381 lines
10 KiB
Go
381 lines
10 KiB
Go
package handlers
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import (
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"database/sql"
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"math"
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"net/http"
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"strconv"
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"github.com/gin-gonic/gin"
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"github.com/lib/pq"
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"git.gobha.me/xcaliber/chat-switchboard/database"
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)
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// ── Request / Response types ────────────────
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type createChatRequest struct {
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Title string `json:"title" binding:"required,max=500"`
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Model string `json:"model,omitempty"`
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SystemPrompt string `json:"system_prompt,omitempty"`
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APIConfigID *string `json:"api_config_id,omitempty"`
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Folder string `json:"folder,omitempty"`
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Tags []string `json:"tags,omitempty"`
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}
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type updateChatRequest struct {
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Title *string `json:"title,omitempty"`
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Model *string `json:"model,omitempty"`
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SystemPrompt *string `json:"system_prompt,omitempty"`
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APIConfigID *string `json:"api_config_id,omitempty"`
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IsArchived *bool `json:"is_archived,omitempty"`
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IsPinned *bool `json:"is_pinned,omitempty"`
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Folder *string `json:"folder,omitempty"`
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Tags []string `json:"tags,omitempty"`
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}
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type chatResponse struct {
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ID string `json:"id"`
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UserID string `json:"user_id"`
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Title string `json:"title"`
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Model *string `json:"model"`
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APIConfigID *string `json:"api_config_id"`
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SystemPrompt *string `json:"system_prompt"`
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IsArchived bool `json:"is_archived"`
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IsPinned bool `json:"is_pinned"`
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Folder *string `json:"folder"`
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Tags []string `json:"tags"`
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MessageCount int `json:"message_count"`
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CreatedAt string `json:"created_at"`
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UpdatedAt string `json:"updated_at"`
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}
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type paginatedResponse struct {
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Data interface{} `json:"data"`
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Page int `json:"page"`
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PerPage int `json:"per_page"`
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Total int `json:"total"`
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TotalPages int `json:"total_pages"`
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}
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// ChatHandler holds dependencies for chat endpoints.
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type ChatHandler struct{}
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// NewChatHandler creates a new chat handler.
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func NewChatHandler() *ChatHandler {
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return &ChatHandler{}
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}
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// ── Helpers ─────────────────────────────────
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// getUserID extracts the authenticated user's ID from context.
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func getUserID(c *gin.Context) string {
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uid, _ := c.Get("user_id")
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s, _ := uid.(string)
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return s
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}
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// parsePagination reads page and per_page from query params with defaults.
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func parsePagination(c *gin.Context) (page, perPage, offset int) {
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page, _ = strconv.Atoi(c.DefaultQuery("page", "1"))
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perPage, _ = strconv.Atoi(c.DefaultQuery("per_page", "50"))
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if page < 1 {
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page = 1
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}
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if perPage < 1 {
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perPage = 50
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}
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if perPage > 100 {
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perPage = 100
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}
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offset = (page - 1) * perPage
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return
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}
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// ── List Chats ──────────────────────────────
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func (h *ChatHandler) ListChats(c *gin.Context) {
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userID := getUserID(c)
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page, perPage, offset := parsePagination(c)
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// Optional filters
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archived := c.DefaultQuery("archived", "false")
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folder := c.Query("folder")
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// Count total
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var total int
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countQuery := `SELECT COUNT(*) FROM chats WHERE user_id = $1 AND is_archived = $2`
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countArgs := []interface{}{userID, archived == "true"}
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if folder != "" {
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countQuery += ` AND folder = $3`
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countArgs = append(countArgs, folder)
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}
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if err := database.DB.QueryRow(countQuery, countArgs...).Scan(&total); err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to count chats"})
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return
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}
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// Fetch chats with message count
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query := `
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SELECT c.id, c.user_id, c.title, c.model, c.api_config_id,
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c.system_prompt, c.is_archived, c.is_pinned, c.folder, c.tags,
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COALESCE(mc.cnt, 0) AS message_count,
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c.created_at, c.updated_at
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FROM chats c
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LEFT JOIN (
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SELECT chat_id, COUNT(*) AS cnt FROM chat_messages GROUP BY chat_id
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) mc ON mc.chat_id = c.id
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WHERE c.user_id = $1 AND c.is_archived = $2`
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args := []interface{}{userID, archived == "true"}
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argN := 3
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if folder != "" {
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query += ` AND c.folder = $` + strconv.Itoa(argN)
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args = append(args, folder)
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argN++
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}
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query += ` ORDER BY c.is_pinned DESC, c.updated_at DESC
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LIMIT $` + strconv.Itoa(argN) + ` OFFSET $` + strconv.Itoa(argN+1)
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args = append(args, perPage, offset)
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rows, err := database.DB.Query(query, args...)
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if err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list chats"})
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return
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}
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defer rows.Close()
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chats := make([]chatResponse, 0)
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for rows.Next() {
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var chat chatResponse
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var tags []string
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err := rows.Scan(
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&chat.ID, &chat.UserID, &chat.Title, &chat.Model, &chat.APIConfigID,
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&chat.SystemPrompt, &chat.IsArchived, &chat.IsPinned, &chat.Folder,
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pq.Array(&tags),
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&chat.MessageCount, &chat.CreatedAt, &chat.UpdatedAt,
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)
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if err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to scan chat"})
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return
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}
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if tags == nil {
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tags = []string{}
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}
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chat.Tags = tags
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chats = append(chats, chat)
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}
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c.JSON(http.StatusOK, paginatedResponse{
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Data: chats,
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Page: page,
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PerPage: perPage,
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Total: total,
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TotalPages: int(math.Ceil(float64(total) / float64(perPage))),
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})
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}
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// ── Create Chat ─────────────────────────────
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func (h *ChatHandler) CreateChat(c *gin.Context) {
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userID := getUserID(c)
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var req createChatRequest
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if err := c.ShouldBindJSON(&req); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
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return
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}
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if req.Tags == nil {
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req.Tags = []string{}
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}
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var chat chatResponse
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var tags []string
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err := database.DB.QueryRow(`
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INSERT INTO chats (user_id, title, model, system_prompt, api_config_id, folder, tags)
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VALUES ($1, $2, $3, $4, $5, $6, $7)
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RETURNING id, user_id, title, model, api_config_id, system_prompt,
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is_archived, is_pinned, folder, tags, created_at, updated_at
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`, userID, req.Title, req.Model, req.SystemPrompt, req.APIConfigID,
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req.Folder, pq.Array(req.Tags),
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).Scan(
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&chat.ID, &chat.UserID, &chat.Title, &chat.Model, &chat.APIConfigID,
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&chat.SystemPrompt, &chat.IsArchived, &chat.IsPinned, &chat.Folder,
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pq.Array(&tags), &chat.CreatedAt, &chat.UpdatedAt,
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)
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if err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to create chat"})
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return
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}
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if tags == nil {
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tags = []string{}
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}
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chat.Tags = tags
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chat.MessageCount = 0
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c.JSON(http.StatusCreated, chat)
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}
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// ── Get Chat ────────────────────────────────
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func (h *ChatHandler) GetChat(c *gin.Context) {
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userID := getUserID(c)
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chatID := c.Param("id")
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var chat chatResponse
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var tags []string
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err := database.DB.QueryRow(`
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SELECT c.id, c.user_id, c.title, c.model, c.api_config_id,
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c.system_prompt, c.is_archived, c.is_pinned, c.folder, c.tags,
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COALESCE(mc.cnt, 0) AS message_count,
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c.created_at, c.updated_at
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FROM chats c
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LEFT JOIN (
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SELECT chat_id, COUNT(*) AS cnt FROM chat_messages GROUP BY chat_id
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) mc ON mc.chat_id = c.id
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WHERE c.id = $1 AND c.user_id = $2
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`, chatID, userID).Scan(
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&chat.ID, &chat.UserID, &chat.Title, &chat.Model, &chat.APIConfigID,
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&chat.SystemPrompt, &chat.IsArchived, &chat.IsPinned, &chat.Folder,
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pq.Array(&tags),
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&chat.MessageCount, &chat.CreatedAt, &chat.UpdatedAt,
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)
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if err == sql.ErrNoRows {
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c.JSON(http.StatusNotFound, gin.H{"error": "chat not found"})
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return
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}
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if err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get chat"})
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return
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}
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if tags == nil {
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tags = []string{}
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}
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chat.Tags = tags
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c.JSON(http.StatusOK, chat)
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}
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// ── Update Chat ─────────────────────────────
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func (h *ChatHandler) UpdateChat(c *gin.Context) {
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userID := getUserID(c)
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chatID := c.Param("id")
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if database.DB == nil {
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c.JSON(http.StatusServiceUnavailable, gin.H{"error": "database unavailable"})
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return
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}
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var req updateChatRequest
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if err := c.ShouldBindJSON(&req); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
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return
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}
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// Verify ownership
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var ownerID string
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err := database.DB.QueryRow(`SELECT user_id FROM chats WHERE id = $1`, chatID).Scan(&ownerID)
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if err == sql.ErrNoRows {
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c.JSON(http.StatusNotFound, gin.H{"error": "chat not found"})
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return
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}
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if ownerID != userID {
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c.JSON(http.StatusForbidden, gin.H{"error": "not your chat"})
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return
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}
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// Build dynamic UPDATE
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setClauses := []string{}
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args := []interface{}{}
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argN := 1
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addClause := func(col string, val interface{}) {
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setClauses = append(setClauses, col+" = $"+strconv.Itoa(argN))
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args = append(args, val)
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argN++
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}
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if req.Title != nil {
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addClause("title", *req.Title)
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}
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if req.Model != nil {
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addClause("model", *req.Model)
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}
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if req.SystemPrompt != nil {
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addClause("system_prompt", *req.SystemPrompt)
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}
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if req.APIConfigID != nil {
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addClause("api_config_id", *req.APIConfigID)
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}
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if req.IsArchived != nil {
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addClause("is_archived", *req.IsArchived)
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}
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if req.IsPinned != nil {
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addClause("is_pinned", *req.IsPinned)
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}
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if req.Folder != nil {
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addClause("folder", *req.Folder)
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}
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if req.Tags != nil {
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addClause("tags", pq.Array(req.Tags))
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}
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if len(setClauses) == 0 {
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c.JSON(http.StatusBadRequest, gin.H{"error": "no fields to update"})
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return
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}
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query := "UPDATE chats SET "
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for i, clause := range setClauses {
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if i > 0 {
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query += ", "
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}
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query += clause
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}
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query += " WHERE id = $" + strconv.Itoa(argN) + " AND user_id = $" + strconv.Itoa(argN+1)
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args = append(args, chatID, userID)
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_, err = database.DB.Exec(query, args...)
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if err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to update chat"})
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return
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}
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// Return updated chat
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h.GetChat(c)
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}
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// ── Delete Chat ─────────────────────────────
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func (h *ChatHandler) DeleteChat(c *gin.Context) {
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userID := getUserID(c)
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chatID := c.Param("id")
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result, err := database.DB.Exec(
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`DELETE FROM chats WHERE id = $1 AND user_id = $2`,
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chatID, userID,
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)
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if err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to delete chat"})
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return
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}
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rows, _ := result.RowsAffected()
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if rows == 0 {
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c.JSON(http.StatusNotFound, gin.H{"error": "chat not found"})
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return
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}
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c.JSON(http.StatusOK, gin.H{"message": "chat deleted"})
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}
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