find matching real estates for new search request and notify

app/config/appConfig.js

@@ -25,6 +25,8 @@ const AWS_EMAIL_CONFIG = {
 
 const MAX_REAL_ESTATES_IN_EMAIL =
   parseInt(process.env.MAX_REAL_ESTATES_IN_EMAIL) || 10;
+const MAX_REAL_ESTATES_IN_FIRST_EMAIL =
+  parseInt(process.env.MAX_REAL_ESTATES_IN_FIRST_EMAIL) || 5;
 
 module.exports = {
   APP_PORT,
@@ -33,5 +35,6 @@ module.exports = {
   CRAWLER_INTERVAL,
   STOP_CRAWLER,
   AWS_EMAIL_CONFIG,
-  MAX_REAL_ESTATES_IN_EMAIL
+  MAX_REAL_ESTATES_IN_EMAIL,
+  MAX_REAL_ESTATES_IN_FIRST_EMAIL
 };

app/helpers/db/realEstate.js

@@ -1,5 +1,7 @@
 "use strict";
 const db = require("../../models/index");
+const sequelize = require("sequelize");
+const Op = sequelize.Op;
 
 const bulkUpsertRealEstates = async realEstateData => {
   try {
@@ -26,10 +28,12 @@ const bulkUpsertRealEstates = async realEstateData => {
       "updatedAt",
       "renewedDate"
     ];
+    const order = [["updatedAt", "desc"]];
 
     return await db.RealEstate.bulkCreate(realEstateData, {
       updateOnDuplicate: fieldsToUpdateIfDuplicate,
-      returning: true
+      returning: true,
+      order
     });
   } catch (e) {
     console.log("Error bulk upserting realEstates : ", e);
@@ -40,7 +44,68 @@ const getRealEstateById = async id => {
   return db.RealEstate.findByPk(id);
 };
 
+const findRealEstatesForSearchRequest = async (searchRequest, maxResults) => {
+  const {
+    priceMin,
+    priceMax,
+    sizeMin,
+    sizeMax,
+    adType,
+    realEstateType,
+    areaToSearch
+  } = searchRequest;
+
+  const longitudeColumn = sequelize.col("locationLong");
+  const latitudeColumn = sequelize.col("locationLat");
+
+  const pointGeometry = sequelize.fn(
+    "ST_Point",
+    longitudeColumn,
+    latitudeColumn
+  );
+  const pointWithSRID = sequelize.fn("ST_SetSRID", pointGeometry, 4326);
+  const areaToSearchAsGeometry = sequelize.fn(
+    "ST_GeomFromGeoJSON",
+    JSON.stringify(areaToSearch)
+  );
+  const areaToSearchWithSRID = sequelize.fn(
+    "ST_SetSRID",
+    areaToSearchAsGeometry,
+    4326
+  );
+  const contains = sequelize.fn(
+    "ST_Contains",
+    areaToSearchWithSRID,
+    pointWithSRID
+  );
+
+  const geoSearchQueryPart = sequelize.where(contains, true);
+
+  const query = {
+    adType,
+    realEstateType,
+    price: {
+      [Op.lte]: priceMax,
+      [Op.gte]: priceMin
+    },
+    area: {
+      [Op.lte]: sizeMax,
+      [Op.gte]: sizeMin
+    },
+    [Op.and]: geoSearchQueryPart
+  };
+
+  const order = [["updatedAt", "desc"]];
+
+  return await db.RealEstate.findAll({
+    where: query,
+    limit: maxResults,
+    order
+  });
+};
+
 module.exports = {
   bulkUpsertRealEstates,
-  getRealEstateById
+  getRealEstateById,
+  findRealEstatesForSearchRequest
 };

app/helpers/db/searchRequestMatch.js

@@ -6,11 +6,14 @@ const findRealEstatesForSearchRequest = async searchRequestId => {
     searchRequestId
   };
 
-  const include = [{ model: db.RealEstate, as: "realEstates" }];
+  const realEstatesModel = { model: db.RealEstate, as: "realEstates" };
+  const order = [[realEstatesModel, "updatedAt", "desc"]];
+  const include = [realEstatesModel];
 
   const matches = await db.SearchRequestMatch.findAll({
     where: query,
-    include
+    include,
+    order
   });
 
   const matchingRealEstates = [];

app/helpers/emailContentGenerator.js

@@ -10,6 +10,16 @@ const generateEmailFooter = searchRequestId => {
      <strong>Vaš,<br/>Javimi tim</strong>`;
 };
 
+const generateRealEstateLinks = realEstates => {
+  let realEstateLinks = "";
+  for (const realEstate of realEstates) {
+    const { id: realEstateId, title } = realEstate;
+
+    realEstateLinks += `<li><a href="${APP_URL}/redirect/${realEstateId}">${title}</a></li>`;
+  }
+  return realEstateLinks;
+};
+
 const generateNotificationEmail = (realEstates, searchRequestId) => {
   const truncateList = realEstates.length > MAX_REAL_ESTATES_IN_EMAIL;
   const realEstatesToShow = truncateList
@@ -17,16 +27,8 @@ const generateNotificationEmail = (realEstates, searchRequestId) => {
     : realEstates;
 
   const allRealEstatesLink = `${APP_URL}/nekretnine/${searchRequestId}`;
-
-  let realEstateLinks = "";
-  for (const realEstate of realEstatesToShow) {
-    const { id: realEstateId, title } = realEstate;
-
-    realEstateLinks += `<li><a href="${APP_URL}/redirect/${realEstateId}">${title}</a></li><br />`;
-  }
-
+  const realEstateLinks = generateRealEstateLinks(realEstatesToShow);
   const moreRealEstates = `<div>Kompletan spisak nekretnina možete pegledati na <a href="${allRealEstatesLink}">listi nekretnina</a><div>`;
-
   const emailFooter = generateEmailFooter(searchRequestId);
 
   return `<h3>Zdravo</h3>
@@ -40,7 +42,7 @@ const generateNotificationEmail = (realEstates, searchRequestId) => {
   ${emailFooter}`;
 };
 
-const generateNewSearchRequestEmail = searchRequest => {
+const generateNewSearchRequestEmail = (searchRequest, matchingRealEstates) => {
   const realEstateType = AD_CATEGORY[searchRequest.realEstateType];
   const {
     id,
@@ -52,8 +54,15 @@ const generateNewSearchRequestEmail = searchRequest => {
     priceMax
   } = searchRequest;
 
+  const realEstateLinks = generateRealEstateLinks(matchingRealEstates);
+  const instantRealEstatesText = `<br/>
+       <div>
+        U međuvremenu pogledajte neke od nedavno objavljenih nekretnina koje odgovaraju Vašim uslovima pretrage :<br/>
+        ${realEstateLinks}
+       </div>`;
+
   const gardenSize = realEstateType.hasGardenSize
-    ? `<div><strong>Kvadratura okućnice: Od ${gardenSizeMin} do ${gardenSizeMax} m2  </strong></div>`
+    ? `<div><strong>Kvadratura okućnice: Od ${gardenSizeMin} do ${gardenSizeMax} m2</strong></div>`
     : ``;
 
   const emailFooter = generateEmailFooter(id);
@@ -68,6 +77,7 @@ const generateNewSearchRequestEmail = searchRequest => {
     ${gardenSize}
     <div><strong>Cijena:</strong> ${priceMin} do ${priceMax} KM</div>
   </div>
+  ${matchingRealEstates.length > 0 ? instantRealEstatesText : ""}
   <br/>
   ${emailFooter}`;
 };

app/services/notificationService.js

@@ -1,5 +1,8 @@
 "use strict";
-const { matchRealEstates } = require("../services/searchMatchService");
+const {
+  matchRealEstates,
+  matchSearchRequest
+} = require("../services/searchMatchService");
 const {
   generateNotificationEmail,
   generateNewSearchRequestEmail
@@ -8,6 +11,24 @@ const { sendEmail } = require("../services/emailService");
 
 const notifyForNewRealEstates = async newRealEstates => {
   const matches = await matchRealEstates(newRealEstates);
+  await notifyMatches(matches);
+};
+
+const notifyForNewSearchRequest = async searchRequest => {
+  const matches = await matchSearchRequest(searchRequest);
+
+  const searchRequestId = searchRequest.id;
+  const matchingRealEstates = matches[searchRequestId].realEstates;
+
+  const emailContent = generateNewSearchRequestEmail(
+    searchRequest,
+    matchingRealEstates
+  );
+  const { email } = searchRequest;
+  await sendEmail(email, "Market Alert", emailContent);
+};
+
+const notifyMatches = async matches => {
   const searchRequestsToNotify = Object.keys(matches);
 
   const asyncSendEmailActions = [];
@@ -27,12 +48,6 @@ const notifyForNewRealEstates = async newRealEstates => {
   await Promise.all(asyncSendEmailActions);
 };
 
-const notifyForNewSearchRequest = async searchRequest => {
-  const emailContent = generateNewSearchRequestEmail(searchRequest);
-  const { email } = searchRequest;
-  await sendEmail(email, "Market Alert", emailContent);
-};
-
 module.exports = {
   notifyForNewRealEstates,
   notifyForNewSearchRequest

app/services/searchMatchService.js

@@ -3,7 +3,9 @@
 const {
   findSearchRequestsForRealEstate
 } = require("../helpers/db/searchRequest");
+const { findRealEstatesForSearchRequest } = require("../helpers/db/realEstate");
 const { addMatches } = require("../helpers/db/searchRequestMatch");
+const { MAX_REAL_ESTATES_IN_FIRST_EMAIL } = require("../config/appConfig");
 
 const matchRealEstates = async realEstates => {
   if (Array.isArray(realEstates)) {
@@ -40,6 +42,35 @@ const matchRealEstates = async realEstates => {
   }
 };
 
-module.exports = {
-  matchRealEstates
+const matchSearchRequest = async searchRequest => {
+  const { id: searchRequestId } = searchRequest;
+
+  const realEstates = await findRealEstatesForSearchRequest(
+    searchRequest,
+    MAX_REAL_ESTATES_IN_FIRST_EMAIL
+  );
+  const matches = {
+    [searchRequestId]: {
+      searchRequest,
+      realEstates: []
+    }
+  };
+  const matchingRecords = [];
+
+  for (const realEstate of realEstates) {
+    matches[searchRequestId].realEstates.push(realEstate);
+    matchingRecords.push({
+      searchRequestId,
+      realEstateId: realEstate.id,
+      notified: false
+    });
+  }
+
+  await addMatches(matchingRecords);
+  return matches;
+};
+
+module.exports = {
+  matchRealEstates,
+  matchSearchRequest
 };

development.env

@@ -8,7 +8,8 @@ SEQUELIZE_LOGGING=0- no sequelize logging, 1- log to the console
 PORT=Port for the app, defaults to 5000
 APP_BASE_URL=base url for the app
 
-MAX_REAL_ESTATES_IN_EMAIL=Number of real estates that will be shown in URL, others will be truncated and URL with full list will be shwon
+MAX_REAL_ESTATES_IN_EMAIL=Max number of real estates that will be shown in email, others will be truncated and URL with full list will be shwon
+MAX_REAL_ESTATES_IN_FIRST_EMAIL=Max number of real estates that will be shown in first (welcome) email
 
 AWS_KEY_ID=(your-key-here)
 AWS_SECRET_ACCESS_KEY=(your-key-here)