feat(患者绑定): 添加药师换绑逻辑防止重复绑定

新增hasBindPharmacist标志位防止重复换绑
重构扫码项目处理逻辑，分离为showCurrentProject和handleBoundProject方法
添加switchProjectAndBind方法处理项目切换和绑定流程

src/pages/index/index.ts

@@ -34,6 +34,9 @@ Page({
     nickname: '',
   },
 
+  // 是否已经换绑，防止死循环
+  hasBindPharmacist: false,
+
   onLoad() {
     const app = getApp<IAppOption>()
 
@@ -107,64 +110,161 @@ Page({
           currentProjectId,
         })
 
-        if (projectList.length > 0) {
-          // 找到当前项目
-          const currentProject = projectList.find((p: any) => p.projectId === currentProjectId) || projectList[0]
-
-          // 检查扫码的项目是否在已绑定项目列表中
-          const scanProjectId = this.data.projectId
-          if (scanProjectId) {
-            const scanProject = projectList.find((p: any) => String(p.projectId) === String(scanProjectId))
-            if (scanProject) {
-              // 扫码的项目已绑定，切换到该项目
-              if (String(scanProjectId) !== String(currentProjectId)) {
-                this.switchProject(scanProjectId)
-              } else {
-                // 已经是当前项目，直接显示
-                this.setData({
-                  isPatient: 1,
-                  projectId: currentProject.projectId,
-                  projectName: currentProject.projectName,
-                  currentProjectName: currentProject.projectName,
-                  hasProject: true,
-                  selectedIndicationName: currentProject.indicationName,
-                })
-              }
-            } else {
-              // 扫码的项目未绑定，进入选择流程（需要绑定新项目）
-              this.setData({
-                hasProject: false,
-              })
-              this.getProjectInfo()
-            }
-          } else {
-            // 没有扫码，显示当前项目
-            this.setData({
-              isPatient: 1,
-              projectId: currentProject.projectId,
-              projectName: currentProject.projectName,
-              currentProjectName: currentProject.projectName,
-              hasProject: true,
-              selectedIndicationName: currentProject.indicationName,
-            })
-          }
-        } else {
-          // 没有绑定任何项目，获取项目列表供选择
-          this.setData({
-            hasProject: false,
-          })
+        // 没有绑定任何项目，进入选择流程
+        if (projectList.length === 0) {
+          this.setData({ hasProject: false })
           this.getProjectInfo()
+          return
+        }
+
+        // 找到当前项目
+        const currentProject = projectList.find((p: any) => p.projectId === currentProjectId) || projectList[0]
+        const scanProjectId = this.data.projectId
+        const scanPharmacistId = this.data.pharmacistId
+
+        // 没有扫码，直接显示当前项目
+        if (!scanProjectId) {
+          this.showCurrentProject(currentProject)
+          return
         }
+
+        // 查找扫码的项目
+        const scanProject = projectList.find((p: any) => String(p.projectId) === String(scanProjectId))
+
+        // 扫码的项目未绑定，进入选择流程
+        if (!scanProject) {
+          this.setData({ hasProject: false })
+          this.getProjectInfo()
+          return
+        }
+
+        // 扫码的项目已绑定，处理换绑逻辑
+        this.handleBoundProject(scanProjectId, scanPharmacistId, scanProject, currentProjectId, currentProject)
       })
       .catch(() => {
         // 接口失败，获取项目列表
-        this.setData({
-          hasProject: false,
-        })
+        this.setData({ hasProject: false })
         this.getProjectInfo()
       })
   },
 
+  // 显示当前项目
+  showCurrentProject(currentProject: any) {
+    this.setData({
+      isPatient: 1,
+      projectId: currentProject.projectId,
+      projectName: currentProject.projectName,
+      currentProjectName: currentProject.projectName,
+      hasProject: true,
+      selectedIndicationName: currentProject.indicationName,
+    })
+  },
+
+  // 处理已绑定的扫码项目
+  handleBoundProject(
+    scanProjectId: string,
+    scanPharmacistId: string,
+    scanProject: any,
+    currentProjectId: number,
+    currentProject: any
+  ) {
+    const isDifferentProject = String(scanProjectId) !== String(currentProjectId)
+    const needBind = scanPharmacistId && !this.hasBindPharmacist
+
+    // 需要换绑
+    if (needBind) {
+      if (isDifferentProject) {
+        // 当前项目与扫码项目不一致，先切换项目再绑定
+        this.switchProjectAndBind(scanProjectId, scanPharmacistId, scanProject.indicationId)
+      } else {
+        // 已经是当前项目，直接进行绑定
+        this.bindPharmacist(scanProjectId, scanPharmacistId, scanProject.indicationId)
+      }
+      return
+    }
+
+    // 只是切换项目
+    if (isDifferentProject) {
+      this.switchProject(scanProjectId)
+      return
+    }
+
+    // 已经是当前项目，直接显示
+    this.showCurrentProject(currentProject)
+  },
+
+  // 换绑（建立新的绑定关系）
+  bindPharmacist(projectId: string, pharmacistId: string, indicationId: number) {
+    // 设置标记，防止重复换绑
+    this.hasBindPharmacist = true
+    wx.ajax({
+      method: 'POST',
+      url: '/app/patient/patient/bind-pharmacist',
+      data: {
+        projectId: Number(projectId),
+        pharmacistId: Number(pharmacistId),
+        indicationId,
+      },
+    })
+      .then(() => {
+        wx.showToast({
+          title: '换绑成功',
+          icon: 'success',
+        })
+        // 刷新页面数据
+        this.checkStatus()
+      })
+      .catch(() => {
+        wx.showToast({
+          title: '换绑失败',
+          icon: 'none',
+        })
+        // 刷新页面数据
+        this.checkStatus()
+      })
+  },
+
+  // 切换项目并绑定
+  switchProjectAndBind(projectId: string, pharmacistId: string, indicationId: number) {
+    // 设置标记，防止重复换绑
+    this.hasBindPharmacist = true
+    wx.ajax({
+      method: 'POST',
+      url: '/app/patient/patient/switch-project',
+      data: {
+        projectId,
+      },
+    })
+      .then(() => {
+        // 切换成功后进行绑定
+        return wx.ajax({
+          method: 'POST',
+          url: '/app/patient/patient/bind-pharmacist',
+          data: {
+            projectId: Number(projectId),
+            pharmacistId: Number(pharmacistId),
+            indicationId,
+          },
+        })
+      })
+      .then(() => {
+        wx.showToast({
+          title: '换绑成功',
+          icon: 'success',
+        })
+        // 刷新页面数据
+        this.checkStatus()
+      })
+      .catch(() => {
+        wx.showToast({
+          title: '操作失败',
+          icon: 'none',
+        })
+        // 刷新页面数据
+        this.checkStatus()
+      })
+  },
+
   // 切换项目
   switchProject(projectId: string) {
     wx.ajax({