Implement `lmcli view [conversation]` with completions

Separate out logic to retrieve a message's "friendly" role (System,
User, Assistant)

pkg/cli/cmd.go

@@ -111,11 +111,36 @@ var lsCmd = &cobra.Command{
 }
 
 var viewCmd = &cobra.Command{
-	Use:   "view",
+	Use:   "view [conversation]",
 	Short: "View messages in a conversation",
-	Long:  `Displays all the messages in a coversation.`,
+	Long:  `Finds a conversation by its short name and displays its contents.`,
+	Args: func(cmd *cobra.Command, args []string) error {
+		argCount := 1
+		if err := cobra.MinimumNArgs(argCount)(cmd, args); err != nil {
+			return err
+		}
+		return nil
+	},
 	Run: func(cmd *cobra.Command, args []string) {
-		fmt.Println("Displaying conversation messages...")
+		shortName := args[0]
+		conversation, err := store.ConversationByShortName(shortName)
+		if conversation.ID == 0 {
+			Fatal("Conversation not found with short name: %s\n", shortName)
+		}
+
+		messages, err := store.GetMessages(conversation)
+		if err != nil {
+			Fatal("Could not retrieve messages for conversation: %s\n", conversation.Title)
+		}
+
+		l := len(messages)
+		for i, message := range messages {
+			message.RenderTTY(i < l-1)
+		}
+		fmt.Println()
+	},
+	ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		return store.ConverstionShortNameCompletions(toComplete), cobra.ShellCompDirectiveNoFileComp
 	},
 }
 
@@ -239,6 +264,7 @@ func NewRootCmd() *cobra.Command {
 		lsCmd,
 		newCmd,
 		promptCmd,
+		viewCmd,
 	)
 	return rootCmd
 }

pkg/cli/conversation.go

@@ -0,0 +1,17 @@
+package cli
+
+// FriendlyRole returns a human friendly signifier for the message's role.
+func (m *Message) FriendlyRole() string {
+	var friendlyRole string
+	switch m.Role {
+	case "user":
+		friendlyRole = "You"
+	case "system":
+		friendlyRole = "System"
+	case "assistant":
+		friendlyRole = "Assistant"
+	default:
+		friendlyRole = m.Role
+	}
+	return friendlyRole
+}

pkg/cli/store.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 	"time"
 
 	sqids "github.com/sqids/sqids-go"
@@ -95,6 +96,23 @@ func (s *Store) GetConversations() ([]Conversation, error) {
 	return conversations, err
 }
 
+func (s *Store) ConverstionShortNameCompletions(shortName string) []string {
+	var completions []string
+	conversations, _ := s.GetConversations() // ignore error for completions
+	for _, conversation := range conversations {
+		if shortName == "" || strings.HasPrefix(conversation.ShortName.String, shortName) {
+			completions = append(completions, fmt.Sprintf("%s\t%s", conversation.ShortName.String, conversation.Title))
+		}
+	}
+	return completions
+}
+
+func (s *Store) ConversationByShortName(shortName string) (*Conversation, error) {
+	var conversation Conversation
+	err := s.db.Where("short_name = ?", shortName).Find(&conversation).Error
+	return &conversation, err
+}
+
 func (s *Store) GetMessages(conversation *Conversation) ([]Message, error) {
 	var messages []Message
 	err := s.db.Where("conversation_id = ?", conversation.ID).Find(&messages).Error

pkg/cli/tty.go

@@ -59,16 +59,7 @@ func HandleDelayedResponse(response chan string) string {
 }
 
 func (m *Message) RenderTTY(paddingDown bool) {
-	var friendlyRole string
+	fmt.Printf("<%s>\n\n", m.FriendlyRole())
-	switch m.Role {
-		case "user":
-			friendlyRole = "You"
-		case "system":
-			friendlyRole = "System"
-		case "assistant":
-			friendlyRole = "Assistant"
-	}
-	fmt.Printf("<%s>\n\n", friendlyRole)
 	if m.OriginalContent != "" {
 		fmt.Print(m.OriginalContent)
 	}