支付系统核心：配额限制与用户付费状态管理

- 添加 tokio 依赖用于异步测试
- 启用 User 结构体，添加 is_paid/is_admin/paid_expires_at 字段
- 添加 UpdatePaymentRequest 请求体
- insert_weather_data 集成配额检查逻辑
- 新增 get_user_by_id、count_user_weather_data、update_user_payment_status
- 添加 payment_fields 数据库迁移脚本

Cargo.lock

@@ -2079,6 +2079,7 @@ dependencies = [
  "serde",
  "serde_json",
  "sqlx",
+ "tokio",
 ]
 
 [[package]]
@@ -2718,9 +2719,21 @@ dependencies = [
  "signal-hook-registry",
  "slab",
  "socket2 0.6.0",
+ "tokio-macros",
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "tokio-macros"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e06d43f1345a3bcd39f6a56dbb7dcab2ba47e68e8ac134855e7e2bdbaf8cab8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "tokio-native-tls"
 version = "0.3.1"

Cargo.toml

@@ -18,3 +18,7 @@ reqwest = { version = "0.12.23", features=["json"]}
 serde = { version = "1.0.219", features = ["derive"] }
 serde_json = "1.0.143"
 sqlx = { version = "0.8.6", features = ["runtime-tokio-rustls", "postgres", "chrono", "uuid"] }
+tokio = { version = "1", features = ["full"] }
+
+[dev-dependencies]
+tokio = { version = "1", features = ["full"] }

migrations/001_add_payment_fields.sql

@@ -0,0 +1,3 @@
+ALTER TABLE users ADD COLUMN IF NOT EXISTS is_paid BOOLEAN NOT NULL DEFAULT false;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS is_admin BOOLEAN NOT NULL DEFAULT false;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS paid_expires_at TIMESTAMPTZ DEFAULT NULL;

src/db.rs

@@ -1,28 +1,30 @@
 use sqlx::{PgPool, postgres::PgPoolOptions};
 use std::env;
 use std::error::Error;
+use chrono::Utc;
 
 // 从 models 模块引入 WeatherData 结构体
-use crate::models::{WeatherData, WeatherDataBrief, WeatherListResponse};
+use crate::models::{User, WeatherData, WeatherDataBrief, WeatherListResponse};
 
 // 用于插入weather_data的数据
-pub async fn insert_weather_data(pool: &PgPool, weather_data: &WeatherData) -> Result<i32, String> {
-    // 1. 根据 openid 查询 user_id (这部分逻辑不变)
-    let user_id = match sqlx::query_as::<_, (i32,)>("SELECT id FROM users WHERE openid = $1")
-        .bind(&weather_data.openid)
-        .fetch_optional(pool)
-        .await
-    {
-        Ok(Some((id,))) => id,
-        Ok(None) => {
-            return Err(format!("未找到openid为 {} 的用户", weather_data.openid));
-        }
-        Err(e) => {
-            return Err(format!("查询用户失败: {}", e));
-        }
-    };
+pub async fn insert_weather_data(pool: &PgPool, weather_data: &WeatherData, user_id: i32) -> Result<i32, String> {
+    // 配额检查：非付费用户数据条数限制
+    let user = get_user_by_id(pool, user_id).await?;
+    let is_paid_active = user.is_paid && (user.paid_expires_at.is_none() || user.paid_expires_at.unwrap() > Utc::now());
     
-    // 2. 准备插入数据的 SQL 语句 (SQL本身不变)
+    if !is_paid_active {
+        let current_count = count_user_weather_data(pool, user_id).await?;
+        let limit: i64 = env::var("FREE_USER_DATA_LIMIT")
+            .unwrap_or_else(|_| "20".to_string())
+            .parse()
+            .unwrap_or(20);
+        
+        if current_count >= limit {
+            return Err("数据条数已达上限，请升级为付费用户".to_string());
+        }
+    }
+
+    // 准备插入数据的 SQL 语句
     let insert_query = r#"
         INSERT INTO weather_data (
             user_id, title, date, hour, min, longitude, latitude, daysincejanfirst,
@@ -242,3 +244,68 @@ pub async fn delete_weather_data(
         Err(e) => Err(format!("删除天气数据失败: {}", e)),
     }
 }
+
+// 根据用户ID获取用户信息
+pub async fn get_user_by_id(pool: &PgPool, user_id: i32) -> Result<User, String> {
+    let query = r#"
+        SELECT 
+            id, name, openid, phone, type, desc, is_paid, is_admin, paid_expires_at
+        FROM users
+        WHERE id = $1
+    "#;
+
+    let row = match sqlx::query_as::<_, User>(query)
+        .bind(user_id)
+        .fetch_optional(pool)
+        .await
+    {
+        Ok(Some(row)) => row,
+        Ok(None) => return Err(format!("未找到ID为 {} 的用户", user_id)),
+        Err(e) => return Err(format!("查询用户信息失败: {}", e)),
+    };
+
+    Ok(row)
+}
+
+// 统计用户的天气数据条数
+pub async fn count_user_weather_data(pool: &PgPool, user_id: i32) -> Result<i64, String> {
+    let query = r#"
+        SELECT COUNT(*) FROM weather_data WHERE user_id = $1
+    "#;
+
+    let count = match sqlx::query_as::<_, (i64,)>(query)
+        .bind(user_id)
+        .fetch_one(pool)
+        .await
+    {
+        Ok((count,)) => count,
+        Err(e) => return Err(format!("查询天气数据条数失败: {}", e)),
+    };
+
+    Ok(count)
+}
+
+// 更新用户付费状态
+pub async fn update_user_payment_status(
+    pool: &PgPool,
+    user_id: i32,
+    is_paid: bool,
+    paid_expires_at: Option<chrono::DateTime<chrono::Utc>>,
+) -> Result<(), String> {
+    let query = r#"
+        UPDATE users 
+        SET is_paid = $1, paid_expires_at = $2 
+        WHERE id = $3
+    "#;
+
+    match sqlx::query(query)
+        .bind(is_paid)
+        .bind(paid_expires_at)
+        .bind(user_id)
+        .execute(pool)
+        .await
+    {
+        Ok(_) => Ok(()),
+        Err(e) => Err(format!("更新用户付费状态失败: {}", e)),
+    }
+}

src/models.rs

@@ -272,8 +272,7 @@ pub struct WeatherData {
     pub wind_speed_suitability: String,
 }
 
-/*
-#[derive(Debug, Serialize, FromRow)]
+#[derive(Debug, Serialize, Deserialize, FromRow)]
 pub struct User {
     pub id: i32,
     #[serde(rename = "name")]
@@ -289,5 +288,17 @@ pub struct User {
     #[serde(rename = "desc")]
     #[sqlx(rename = "desc")]
     pub description: Option<String>,
+    #[sqlx(rename = "is_paid")]
+    pub is_paid: bool,
+    #[sqlx(rename = "is_admin")]
+    pub is_admin: bool,
+    #[sqlx(rename = "paid_expires_at")]
+    pub paid_expires_at: Option<chrono::DateTime<chrono::Utc>>,
+}
+
+// 管理员更新用户付费状态的请求体
+#[derive(Debug, Deserialize)]
+pub struct UpdatePaymentRequest {
+    pub is_paid: bool,
+    pub paid_expires_at: Option<String>, // ISO 8601 格式
 }
-*/