add method to find search requests for real estate

app/helpers/db/searchRequest.js

@@ -1,5 +1,7 @@
 "use strict";
 const db = require("../../models/index");
+const sequelize = require("sequelize");
+const Op = sequelize.Op;
 
 const getSearchRequest = async searchRequestId => {
   return await db.SearchRequest.findByPk(searchRequestId);
@@ -9,7 +11,56 @@ const createSearchRequest = async (searchRequestFields = {}) => {
   return await db.SearchRequest.create(searchRequestFields);
 };
 
+const findSearchRequestsForRealEstate = async realEstate => {
+  const {
+    price,
+    area,
+    adType,
+    realEstateType,
+    locationLat,
+    locationLong
+  } = realEstate;
+
+  const stGeometry = sequelize.fn(
+    "ST_GEOMFROMTEXT",
+    `POINT (${locationLong} ${locationLat})`,
+    4326
+  );
+  const areaToSearchColumn = sequelize.col("areaToSearch");
+  const contains = sequelize.fn("ST_Contains", areaToSearchColumn, stGeometry);
+
+  const geoSearchQueryPart = sequelize.where(contains, true);
+
+  const query = {
+    adType,
+    realEstateType,
+    subscribed: true,
+    [Op.and]: geoSearchQueryPart
+  };
+
+  if (price) {
+    query.priceMin = {
+      [Op.lte]: price
+    };
+    query.priceMax = {
+      [Op.gte]: price
+    };
+  }
+
+  if (area) {
+    query.sizeMin = {
+      [Op.lte]: area
+    };
+    query.sizeMax = {
+      [Op.gte]: area
+    };
+  }
+
+  return await db.SearchRequest.findAll({ where: query });
+};
+
 module.exports = {
   getSearchRequest,
-  createSearchRequest
+  createSearchRequest,
+  findSearchRequestsForRealEstate
 };