monety

Author: vinogradov

task1.js

@@ -0,0 +1,102 @@
+'use strict';
+
+const request = require('request-promise-native');
+const mongo = require('mongodb');
+
+const constants = require('./common').constants;
+const SUCCESSFUL_EXIT_CODE = 0;
+
+let DB;
+
+async function connect() {
+    return mongo.connect(constants.CONNECTION_STRING);
+}
+
+let reg = '';
+
+for (let year = 1000; year <= 2017; ++year) {
+    reg += year;
+    if (year !== 2017) {
+        reg += '|';
+    }
+}
+
+let hasYears = 0;
+let issuedBefore2000 = 0;
+
+function count(item) {
+    let itemText = item.title;
+
+    if (item.advertisementBody) {
+        itemText += item.advertisementBody;
+    }
+
+    const res = (new RegExp(reg)).exec(itemText);
+
+    if (res) {
+        hasYears++;
+
+        if (res[0] < 2000) {
+            issuedBefore2000++;
+        }
+        
+    } else if (/[\d]{2,3}[\s]*-[\s]*[\d]{2,3}[\s]*\u0433/.test(itemText)) {
+        hasYears++;
+        issuedBefore2000++;
+    }
+}
+
+async function main(db) {
+    const task1Collection = db.collection(constants.MAIN_COLLECTION_NAME);
+    const cursor = await task1Collection.find({is_expired: false});
+
+    let item;
+    while ((item = await cursor.next()) !== null) {
+        count(item);
+    }
+
+    console.log(hasYears);
+    console.log(issuedBefore2000);
+}
+
+function gracefulExit() {
+    function exit(error) {
+        console.log(`Exited gracefully. Errors: ${error}`);
+        process.exit(SUCCESSFUL_EXIT_CODE);
+    }
+
+    if (DB) {
+        console.log('Try to close DB connection');
+        DB.close().then(() => {
+            console.log('Connection is closed');
+            exit();
+        });
+    } else {
+        exit();
+    }
+
+}
+
+
+(async() => {
+    try {
+        DB = await connect();
+        console.log('mongo connected');
+        await main(DB);
+        await DB.close();
+    } catch (error) {
+        console.log(error);
+        gracefulExit();
+    }
+})();
+
+
+process
+    .on('SIGINT', () => {
+        console.log('Got SIGINT. Try to exit gracefully');
+        gracefulExit();
+    })
+    .on('SIGTERM', () => {
+        console.log('Got SIGTERM. Try to exit gracefully');
+        gracefulExit();
+    });