feat: add WeChat sharing and invite flow

suixinkan/Core/WeChat/WeChatShareService.swift

@@ -0,0 +1,115 @@
+//
+//  WeChatShareService.swift
+//  suixinkan
+//
+
+import UIKit
+import WechatOpenSDK
+
+/// 微信分享服务，封装文本、网页和图片分享能力，不包含微信支付。
+enum WeChatShareService {
+    /// 当前设备是否已安装微信且支持 Open SDK。
+    static var isWeChatAvailable: Bool {
+        WXApi.isWXAppInstalled() && WXApi.isWXAppSupport()
+    }
+
+    /// 分享纯文本到微信。
+    @MainActor
+    static func shareText(
+        _ payload: WeChatTextSharePayload,
+        scene: WeChatShareScene,
+        completion: ((WeChatShareResult) -> Void)? = nil
+    ) {
+        let trimmed = payload.text.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !trimmed.isEmpty else {
+            completion?(.invalidPayload("分享文本不能为空"))
+            return
+        }
+
+        let request = SendMessageToWXReq()
+        request.bText = true
+        request.text = trimmed
+        request.scene = scene.wxSceneValue
+        WeChatManager.shared.sendShareRequest(request, completion: completion)
+    }
+
+    /// 分享网页链接到微信。
+    @MainActor
+    static func shareWebPage(
+        _ payload: WeChatWebPageSharePayload,
+        scene: WeChatShareScene,
+        thumbImage: UIImage? = nil,
+        completion: ((WeChatShareResult) -> Void)? = nil
+    ) {
+        let title = payload.title.trimmingCharacters(in: .whitespacesAndNewlines)
+        let url = payload.url.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !title.isEmpty else {
+            completion?(.invalidPayload("分享标题不能为空"))
+            return
+        }
+        guard !url.isEmpty else {
+            completion?(.invalidPayload("分享链接不能为空"))
+            return
+        }
+
+        let webpageObject = WXWebpageObject()
+        webpageObject.webpageUrl = url
+
+        let message = WXMediaMessage()
+        message.title = title
+        message.description = payload.description
+        message.mediaObject = webpageObject
+        if let thumbImage, let thumbData = WeChatThumbImageProcessor.makeThumbData(from: thumbImage) {
+            message.thumbData = thumbData
+        }
+
+        let request = SendMessageToWXReq()
+        request.bText = false
+        request.message = message
+        request.scene = scene.wxSceneValue
+        WeChatManager.shared.sendShareRequest(request, completion: completion)
+    }
+
+    /// 分享图片到微信。
+    @MainActor
+    static func shareImage(
+        _ payload: WeChatImageSharePayload,
+        scene: WeChatShareScene,
+        thumbImage: UIImage? = nil,
+        completion: ((WeChatShareResult) -> Void)? = nil
+    ) {
+        guard !payload.imageData.isEmpty else {
+            completion?(.invalidPayload("分享图片不能为空"))
+            return
+        }
+
+        let imageObject = WXImageObject()
+        imageObject.imageData = payload.imageData
+
+        let message = WXMediaMessage()
+        message.mediaObject = imageObject
+        if let thumbImage, let thumbData = WeChatThumbImageProcessor.makeThumbData(from: thumbImage) {
+            message.thumbData = thumbData
+        } else if let image = UIImage(data: payload.imageData),
+                  let thumbData = WeChatThumbImageProcessor.makeThumbData(from: image) {
+            message.thumbData = thumbData
+        }
+
+        let request = SendMessageToWXReq()
+        request.bText = false
+        request.message = message
+        request.scene = scene.wxSceneValue
+        WeChatManager.shared.sendShareRequest(request, completion: completion)
+    }
+
+    /// 读取 App 图标，用作微信分享缩略图兜底。
+    static func defaultThumbImage() -> UIImage? {
+        guard let icons = Bundle.main.infoDictionary?["CFBundleIcons"] as? [String: Any],
+              let primary = icons["CFBundlePrimaryIcon"] as? [String: Any],
+              let iconFiles = primary["CFBundleIconFiles"] as? [String],
+              let iconName = iconFiles.last else {
+            return nil
+        }
+        return UIImage(named: iconName)
+    }
+}