feat: implement email sending functionality via Resend service

app/api/config/email-service/route.ts

@@ -0,0 +1,99 @@
+import { NextResponse } from "next/server"
+import { getRequestContext } from "@cloudflare/next-on-pages"
+import { checkPermission } from "@/lib/auth"
+import { PERMISSIONS } from "@/lib/permissions"
+import { EMAIL_CONFIG } from "@/config"
+
+export const runtime = "edge"
+
+interface EmailServiceConfig {
+  enabled: boolean
+  apiKey: string
+  roleLimits: {
+    duke?: number
+    knight?: number
+  }
+}
+
+export async function GET() {
+  const canAccess = await checkPermission(PERMISSIONS.MANAGE_CONFIG)
+
+  if (!canAccess) {
+    return NextResponse.json({
+      error: "权限不足"
+    }, { status: 403 })
+  }
+
+  try {
+    const env = getRequestContext().env
+    const [enabled, apiKey, roleLimits] = await Promise.all([
+      env.SITE_CONFIG.get("EMAIL_SERVICE_ENABLED"),
+      env.SITE_CONFIG.get("RESEND_API_KEY"),
+      env.SITE_CONFIG.get("EMAIL_ROLE_LIMITS")
+    ])
+
+    const customLimits = roleLimits ? JSON.parse(roleLimits) : {}
+    
+    const finalLimits = {
+      duke: customLimits.duke !== undefined ? customLimits.duke : EMAIL_CONFIG.DEFAULT_DAILY_SEND_LIMITS.duke,
+      knight: customLimits.knight !== undefined ? customLimits.knight : EMAIL_CONFIG.DEFAULT_DAILY_SEND_LIMITS.knight,
+    }
+
+    return NextResponse.json({
+      enabled: enabled === "true",
+      apiKey: apiKey || "",
+      roleLimits: finalLimits
+    })
+  } catch (error) {
+    console.error("Failed to get email service config:", error)
+    return NextResponse.json(
+      { error: "获取 Resend 发件服务配置失败" },
+      { status: 500 }
+    )
+  }
+}
+
+export async function POST(request: Request) {
+  const canAccess = await checkPermission(PERMISSIONS.MANAGE_CONFIG)
+
+  if (!canAccess) {
+    return NextResponse.json({
+      error: "权限不足"
+    }, { status: 403 })
+  }
+
+  try {
+    const config = await request.json() as EmailServiceConfig
+
+    if (config.enabled && !config.apiKey) {
+      return NextResponse.json(
+        { error: "启用 Resend 时，API Key 为必填项" },
+        { status: 400 }
+      )
+    }
+
+    const env = getRequestContext().env
+    
+    const customLimits: { duke?: number; knight?: number } = {}
+    if (config.roleLimits?.duke !== undefined) {
+      customLimits.duke = config.roleLimits.duke
+    }
+    if (config.roleLimits?.knight !== undefined) {
+      customLimits.knight = config.roleLimits.knight
+    }
+
+    await Promise.all([
+      env.SITE_CONFIG.put("EMAIL_SERVICE_ENABLED", config.enabled.toString()),
+      env.SITE_CONFIG.put("RESEND_API_KEY", config.apiKey),
+      env.SITE_CONFIG.put("EMAIL_ROLE_LIMITS", JSON.stringify(customLimits))
+    ])
+
+    return NextResponse.json({ success: true })
+  } catch (error) {
+    console.error("Failed to save email service config:", error)
+    return NextResponse.json(
+      { error: "保存 Resend 发件服务配置失败" },
+      { status: 500 }
+    )
+  }
+}