root
5302d7f531
1、后台页面/credit-ratios，需要选择视频，上边是模型价格，下边增加传入视频价格，也要输入对应的倍率、基础积分、每秒积分 2、前台/conversation获取积分逻辑的接口也要增加对应的传入视频的比例 3、然后前台根据用户上传视频自动获取对应的比例加上对应模型选择的积分计算总积分 4、后台提交也要验证对应的积分是否正确 5、多个视频总时长需限制15s，最低视频时长2s
328 lines
11 KiB
Python
328 lines
11 KiB
Python
import math
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from sqlalchemy import select, func
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.models.user import User
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from app.models.credit_record import CreditRecord
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from app.models.system_config import SystemConfig
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from app.models.video_engine import VideoEngine
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from app.models.image_engine import ImageEngine
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from app.models.credit_ratio import CreditRatio
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from app.utils.id_gen import generate_id
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from app.utils.exceptions import InsufficientCreditsError
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from app.services.credit_record_meta_service import CreditRecordMeta, with_user_snapshot
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async def calc_text_credits(db: AsyncSession, input_tokens: int, output_tokens: int) -> float:
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"""Calculate text credits based on actual token usage and configurable rate."""
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result = await db.execute(
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select(SystemConfig).where(SystemConfig.key == "text_credits_per_1000_tokens").limit(1)
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)
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config = result.scalar_one_or_none()
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rate = float(config.value) if config else 1.0
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total_tokens = input_tokens + output_tokens
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return round(total_tokens * rate / 1000, 2)
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async def _get_credit_ratio(
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db: AsyncSession,
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*,
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gen_type: str,
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resolution: str,
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engine_id: str | None = None,
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) -> CreditRatio | None:
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"""按引擎精确规则优先获取积分规则；找不到时回退到同类型同参数最高规则。"""
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gen_type = (gen_type or "").lower().strip()
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resolution = (resolution or "").strip()
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engine_id = (engine_id or "").strip() or None
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if engine_id:
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result = await db.execute(
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select(CreditRatio)
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.where(CreditRatio.gen_type == gen_type)
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.where(CreditRatio.model_config_id == engine_id)
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.where(CreditRatio.resolution == resolution)
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.order_by(CreditRatio.base_credits.desc(), CreditRatio.per_second_credits.desc())
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.limit(1)
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)
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ratio = result.scalar_one_or_none()
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if ratio:
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return ratio
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result = await db.execute(
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select(CreditRatio)
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.where(CreditRatio.gen_type == gen_type)
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.where(CreditRatio.resolution == resolution)
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.order_by(CreditRatio.base_credits.desc(), CreditRatio.per_second_credits.desc())
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.limit(1)
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)
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return result.scalar_one_or_none()
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async def calc_video_credits(
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db: AsyncSession,
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duration: int,
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resolution: str,
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engine_id: str | None = None,
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input_video_duration: float | None = None,
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) -> float:
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"""Calculate video credits using CreditRatio table, with fallback to hardcoded.
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查询优先级：
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1. gen_type=video + engine_id + resolution 精确规则；
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2. gen_type=video + resolution 下 base_credits/per_second_credits 最高规则；
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3. 原硬编码默认算法。
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input_video_duration: 用户上传的参考视频总时长（秒），不为空时额外计费
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"""
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if not engine_id:
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video_engines_result = await db.execute(
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select(VideoEngine.id)
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.where(VideoEngine.is_active == True)
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.order_by(VideoEngine.priority.desc())
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.limit(1)
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)
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engine_id = video_engines_result.scalar_one_or_none()
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ratio = await _get_credit_ratio(
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db,
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gen_type="video",
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resolution=resolution,
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engine_id=engine_id,
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)
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if ratio:
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base_cost = (ratio.base_credits + ratio.per_second_credits * duration) * ratio.ratio
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if input_video_duration and input_video_duration > 0:
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input_video_cost = (
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ratio.input_video_base_credits + ratio.input_video_per_second_credits * input_video_duration
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) * ratio.input_video_ratio
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base_cost += input_video_cost
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return round(base_cost, 2)
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base = 60.0
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duration_cost = duration * 2.0
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multiplier = {"480p": 1, "1080p": 2, "720p": 1.5}.get(resolution, 1.0)
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total = (base + duration_cost) * multiplier
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if input_video_duration and input_video_duration > 0:
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total += input_video_duration * 0.5 * multiplier
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return round(total, 2)
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def calc_credits(duration: int, resolution: str) -> float:
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"""Legacy: hardcoded credit calculation. Prefer calc_video_credits for new code."""
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base = 60.0
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duration_cost = duration * 2.0
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multiplier = {"480p": 2.5, "1080p": 1.5, "720p": 1.0}.get(resolution, 1.0)
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return round((base + duration_cost) * multiplier, 2)
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async def calc_image_credits(
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db: AsyncSession,
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image_size: str,
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engine_id: str | None = None,
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) -> float:
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"""Calculate image credits using CreditRatio table, with fallback to hardcoded.
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查询优先级：
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1. gen_type=image + engine_id + image_size 精确规则；
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2. gen_type=image + image_size 下 base_credits/per_second_credits 最高规则；
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3. 原硬编码默认算法。
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"""
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# 如果engine_id为空，默认查询权重最高的图片引擎积分规则
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if not engine_id:
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image_engines_result = await db.execute(
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select(ImageEngine.id)
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.where(ImageEngine.is_active == True)
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.order_by(ImageEngine.priority.desc())
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.limit(1)
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)
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engine_id = image_engines_result.scalar_one_or_none()
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ratio = await _get_credit_ratio(
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db,
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gen_type="image",
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resolution=image_size,
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engine_id=engine_id,
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)
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if ratio:
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return round(ratio.base_credits * ratio.ratio, 2)
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# Fallback
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multiplier = {"4K": 2.0, "2K": 1.0}.get(image_size, 1.0)
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base_cost = 4.0
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return round(base_cost * multiplier, 2)
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async def _get_existing_credit_record_by_biz_key(
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db: AsyncSession,
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*,
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user_id: str,
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biz_key: str | None,
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) -> CreditRecord | None:
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"""按正式业务幂等键查找已有积分流水。"""
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if not biz_key:
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return None
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result = await db.execute(
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select(CreditRecord)
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.where(CreditRecord.user_id == user_id, CreditRecord.biz_key == biz_key)
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.limit(1)
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)
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return result.scalar_one_or_none()
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async def deduct_credits(
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db: AsyncSession,
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user_id: str,
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amount: float,
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description: str,
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related_id: str | None = None,
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*,
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biz_key: str | None = None,
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refund_for_biz_key: str | None = None,
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record_meta: CreditRecordMeta | dict | None = None,
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) -> User:
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"""扣减用户积分，并写入消费流水。
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并发安全点：
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- 先用 SELECT ... FOR UPDATE 锁住 users 行，避免余额覆盖。
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- biz_key 不为空时，作为正式业务幂等键；重复调用直接返回当前用户，不重复扣。
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"""
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amount = round(float(amount or 0), 2)
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if amount <= 0:
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result = await db.execute(select(User).where(User.id == user_id).with_for_update().limit(1))
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user = result.scalar_one_or_none()
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if not user:
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raise ValueError("User not found")
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return user
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result = await db.execute(select(User).where(User.id == user_id).with_for_update().limit(1))
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user = result.scalar_one_or_none()
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if not user:
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raise ValueError("User not found")
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if biz_key:
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existing = await _get_existing_credit_record_by_biz_key(db, user_id=user_id, biz_key=biz_key)
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if existing:
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return user
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if float(user.credits or 0) < amount:
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raise InsufficientCreditsError()
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user.credits = round(float(user.credits or 0) - amount, 2)
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meta_kwargs = {}
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if record_meta:
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if isinstance(record_meta, CreditRecordMeta):
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record_meta = await with_user_snapshot(db, record_meta, user_id)
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meta_kwargs = record_meta.to_record_kwargs()
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elif isinstance(record_meta, dict):
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meta_kwargs = {k: v for k, v in record_meta.items() if v is not None}
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record = CreditRecord(
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id=generate_id(),
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user_id=user_id,
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type="consume",
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amount=-amount,
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balance_after=user.credits,
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description=description,
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related_id=related_id,
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biz_key=biz_key,
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refund_for_biz_key=refund_for_biz_key,
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**meta_kwargs,
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)
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db.add(record)
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await db.flush()
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return user
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async def add_credits(
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db: AsyncSession,
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user_id: str,
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amount: float,
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description: str,
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related_id: str | None = None,
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*,
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record_type: str = "recharge",
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biz_key: str | None = None,
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refund_for_biz_key: str | None = None,
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record_meta: CreditRecordMeta | dict | None = None,
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) -> User:
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"""增加用户积分，并写入流水。
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record_type 默认保持原来的 recharge；生成失败回退时传 refund。
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biz_key 不为空时幂等，重复调用不会重复加积分。
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"""
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amount = round(float(amount or 0), 2)
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result = await db.execute(select(User).where(User.id == user_id).with_for_update().limit(1))
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user = result.scalar_one_or_none()
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if not user:
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raise ValueError("User not found")
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if biz_key:
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existing = await _get_existing_credit_record_by_biz_key(db, user_id=user_id, biz_key=biz_key)
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if existing:
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return user
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if amount <= 0:
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return user
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user.credits = round(float(user.credits or 0) + amount, 2)
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meta_kwargs = {}
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if record_meta:
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if isinstance(record_meta, CreditRecordMeta):
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record_meta = await with_user_snapshot(db, record_meta, user_id)
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meta_kwargs = record_meta.to_record_kwargs()
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elif isinstance(record_meta, dict):
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meta_kwargs = {k: v for k, v in record_meta.items() if v is not None}
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record = CreditRecord(
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id=generate_id(),
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user_id=user_id,
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type=record_type,
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amount=amount,
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balance_after=user.credits,
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description=description,
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related_id=related_id,
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biz_key=biz_key,
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refund_for_biz_key=refund_for_biz_key,
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**meta_kwargs,
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)
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db.add(record)
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await db.flush()
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return user
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async def refund_credits(
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db: AsyncSession,
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user_id: str,
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amount: float,
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description: str,
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related_id: str | None = None,
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*,
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biz_key: str | None = None,
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refund_for_biz_key: str | None = None,
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record_meta: CreditRecordMeta | dict | None = None,
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) -> User:
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"""生成失败积分回退。"""
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return await add_credits(
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db,
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user_id=user_id,
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amount=amount,
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description=description,
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related_id=related_id,
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record_type="refund",
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biz_key=biz_key,
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refund_for_biz_key=refund_for_biz_key,
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record_meta=record_meta,
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)
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async def get_records(db: AsyncSession, user_id: str, page: int = 1, page_size: int = 20) -> tuple[list[CreditRecord], int]:
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count_query = select(func.count(CreditRecord.id)).where(CreditRecord.user_id == user_id)
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total = (await db.execute(count_query)).scalar() or 0
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result = await db.execute(
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select(CreditRecord)
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.where(CreditRecord.user_id == user_id)
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.order_by(CreditRecord.created_at.desc())
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.offset((page - 1) * page_size)
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.limit(page_size)
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)
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return list(result.scalars().all()), total
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