sync: migrate ai-operator to Gitea (2026-08-10)

internal/media/asteriskws/parser.go

@@ -0,0 +1,98 @@
+package asteriskws
+
+import (
+	"encoding/json"
+	"strconv"
+	"strings"
+
+	"ai-operator/internal/media"
+)
+
+type ControlEventType string
+
+const (
+	ControlMediaStart              ControlEventType = "MEDIA_START"
+	ControlDTMFEnd                 ControlEventType = "DTMF_END"
+	ControlMediaXOFF               ControlEventType = "MEDIA_XOFF"
+	ControlMediaXON                ControlEventType = "MEDIA_XON"
+	ControlStatus                  ControlEventType = "STATUS"
+	ControlMediaBufferingCompleted ControlEventType = "MEDIA_BUFFERING_COMPLETED"
+	ControlMediaMarkProcessed      ControlEventType = "MEDIA_MARK_PROCESSED"
+	ControlQueueDrained            ControlEventType = "QUEUE_DRAINED"
+	ControlUnknown                 ControlEventType = "UNKNOWN"
+)
+
+type ControlEvent struct {
+	Type   ControlEventType
+	Raw    string
+	Fields map[string]string
+}
+
+func ParseControlEvent(text string) ControlEvent {
+	raw := strings.TrimSpace(text)
+	if raw == "" {
+		return ControlEvent{Type: ControlUnknown, Raw: text, Fields: map[string]string{}}
+	}
+	if strings.HasPrefix(raw, "{") {
+		return parseJSONControl(raw)
+	}
+	parts := strings.Fields(raw)
+	fields := map[string]string{}
+	for _, part := range parts[1:] {
+		if k, v, ok := strings.Cut(part, ":"); ok {
+			fields[k] = v
+		} else if fields["correlation_id"] == "" {
+			fields["correlation_id"] = part
+		}
+	}
+	return ControlEvent{Type: knownType(parts[0]), Raw: raw, Fields: fields}
+}
+
+func parseJSONControl(raw string) ControlEvent {
+	var data map[string]any
+	if err := json.Unmarshal([]byte(raw), &data); err != nil {
+		return ControlEvent{Type: ControlUnknown, Raw: raw, Fields: map[string]string{"error": "invalid_json"}}
+	}
+	typeName, _ := data["event"].(string)
+	if typeName == "" {
+		typeName, _ = data["type"].(string)
+	}
+	fields := map[string]string{}
+	for k, v := range data {
+		switch t := v.(type) {
+		case string:
+			fields[k] = t
+		case float64:
+			fields[k] = strconv.Itoa(int(t))
+		case bool:
+			fields[k] = strconv.FormatBool(t)
+		}
+	}
+	return ControlEvent{Type: knownType(typeName), Raw: raw, Fields: fields}
+}
+
+func knownType(v string) ControlEventType {
+	switch ControlEventType(v) {
+	case ControlMediaStart, ControlDTMFEnd, ControlMediaXOFF, ControlMediaXON, ControlStatus, ControlMediaBufferingCompleted, ControlMediaMarkProcessed, ControlQueueDrained:
+		return ControlEventType(v)
+	}
+	return ControlUnknown
+}
+
+func (e ControlEvent) MediaStart() *media.MediaStartInfo {
+	if e.Type != ControlMediaStart {
+		return nil
+	}
+	opt, _ := strconv.Atoi(value(e.Fields, "optimal_frame_size", "optimalFrameSize"))
+	ptime, _ := strconv.Atoi(value(e.Fields, "ptime", "ptime_ms"))
+	return &media.MediaStartInfo{ConnectionID: e.Fields["connection_id"], Channel: e.Fields["channel"], ChannelID: e.Fields["channel_id"], Format: e.Fields["format"], OptimalFrameSize: opt, PTimeMS: ptime}
+}
+
+func value(m map[string]string, keys ...string) string {
+	for _, k := range keys {
+		if m[k] != "" {
+			return m[k]
+		}
+	}
+	return ""
+}