短报文教学

app/service/teaching.js

@@ -0,0 +1,100 @@
+'use strict';
+
+const BaseService = require('../core/base_service.js');
+
+const fileName = "teaching";
+
+class TeachingService extends BaseService {
+  // 获取最近发送的一条信息
+  async getMsg(redis, token) {
+    const { ctx } = this;
+    try {
+      const verifyResult = await this.Verify(redis, token);
+      let result = { code: verifyResult };
+      if (verifyResult == 401) {
+        const where = { token };
+        const attributes = ['token'];
+        const dbResult = await ctx.model.BuserToken.findOne({ attributes, where });
+        result.code = dbResult ? dbResult.dataValus.user_uid : 401;
+      }
+      if (result.code !== 401 && result.code !== 403) {
+        const uidLastCode = this.shunt(result.code);
+        const model = {
+            "B": ctx.model.BShortMsg,
+            "C": ctx.model2.CShortMsg
+        };
+        const attributes = ['card_id', 'encode_type', 'msg_data', 'created_at'];
+        const where = { user_uid: result.code };
+        const limit = 1;
+        const order = [['created_at', 'DESC']];
+        const dbOptions = { attributes, limit, order, where };
+        const dbResult = await model[uidLastCode].findOne(dbOptions);
+        if (dbResult) {
+          result.userData = dbResult.dataValues;
+          result.code = 200;
+        } else {
+          result.code = false;
+        }
+      }
+      return result.code ? result : false;
+    } catch (error) {
+      const blockName = fileName + "--" + "getMsg";
+      ctx.app.middleware.log('../../serviceLog', blockName + ">>>>" + error);
+      return 'error';
+    }
+  }
+
+  // 获取若干条历史消息
+  async getHistory(redis, token, limit, offset) {
+    const { ctx } = this;
+    try {
+      const verifyResult = await this.Verify(redis, token);
+      let result = { code: verifyResult };
+      if (verifyResult == 401) {
+        const where = { token };
+        const attributes = ['token'];
+        const dbResult = await ctx.model.BuserToken.findOne({ attributes, where });
+        result.code = dbResult ? dbResult.dataValus.user_uid : 401;
+      }
+      if (result.code !== 401 && result.code !== 403) {
+        const uidLastCode = this.shunt(result.code);
+        const model = {
+            "B": ctx.model.BShortMsg,
+            "C": ctx.model2.CShortMsg
+        };
+        const attributes = ['card_id', 'encode_type', 'msg_data', 'created_at'];
+        const where = { user_uid: result.code };
+        const order = [['created_at', 'DESC']];
+        if (limit == undefined || !this.isAllDigits(limit)) {
+          limit = 10
+        } else {
+          limit = parseInt(limit);
+        }
+        if (offset == undefined || !this.isAllDigits(offset)) {
+          offset = 1
+        } else {
+          offset = parseInt(offset);
+        }
+        offset = (offset - 1) * limit;
+        const dbOptions = { attributes, limit, offset, order, where };
+        const dbResult = await model[uidLastCode].findAndCountAll(dbOptions);
+        if (dbResult.rows.length !== 0) {
+          result.userData = {
+            rows: dbResult.rows,
+            count: dbResult.count
+          };
+          result.code = 200;
+        } else {
+          result.code = false;
+        }
+      }
+      return result.code ? result : false;
+    } catch (error) {
+      const blockName = fileName + "--" + "getHistory";
+      ctx.app.middleware.log('../../serviceLog', blockName + ">>>>" + error);
+      return 'error';
+    }
+  }
+}
+
+module.exports = TeachingService;