refactor(core): 脚本收口——只留 agent 出稿,删旧散文路 + 单镜重跑改走 agent

删 /generate-script/ 端点 + generate_project_script + build_script_prompt + 旧单镜 build_segment_rerun_prompt;前端删静默兜底(agent 失败明确报错,不再掉回旧路)+ onGenerateScript prop/api。rerun-script-segment 改用 agent 单镜逻辑(regenerate_segment_via_agent:读全脚本上下文/保留其余镜/落新版本)。根因:旧路不产 script_entities/entity_refs,下游故事板/视频参考图断线→图飘。测试:删 3 个旧 generate 用例 + 重写 rerun 为 agent 版,ai+projects 23 测试除 4 个既有 base-asset 失败外全绿。 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-17 22:16:01 +08:00
parent 0695c36f4c
commit 1ecb186ddf
7 changed files with 102 additions and 316 deletions
@@ -673,3 +673,68 @@ def _load_base_draft(project, base_version_id: str) -> dict | None:
        return json.loads(version.content)
    except (ValueError, TypeError):
        return None
+
+
+def regenerate_segment_via_agent(*, project, user, model_config: ModelConfig, segment, instruction: str = ""):
+    """非流式·精准改一镜(「场次刷新」按钮复用 agent 单镜逻辑):读全脚本上下文,只重写该镜,落新 ScriptVersion。
+    与 stream_script_agent 的 target_index 分支同源,但同步返回(不走 SSE)。计费 reserve→charge/release 闭环。"""
+    from django.db import transaction
+
+    from apps.ai.services import build_provider, create_ai_task
+    from apps.billing.services.ledger import charge_reserved_credit
+
+    base_version = segment.script_version
+    base_draft = _load_base_draft(project, str(base_version.id))
+    if base_draft is None:
+        raise ValueError("基准脚本无法解析,无法精准改镜")
+    target_index = segment.sort_order
+    aspect_ratio = (base_draft.get("aspect_ratio") or "9:16").strip()
+    total_duration = base_draft.get("total_duration") or 60
+    seg_n = len(base_draft.get("segments", []))
+    if not (0 <= target_index < seg_n):
+        raise ValueError(f"镜号越界:第 {target_index + 1} 镜(共 {seg_n} 镜)")
+
+    messages = build_agent_messages(
+        project=project,
+        mode="revise",
+        user_prompt=instruction,
+        selling_point_ids=None,
+        base_draft=base_draft,
+        aspect_ratio=aspect_ratio,
+        total_duration=total_duration,
+        target_index=target_index,
+    )
+    task = create_ai_task(
+        project=project,
+        user=user,
+        task_type=AITask.Type.SCRIPT_OPTIMIZATION,
+        model_config=model_config,
+        request_payload={
+            "model": model_config.name,
+            "endpoint": model_config.endpoint,
+            "mode": "revise",
+            "target_index": target_index,
+        },
+    )
+    reservation = task.credit_reservation
+    try:
+        task.status = AITask.Status.SUBMITTED
+        task.submitted_at = timezone.now()
+        task.save(update_fields=["status", "submitted_at", "updated_at"])
+        provider = build_provider(model_config)
+        response = provider.chat_completion(model=model_config.name, endpoint=model_config.endpoint, messages=messages)
+        raw = provider.extract_text(response)
+        draft = normalize_draft(raw, aspect_ratio=aspect_ratio, total_duration=total_duration)
+        draft = _merge_single_segment(base_draft, draft, target_index, aspect_ratio, total_duration)
+        with transaction.atomic():
+            task.status = AITask.Status.SUCCEEDED
+            task.response_payload = {"raw": raw[:8000]}
+            task.actual_cost = task.estimated_cost
+            task.completed_at = timezone.now()
+            task.save(update_fields=["status", "response_payload", "actual_cost", "completed_at", "updated_at"])
+            charge_reserved_credit(reservation=reservation, actual_amount=task.actual_cost)
+            script = persist_script_draft(project=project, user=user, task=task, draft=draft, source="revise")
+        return script
+    except Exception:
+        _fail_task(task, reservation, "单镜重跑失败")
+        raise