refactor backend API structure

internal/httpapi/openai/shared/handler_toolcall_format.go

@@ -0,0 +1,101 @@
+package shared
+
+import (
+	"ds2api/internal/toolcall"
+	"encoding/json"
+	"strings"
+
+	"github.com/google/uuid"
+
+	"ds2api/internal/toolstream"
+)
+
+func FormatIncrementalStreamToolCallDeltas(deltas []toolstream.ToolCallDelta, ids map[int]string) []map[string]any {
+	if len(deltas) == 0 {
+		return nil
+	}
+	out := make([]map[string]any, 0, len(deltas))
+	for _, d := range deltas {
+		if d.Name == "" && d.Arguments == "" {
+			continue
+		}
+		callID, ok := ids[d.Index]
+		if !ok || callID == "" {
+			callID = "call_" + strings.ReplaceAll(uuid.NewString(), "-", "")
+			ids[d.Index] = callID
+		}
+		item := map[string]any{
+			"index": d.Index,
+			"id":    callID,
+			"type":  "function",
+		}
+		fn := map[string]any{}
+		if d.Name != "" {
+			fn["name"] = d.Name
+		}
+		if d.Arguments != "" {
+			fn["arguments"] = d.Arguments
+		}
+		if len(fn) > 0 {
+			item["function"] = fn
+		}
+		out = append(out, item)
+	}
+	return out
+}
+
+func FilterIncrementalToolCallDeltasByAllowed(deltas []toolstream.ToolCallDelta, seenNames map[int]string) []toolstream.ToolCallDelta {
+	if len(deltas) == 0 {
+		return nil
+	}
+	out := make([]toolstream.ToolCallDelta, 0, len(deltas))
+	for _, d := range deltas {
+		if d.Name != "" {
+			if seenNames != nil {
+				seenNames[d.Index] = d.Name
+			}
+			out = append(out, d)
+			continue
+		}
+		if seenNames == nil {
+			out = append(out, d)
+			continue
+		}
+		name := strings.TrimSpace(seenNames[d.Index])
+		if name == "" {
+			continue
+		}
+		out = append(out, d)
+	}
+	return out
+}
+
+func FormatFinalStreamToolCallsWithStableIDs(calls []toolcall.ParsedToolCall, ids map[int]string) []map[string]any {
+	if len(calls) == 0 {
+		return nil
+	}
+	out := make([]map[string]any, 0, len(calls))
+	for i, c := range calls {
+		callID := ""
+		if ids != nil {
+			callID = strings.TrimSpace(ids[i])
+		}
+		if callID == "" {
+			callID = "call_" + strings.ReplaceAll(uuid.NewString(), "-", "")
+			if ids != nil {
+				ids[i] = callID
+			}
+		}
+		args, _ := json.Marshal(c.Input)
+		out = append(out, map[string]any{
+			"index": i,
+			"id":    callID,
+			"type":  "function",
+			"function": map[string]any{
+				"name":      c.Name,
+				"arguments": string(args),
+			},
+		})
+	}
+	return out
+}