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"fmt"
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"github.com/ChronosX88/yans/internal/backend"
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"github.com/ChronosX88/yans/internal/models"
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@ -23,6 +24,7 @@ func NewHandler(b backend.StorageBackend) *Handler {
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protocol.CommandQuit: h.handleQuit,
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protocol.CommandList: h.handleList,
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protocol.CommandMode: h.handleModeReader,
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protocol.CommandGroup: h.handleGroup,
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}
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return h
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}
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@ -143,6 +145,39 @@ func (h *Handler) handleModeReader(s *Session, arguments []string, id uint) erro
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return s.tconn.PrintfLine(protocol.MessageReaderModePostingProhibited) // TODO vary on auth status
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}
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func (h *Handler) handleGroup(s *Session, 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 || len(arguments) > 1 {
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return s.tconn.PrintfLine(protocol.MessageSyntaxError)
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}
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g, err := h.backend.GetGroup(arguments[0])
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if err != nil {
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if err == sql.ErrNoRows {
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return s.tconn.PrintfLine(protocol.MessageNoSuchGroup)
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}
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return err
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}
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highWaterMark, err := h.backend.GetGroupHighWaterMark(g)
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if err != nil {
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return err
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}
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lowWaterMark, err := h.backend.GetGroupLowWaterMark(g)
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if err != nil {
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return err
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}
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articlesCount, err := h.backend.GetArticlesCount(g)
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if err != nil {
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return err
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}
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s.currentGroup = &g
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return s.tconn.PrintfLine("211 %d %d %d %s", articlesCount, lowWaterMark, highWaterMark, g.GroupName)
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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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@ -2,6 +2,7 @@ package server
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import (
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"context"
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"github.com/ChronosX88/yans/internal/models"
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"github.com/ChronosX88/yans/internal/protocol"
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"io"
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"log"
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@ -24,6 +25,8 @@ type Session struct {
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id string
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closed chan<- bool
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h *Handler
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currentGroup *models.Group
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mode SessionMode
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}
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