bodyWeight/pages/searchDevice/searchDevice.js

const app = getApp();

Page({
    data: {
        initText: "",
        devicesList: [],
        searchDevicesList: true,
        isShowingModal: false, // 控制模态框是否正在显示
    },

    onLoad(options) {
        // 一次性数据初始化（蓝牙初始化在 onShow 中统一处理）
    },

    onShow() {
        this.checkBluetoothPermissionAndInit();
    },

    async checkBluetoothPermissionAndInit() {
        if (this.data.isShowingModal) {
            return;
        }

        this.setData({
            initText: "正在检查蓝牙及位置权限..."
        });

        try {
            const settingRes = await wx.getSetting();
            const hasBluetoothPermission = settingRes.authSetting['scope.bluetooth'];
            const hasLocationPermission = settingRes.authSetting['scope.userLocation'];

            if (hasBluetoothPermission && hasLocationPermission) {
                this.openBluetoothAdapter();
            } else {
                let scopeToRequest = [];
                let permissionNames = [];

                if (!hasBluetoothPermission) {
                    scopeToRequest.push('scope.bluetooth');
                    permissionNames.push('蓝牙');
                }
                if (!hasLocationPermission) {
                    scopeToRequest.push('scope.userLocation');
                    permissionNames.push('位置');
                }

                if (scopeToRequest.length > 0) {
                    try {
                        // 逐个授权所有缺失的权限
                        for (const scope of scopeToRequest) {
                            await wx.authorize({ scope });
                        }
                        this.openBluetoothAdapter();
                    } catch (authErr) {
                        if (this.data.isShowingModal) {
                            return;
                        }
                        this.setData({ 
                            isShowingModal: true 
                        });

                        wx.showModal({
                            title: '提示',
                            content: `小程序需要您的${permissionNames.join('和')}权限才能正常使用蓝牙功能。请前往手机设置开启。`,
                            confirmText: '去开启',
                            cancelText: '不开启',
                            success: (modalRes) => {
                                this.setData({ 
                                    isShowingModal: false 
                                });
                                if (modalRes.confirm) {
                                    wx.openSetting({
                                        success: (settingRes) => {
                                            this.checkBluetoothPermissionAndInit();
                                        },
                                        fail: (settingErr) => {
                                            wx.navigateBack({ 
                                                delta: 1 
                                            });
                                        }
                                    });
                                } else {
                                    this.setData({ 
                                        initText: "权限被拒绝。" 
                                    });
                                    wx.navigateBack({ 
                                        delta: 1 
                                    });
                                }
                            },
                            fail: () => {
                                this.setData({ 
                                    isShowingModal: false 
                                });
                            }
                        });
                    }
                }
            }
        } catch (err) {
            if (this.data.isShowingModal) {
                return;
            }
            this.setData({ 
                isShowingModal: true 
            });

            wx.showToast({
                title: '获取权限设置失败',
                icon: 'none',
                duration: 2000,
                success: () => {
                    this.setData({ 
                        isShowingModal: false 
                    });
                    wx.navigateBack({ 
                        delta: 1 
                    });
                },
                fail: () => {
                    this.setData({ 
                        isShowingModal: false 
                    });
                    wx.navigateBack({ 
                        delta: 1 
                    });
                }
            });
        }
    },

    async openBluetoothAdapter() {
        if (this.data.isShowingModal) {
            return;
        }

        this.setData({
            initText: "正在初始化蓝牙..."
        });
        
        try {
            await wx.openBluetoothAdapter();
            this.setData({
                initText: "蓝牙初始化成功"
            });
            this.getDeviceSettingList();
        } catch (err) {
            this.setData({
                initText: "蓝牙初始化失败。"
            });

            if (this.data.isShowingModal) {
                return;
            }
            this.setData({ 
                isShowingModal: true 
            });

            let modalContent = '';
            if (err.errCode === 10001) {
                modalContent = "请确保手机蓝牙已开启。";
            } else if (err.errMsg && (err.errMsg.includes('permission denied') || err.errCode === 10003)) {
                modalContent = '蓝牙或位置权限仍被拒绝，无法使用蓝牙功能。';
            } else {
                 wx.showToast({
                    title: `蓝牙适配器打开失败: ${err.errMsg || err.errCode}`,
                    icon: 'none',
                    duration: 2000,
                    success: () => {
                        this.setData({ 
                            isShowingModal: false 
                        });
                        wx.navigateBack({ 
                            delta: 1 
                        });
                    },
                    fail: () => {
                        this.setData({ 
                            isShowingModal: false 
                        });
                        wx.navigateBack({ 
                            delta: 1 
                        });
                    }
                });
                return;
            }

            wx.showModal({
                title: "提示",
                content: modalContent,
                showCancel: false,
                success: () => {
                    this.setData({ 
                        isShowingModal: false 
                    });
                    wx.navigateBack({ 
                        delta: 1 
                    });
                },
                fail: () => {
                    this.setData({ 
                        isShowingModal: false 
                    });
                }
            });
        }
    },

    getDeviceSettingList() {
        // app.globalData.ppScale.plugin.Blue.visibleLog(true);
        this.setData({
            initText: "设备搜索中..."
        });
        app.globalData.ppScale.device.list = [];
        let seviceList = app.globalData.ppScale.device.setting;
        app.globalData.ppScale.plugin.Blue.setDeviceSetting(seviceList);
        let deviceNames = seviceList.map(item => item.deviceName);
        app.globalData.ppScale.plugin.Blue.start(deviceNames, false); 
        app.globalData.ppScale.plugin.bus.subscribe("devicesList", (res) => {
            // console.log("searchDevice ===> devicesList", res);
            this.setData({
                devicesList: res
            });
            this.selectDevice();
        });
    },

    selectDevice() {
        if(this.data.devicesList && this.data.devicesList.length && this.data.searchDevicesList) {
            this.setData({
                searchDevicesList: false
            });
            setTimeout(() => {
                app.globalData.ppScale.plugin.Blue.stopBluetoothDevicesDiscovery();
                app.globalData.ppScale.device.list = this.data.devicesList;
                wx.redirectTo({
                    url: "/pages/configureDevice/configureDevice"
                })
            }, 1000);
        }
    },

    onUnload() {
        app.globalData.ppScale.plugin.Blue.stopBluetoothDevicesDiscovery();
        this.setData({
            isShowingModal: false
        });
    }
})