refactor backend API structure

internal/util/standard_request.go

@@ -1,87 +0,0 @@
-package util
-
-import "ds2api/internal/config"
-
-type StandardRequest struct {
-	Surface        string
-	RequestedModel string
-	ResolvedModel  string
-	ResponseModel  string
-	Messages       []any
-	HistoryText    string
-	ToolsRaw       any
-	FinalPrompt    string
-	ToolNames      []string
-	ToolChoice     ToolChoicePolicy
-	Stream         bool
-	Thinking       bool
-	Search         bool
-	RefFileIDs     []string
-	PassThrough    map[string]any
-}
-
-type ToolChoiceMode string
-
-const (
-	ToolChoiceAuto     ToolChoiceMode = "auto"
-	ToolChoiceNone     ToolChoiceMode = "none"
-	ToolChoiceRequired ToolChoiceMode = "required"
-	ToolChoiceForced   ToolChoiceMode = "forced"
-)
-
-type ToolChoicePolicy struct {
-	Mode       ToolChoiceMode
-	ForcedName string
-	Allowed    map[string]struct{}
-}
-
-func DefaultToolChoicePolicy() ToolChoicePolicy {
-	return ToolChoicePolicy{Mode: ToolChoiceAuto}
-}
-
-func (p ToolChoicePolicy) IsNone() bool {
-	return p.Mode == ToolChoiceNone
-}
-
-func (p ToolChoicePolicy) IsRequired() bool {
-	return p.Mode == ToolChoiceRequired || p.Mode == ToolChoiceForced
-}
-
-func (p ToolChoicePolicy) Allows(name string) bool {
-	if len(p.Allowed) == 0 {
-		return true
-	}
-	_, ok := p.Allowed[name]
-	return ok
-}
-
-func (r StandardRequest) CompletionPayload(sessionID string) map[string]any {
-	modelID := r.ResolvedModel
-	if modelID == "" {
-		modelID = r.RequestedModel
-	}
-	modelType := "default"
-	if resolvedType, ok := config.GetModelType(modelID); ok {
-		modelType = resolvedType
-	}
-	refFileIDs := make([]any, 0, len(r.RefFileIDs))
-	for _, fileID := range r.RefFileIDs {
-		if fileID == "" {
-			continue
-		}
-		refFileIDs = append(refFileIDs, fileID)
-	}
-	payload := map[string]any{
-		"chat_session_id":   sessionID,
-		"model_type":        modelType,
-		"parent_message_id": nil,
-		"prompt":            r.FinalPrompt,
-		"ref_file_ids":      refFileIDs,
-		"thinking_enabled":  r.Thinking,
-		"search_enabled":    r.Search,
-	}
-	for k, v := range r.PassThrough {
-		payload[k] = v
-	}
-	return payload
-}

internal/util/standard_request_test.go

@@ -1,57 +0,0 @@
-package util
-
-import "testing"
-
-func TestStandardRequestCompletionPayloadSetsModelTypeFromResolvedModel(t *testing.T) {
-	tests := []struct {
-		name      string
-		model     string
-		thinking  bool
-		search    bool
-		modelType string
-	}{
-		{name: "default", model: "deepseek-v4-flash", thinking: false, search: false, modelType: "default"},
-		{name: "expert", model: "deepseek-v4-pro", thinking: true, search: false, modelType: "expert"},
-		{name: "vision", model: "deepseek-v4-vision-search", thinking: false, search: true, modelType: "vision"},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			req := StandardRequest{
-				ResolvedModel: tc.model,
-				FinalPrompt:   "hello",
-				Thinking:      tc.thinking,
-				Search:        tc.search,
-				RefFileIDs:    []string{"file-a", "file-b"},
-				PassThrough: map[string]any{
-					"temperature": 0.3,
-				},
-			}
-
-			payload := req.CompletionPayload("session-123")
-
-			if got := payload["model_type"]; got != tc.modelType {
-				t.Fatalf("expected model_type %s, got %#v", tc.modelType, got)
-			}
-			if got := payload["chat_session_id"]; got != "session-123" {
-				t.Fatalf("unexpected chat_session_id: %#v", got)
-			}
-			if got := payload["thinking_enabled"]; got != tc.thinking {
-				t.Fatalf("unexpected thinking_enabled: %#v", got)
-			}
-			if got := payload["search_enabled"]; got != tc.search {
-				t.Fatalf("unexpected search_enabled: %#v", got)
-			}
-			if got := payload["temperature"]; got != 0.3 {
-				t.Fatalf("expected passthrough temperature, got %#v", got)
-			}
-			refFileIDs, ok := payload["ref_file_ids"].([]any)
-			if !ok {
-				t.Fatalf("expected ref_file_ids slice, got %#v", payload["ref_file_ids"])
-			}
-			if len(refFileIDs) != 2 || refFileIDs[0] != "file-a" || refFileIDs[1] != "file-b" {
-				t.Fatalf("unexpected ref_file_ids: %#v", refFileIDs)
-			}
-		})
-	}
-}