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feat: add file/image attachment support to chat input (#22604)

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This change adds support for image attachments to chat via add button
and clipboard paste. Files are stored in a new `chat_files` table and
referenced by ID in message content. File data is resolved from storage
at LLM dispatch time, keeping the message content column small.

Upload validates MIME types via content type or content sniffing against
an allowlist (png, jpeg, gif, webp). The retrieval endpoint serves files
with immutable caching headers. On the frontend, uploads start eagerly
on attach with a background fetch to pre-warm the browser HTTP cache so
the timeline renders instantly after send.
This commit is contained in:
Mathias Fredriksson
2026-03-06 21:05:26 +02:00
committed by GitHub
parent 30a736c49e
commit a104d608a3
46 changed files with 3090 additions and 163 deletions
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coderd/database/dbmock/dbmock.go
+45
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@@ -1837,6 +1837,36 @@ func (mr *MockStoreMockRecorder) GetChatDiffStatusesByChatIDs(ctx, chatIds any)
return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetChatDiffStatusesByChatIDs", reflect.TypeOf((*MockStore)(nil).GetChatDiffStatusesByChatIDs), ctx, chatIds)
}
// GetChatFileByID mocks base method.
func (m *MockStore) GetChatFileByID(ctx context.Context, id uuid.UUID) (database.ChatFile, error) {
m.ctrl.T.Helper()
ret := m.ctrl.Call(m, "GetChatFileByID", ctx, id)
ret0, _ := ret[0].(database.ChatFile)
ret1, _ := ret[1].(error)
return ret0, ret1
}
// GetChatFileByID indicates an expected call of GetChatFileByID.
func (mr *MockStoreMockRecorder) GetChatFileByID(ctx, id any) *gomock.Call {
mr.mock.ctrl.T.Helper()
return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetChatFileByID", reflect.TypeOf((*MockStore)(nil).GetChatFileByID), ctx, id)
}
// GetChatFilesByIDs mocks base method.
func (m *MockStore) GetChatFilesByIDs(ctx context.Context, ids []uuid.UUID) ([]database.ChatFile, error) {
m.ctrl.T.Helper()
ret := m.ctrl.Call(m, "GetChatFilesByIDs", ctx, ids)
ret0, _ := ret[0].([]database.ChatFile)
ret1, _ := ret[1].(error)
return ret0, ret1
}
// GetChatFilesByIDs indicates an expected call of GetChatFilesByIDs.
func (mr *MockStoreMockRecorder) GetChatFilesByIDs(ctx, ids any) *gomock.Call {
mr.mock.ctrl.T.Helper()
return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetChatFilesByIDs", reflect.TypeOf((*MockStore)(nil).GetChatFilesByIDs), ctx, ids)
}
// GetChatMessageByID mocks base method.
func (m *MockStore) GetChatMessageByID(ctx context.Context, id int64) (database.ChatMessage, error) {
m.ctrl.T.Helper()
@@ -5511,6 +5541,21 @@ func (mr *MockStoreMockRecorder) InsertChat(ctx, arg any) *gomock.Call {
return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "InsertChat", reflect.TypeOf((*MockStore)(nil).InsertChat), ctx, arg)
}
// InsertChatFile mocks base method.
func (m *MockStore) InsertChatFile(ctx context.Context, arg database.InsertChatFileParams) (database.InsertChatFileRow, error) {
m.ctrl.T.Helper()
ret := m.ctrl.Call(m, "InsertChatFile", ctx, arg)
ret0, _ := ret[0].(database.InsertChatFileRow)
ret1, _ := ret[1].(error)
return ret0, ret1
}
// InsertChatFile indicates an expected call of InsertChatFile.
func (mr *MockStoreMockRecorder) InsertChatFile(ctx, arg any) *gomock.Call {
mr.mock.ctrl.T.Helper()
return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "InsertChatFile", reflect.TypeOf((*MockStore)(nil).InsertChatFile), ctx, arg)
}
// InsertChatMessage mocks base method.
func (m *MockStore) InsertChatMessage(ctx context.Context, arg database.InsertChatMessageParams) (database.ChatMessage, error) {
m.ctrl.T.Helper()