Class: ChatsController

Inherits:
ApplicationController
  • Object
show all
Includes:
ChatManager::ChatManageable, ChatManager::CsvDownloadable, PromptNavigator::HistoryManageable
Defined in:
lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb

Defined Under Namespace

Classes: InvalidGenerationSettingsError

Instance Method Summary collapse

Instance Method Details

#add_prompt ⇒ Object

Add a prompt to a specific chat identified by URL uuid. This is the tab-safe entry point: chat identity comes from the URL, not session, so navigation in another tab can never re-target the prompt.



160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
 
# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 160

def add_prompt
  jwt_token = current_user.jwt_token if user_signed_in?

  scope = user_signed_in? ? current_user.chats : Chat.where(user_id: nil)
  @chat = scope.find_by!(uuid: params[:id])

  initialize_chat current_user&.chats
  add_chat @chat
  set_active_chat_uuid(@chat&.uuid)
  @messages = @chat&.ordered_messages || []
  initialize_history @chat&.ordered_by_descending_prompt_executions

  if params[:message].present?
    begin
      generation_settings_param
    rescue InvalidGenerationSettingsError => e
      @error_message = e.message
      respond_to do |format|
        format.turbo_stream { render :create }
        format.html { redirect_to chat_path(@chat.uuid), alert: e.message }
      end
      return
    end

    @prompt_execution, @user_message = @chat.add_user_message(params[:message],
                                                              params[:api_key_uuid],
                                                              params[:model],
                                                              params[:branch_from_uuid],
                                                              llm_platform: params[:family],
                                                              image: uploaded_image_payload)
    push_to_history @prompt_execution
    set_active_message_uuid(@prompt_execution&.execution_id || params.dig(:chat, :branch_from_uuid))

    @generation_settings_json = params[:generation_settings_json]
    @tool_ids = Array(params[:tool_ids]).reject(&:blank?)
  end

  @llm_families = LlmMetaClient::ServerResource.available_llm_families(jwt_token) rescue []

  respond_to do |format|
    format.turbo_stream { render :create }
    format.html { redirect_to chat_path(@chat.uuid) }
  end
rescue ActiveRecord::RecordNotFound
  redirect_to root_path, alert: "Chat not found."
end

#batch_destroy ⇒ Object 



128
129
130
131
132
133
 
# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 128

def batch_destroy
  scope = user_signed_in? ? current_user.chats : Chat.where(user_id: nil)
  uuids = Array(params[:uuids]).reject(&:blank?)
  scope.where(uuid: uuids).destroy_all
  redirect_to root_path
end

#create ⇒ Object 



51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
 
# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 51

def create
  jwt_token = current_user.jwt_token if user_signed_in?

  # Initialize chat sidebar
  initialize_chat current_user&.chats

  # Always create a new chat — URL/form is the source of truth for chat
  # identity, not session[:chat_id]. This makes the entry point tab-safe:
  # cross-tab navigation can no longer rewrite the "current chat" under us.
  @chat = Chat.create!(user: current_user)
  add_chat @chat
  set_active_chat_uuid(@chat&.uuid)
  @messages = @chat&.ordered_messages || []

  # initialize history for the chat
  initialize_history @chat&.ordered_by_descending_prompt_executions

  if params[:message].present?
    # Validate generation settings before proceeding (raises if invalid).
    # The streaming controller re-parses them from the URL.
    begin
      generation_settings_param
    rescue InvalidGenerationSettingsError => e
      @error_message = e.message
      respond_to do |format|
        format.turbo_stream
        format.html { redirect_to new_chat_path, alert: e.message }
      end
      return
    end

    # Add user message (will be rendered via turbo stream)
    @prompt_execution, @user_message = @chat.add_user_message(params[:message],
                                                              params[:api_key_uuid],
                                                              params[:model],
                                                              params[:branch_from_uuid],
                                                              llm_platform: params[:family],
                                                              image: uploaded_image_payload)
    # Push to history for rendering
    push_to_history @prompt_execution
    # Set active message UUID for highlighting in UI
    set_active_message_uuid(@prompt_execution&.execution_id || params.dig(:chat, :branch_from_uuid))

    # The assistant response is streamed by ChatStreamsController (SSE).
    # The streaming bubble is rendered by create.turbo_stream.erb and opens
    # the EventSource on connect; persistence + title gen happen at stream close.
    @generation_settings_json = params[:generation_settings_json]
    @tool_ids = Array(params[:tool_ids]).reject(&:blank?)
  end

  # Return turbo stream to render both messages
  respond_to do |format|
    format.turbo_stream
    format.html { redirect_to new_chat_path }
  end
end

#destroy ⇒ Object 



108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
 
# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 108

def destroy
  scope = user_signed_in? ? current_user.chats : Chat.where(user_id: nil)
  chat = scope.find_by(uuid: params[:id])
  # "Currently viewing this chat" is now identified by the URL the user
  # came from (referrer), since chat identity is URL-local, not session.
  was_viewed = chat && request.referer.to_s.include?("/chats/#{chat.uuid}")
  chat&.destroy

  initialize_chat(user_signed_in? ? current_user.chats : nil)

  if was_viewed
    redirect_to root_path
  else
    respond_to do |format|
      format.turbo_stream
      format.html { redirect_to root_path }
    end
  end
end

#new ⇒ Object 



34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
 
# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 34

def new
  # Pure new-chat form. No chat row is created until the user actually
  # submits, and nothing is read from session — so opening "/" in a second
  # tab can never surface a previously-active chat from another tab.
  initialize_chat current_user&.chats
  @chat = nil
  @messages = []
  initialize_history []

  jwt_token = current_user.jwt_token if user_signed_in?
  @llm_families = LlmMetaClient::ServerResource.available_llm_families(jwt_token)
rescue StandardError => e
  Rails.logger.error "Error in ChatsController#new: #{e.class} - #{e.message}\n#{e.backtrace&.join("\n")}"
  @llm_families = []
  flash.now[:alert] = "Chat service is currently unavailable. Please try again later."
end

#show ⇒ Object 



9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 9

def show
  # Initialize chat context
  initialize_chat current_user&.chats

  @chat = current_user&.chats.includes(:messages).find_by!(uuid: params[:id])
  set_active_chat_uuid(@chat&.uuid)
  @messages = @chat.ordered_messages

  # Initialize history
  initialize_history @chat.ordered_by_descending_prompt_executions

  # Get LLM options available for users
  jwt_token = current_user.jwt_token if user_signed_in?
  @llm_families = LlmMetaClient::ServerResource.available_llm_families(jwt_token)

  # Set active UUID for history sidebar highlighting
  @prompt_execution = @chat.ordered_by_descending_prompt_executions.first
  set_active_message_uuid(@prompt_execution&.execution_id)

  render "chats/edit"
rescue StandardError => e
  Rails.logger.error "Error in PromptsController#show: #{e.class} - #{e.message}\n#{e.backtrace&.join("\n")}"
  redirect_to root_path, alert: "Message not found."
end

#start_new ⇒ Object 



153
154
155
 
# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 153

def start_new
  redirect_to root_path
end

#update_title ⇒ Object 



135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
 
# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 135

def update_title
  chat = current_user.chats.find_by!(uuid: params[:id])
  title = params[:title].to_s.strip

  if title.blank?
    render json: { error: "Title cannot be blank" }, status: :unprocessable_entity
    return
  end

  title = title.truncate(255)
  chat.update!(title: title)

  render json: {
    title: title,
    truncated_title: title.truncate(30)
  }
end