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...

9 Commits

Author SHA1 Message Date
Patrick
0a25edd58f
Merge branch 'develop' into BETTERZON-78 2021-05-20 10:24:21 +02:00
Patrick
e7543e6430
BETTERZON-107: Refactoring code with Proxy as design pattern (#49) 2021-05-20 10:23:41 +02:00
Patrick
ead1f10b25
BETTERZON-110: Refactoring, reformatting and commenting api service (#56) 2021-05-20 10:20:50 +02:00
Patrick
712f6c9034
BETTERZON-101: Adding service functions for pricealarms api (#55)
- Not properly tested though as login functionality is required to test but not yet implemented
2021-05-19 19:46:30 +02:00
Patrick
1581184b57
BETTERZON-96: Adding API endpoint for delisting a whole vendor (#54) 2021-05-19 09:08:52 +02:00
henningxtro
26ba21156a
BETTERZON-58 (#53)
* BETTERZON-58: Basic Functionality with scrapy

* Added independent crawler function, yielding price

* moved logic to amazon.py

* .

* moved scrapy files to unused folder

* Added basic amazon crawler using beautifulsoup4

* Connected Api to Crawler

* Fixed string concatenation for sql statement in getProductLinksForProduct

* BETTERZON-58: Fixing SQL insert

* BETTERZON-58: Adding access key verification

* BETTERZON-58: Fixing API endpoint of the crawler
- The list of products in the API request was treated like a string and henceforth, only the first product has been crawled

* Added another selector for price on amazon (does not work for books)

Co-authored-by: root <root@DESKTOP-ARBPL82.localdomain>
Co-authored-by: Patrick Müller <patrick@mueller-patrick.tech>
Co-authored-by: Patrick <50352812+Mueller-Patrick@users.noreply.github.com>
2021-05-19 00:46:14 +02:00
Patrick
3ae68b3df3
BETTERZON-95: Adding API endpoint for getting, inserting and updating contact persons (#52) 2021-05-18 21:14:00 +02:00
Patrick
8f17ae7896
BETTERZON-98: Adding API endpoint for adding price entries as a registered vendor manager (#51) 2021-05-18 00:40:24 +02:00
Patrick
16ed1070c2
BETTERZON-97: Adding API endpoint to get all products listed by a specific vendor (#50) 2021-05-18 00:24:00 +02:00
31 changed files with 868 additions and 203 deletions

View File

@ -15,6 +15,7 @@ import {errorHandler} from './middleware/error.middleware';
import {notFoundHandler} from './middleware/notFound.middleware';
import {usersRouter} from './models/users/users.router';
import {pricealarmsRouter} from './models/pricealarms/pricealarms.router';
import {contactpersonsRouter} from './models/contact_persons/contact_persons.router';
const cookieParser = require('cookie-parser');
@ -49,6 +50,7 @@ app.use('/prices', pricesRouter);
app.use('/users', usersRouter);
app.use('/vendors', vendorsRouter);
app.use('/pricealarms', pricealarmsRouter);
app.use('/contactpersons', contactpersonsRouter);
app.use(errorHandler);
app.use(notFoundHandler);

View File

@ -0,0 +1,9 @@
export interface Contact_Person {
contact_person_id: number;
first_name: string;
last_name: string;
gender: string;
email: string;
phone: string;
vendor_id: number;
}

View File

@ -0,0 +1,5 @@
import {Contact_Person} from './contact_person.interface';
export interface Contact_Persons {
[key: number]: Contact_Person;
}

View File

@ -0,0 +1,129 @@
/**
* Required External Modules and Interfaces
*/
import express, {Request, Response} from 'express';
import * as ContactPersonService from './contact_persons.service';
import {Contact_Person} from './contact_person.interface';
import {Contact_Persons} from './contact_persons.interface';
import * as UserService from '../users/users.service';
import * as PriceService from '../prices/prices.service';
/**
* Router Definition
*/
export const contactpersonsRouter = express.Router();
/**
* Controller Definitions
*/
// GET contactpersons/
contactpersonsRouter.get('/', async (req: Request, res: Response) => {
try {
const contacts: Contact_Persons = await ContactPersonService.findAll();
res.status(200).send(contacts);
} catch (e) {
console.log('Error handling a request: ' + e.message);
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});
// GET contactpersons/:id
contactpersonsRouter.get('/:id', async (req: Request, res: Response) => {
const id: number = parseInt(req.params.id, 10);
if (!id) {
res.status(400).send('Missing parameters.');
return;
}
try {
const contact: Contact_Person = await ContactPersonService.find(id);
res.status(200).send(contact);
} catch (e) {
console.log('Error handling a request: ' + e.message);
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});
// GET contactpersons/byvendor/:id
contactpersonsRouter.get('/byvendor/:id', async (req: Request, res: Response) => {
const id: number = parseInt(req.params.id, 10);
if (!id) {
res.status(400).send('Missing parameters.');
return;
}
try {
const contacts: Contact_Persons = await ContactPersonService.findByVendor(id);
res.status(200).send(contacts);
} catch (e) {
console.log('Error handling a request: ' + e.message);
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});
// POST contactpersons/
contactpersonsRouter.post('/', async (req: Request, res: Response) => {
try {
// Authenticate user
const user_ip = req.connection.remoteAddress ?? '';
const user = await UserService.checkSessionWithCookie(req.cookies.betterauth, user_ip);
// Get required parameters
const vendor_id = req.body.vendor_id;
const first_name = req.body.first_name;
const last_name = req.body.last_name;
const gender = req.body.gender;
const email = req.body.email;
const phone = req.body.phone;
const success = await ContactPersonService.createContactEntry(user.user_id, vendor_id, first_name, last_name, gender, email, phone);
if (success) {
res.sendStatus(200);
} else {
res.sendStatus(500);
}
} catch (e) {
console.log('Error handling a request: ' + e.message);
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});
// PUT contactpersons/:id
contactpersonsRouter.put('/:id', async (req: Request, res: Response) => {
try {
// Authenticate user
const user_ip = req.connection.remoteAddress ?? '';
const user = await UserService.checkSessionWithCookie(req.cookies.betterauth, user_ip);
// Get required parameters
const contact_person_id = parseInt(req.params.id, 10);
const vendor_id = req.body.vendor_id;
const first_name = req.body.first_name;
const last_name = req.body.last_name;
const gender = req.body.gender;
const email = req.body.email;
const phone = req.body.phone;
const success = await ContactPersonService.updateContactEntry(user.user_id, contact_person_id, vendor_id, first_name, last_name, gender, email, phone);
if (success) {
res.sendStatus(200);
} else {
res.sendStatus(500);
}
} catch (e) {
console.log('Error handling a request: ' + e.message);
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});

View File

@ -0,0 +1,175 @@
import * as dotenv from 'dotenv';
dotenv.config();
const mariadb = require('mariadb');
const pool = mariadb.createPool({
host: process.env.DB_HOST,
user: process.env.DB_USER,
password: process.env.DB_PASSWORD,
database: process.env.DB_DATABASE,
connectionLimit: 5
});
/**
* Data Model Interfaces
*/
import {Contact_Person} from './contact_person.interface';
import {Contact_Persons} from './contact_persons.interface';
/**
* Service Methods
*/
/**
* Fetches and returns all known contact persons
*/
export const findAll = async (): Promise<Contact_Persons> => {
let conn;
let contRows = [];
try {
conn = await pool.getConnection();
const rows = await conn.query('SELECT contact_person_id, first_name, last_name, gender, email, phone, vendor_id FROM contact_persons');
for (let row in rows) {
if (row !== 'meta') {
contRows.push(rows[row]);
}
}
} catch (err) {
throw err;
} finally {
if (conn) {
conn.end();
}
}
return contRows;
};
/**
* Fetches and returns the contact person with the specified id
* @param id The id of the contact person to fetch
*/
export const find = async (id: number): Promise<Contact_Person> => {
let conn;
let cont: any;
try {
conn = await pool.getConnection();
const rows = await conn.query('SELECT contact_person_id, first_name, last_name, gender, email, phone, vendor_id FROM contact_persons WHERE contact_person_id = ?', id);
for (let row in rows) {
if (row !== 'meta') {
cont = rows[row];
}
}
} catch (err) {
throw err;
} finally {
if (conn) {
conn.end();
}
}
return cont;
};
/**
* Fetches and returns the contact persons for the specified vendor
* @param id The id of the vendor to fetch contact persons for
*/
export const findByVendor = async (id: number): Promise<Contact_Persons> => {
let conn;
let contRows = [];
try {
conn = await pool.getConnection();
const rows = await conn.query('SELECT contact_person_id, first_name, last_name, gender, email, phone, vendor_id FROM contact_persons WHERE vendor_id = ?', id);
for (let row in rows) {
if (row !== 'meta') {
contRows.push(rows[row]);
}
}
} catch (err) {
throw err;
} finally {
if (conn) {
conn.end();
}
}
return contRows;
};
/**
* Creates a contact entry record
* @param user_id The user id of the issuing user
* @param vendor_id The vendor id of the vendor to create the record for
* @param first_name The first name of the contact person
* @param last_name The last name of the contact person
* @param gender The gender of the contact person
* @param email The email of the contact person
* @param phone The phone number of the contact person
*/
export const createContactEntry = async (user_id: number, vendor_id: number, first_name: string, last_name: string, gender: string, email: string, phone: string): Promise<Boolean> => {
let conn;
try {
conn = await pool.getConnection();
// Check if the user is authorized to manage the requested vendor
const user_vendor_rows = await conn.query('SELECT vendor_id FROM vendors WHERE vendor_id = ? AND admin_id = ?', [vendor_id, user_id]);
if (user_vendor_rows.length !== 1) {
return false;
}
// Create contact person entry
const res = await conn.query('INSERT INTO contact_persons (first_name, last_name, gender, email, phone, vendor_id) VALUES (?, ?, ?, ?, ?, ?)', [first_name, last_name, gender, email, phone, vendor_id]);
// If there are more / less than 1 affected rows, return false
return res.affectedRows === 1;
} catch (err) {
throw err;
} finally {
if (conn) {
conn.end();
}
}
};
/**
* Updates a contact entry record
* @param user_id The user id of the issuing user
* @param contact_person_id The id of the record to update
* @param vendor_id The vendor id of the vendor to create the record for
* @param first_name The first name of the contact person
* @param last_name The last name of the contact person
* @param gender The gender of the contact person
* @param email The email of the contact person
* @param phone The phone number of the contact person
*/
export const updateContactEntry = async (user_id: number, contact_person_id: number, vendor_id: number, first_name: string, last_name: string, gender: string, email: string, phone: string): Promise<Boolean> => {
let conn;
try {
conn = await pool.getConnection();
// Check if the user is authorized to manage the requested vendor
const user_vendor_rows = await conn.query('SELECT vendor_id FROM vendors WHERE vendor_id = ? AND admin_id = ?', [vendor_id, user_id]);
if (user_vendor_rows.length !== 1) {
return false;
}
// Create contact person entry
const res = await conn.query('UPDATE contact_persons SET first_name = ?, last_name = ?, gender = ?, email = ?, phone = ? WHERE contact_person_id = ? AND vendor_id = ?', [first_name, last_name, gender, email, phone, contact_person_id, vendor_id]);
// If there are more / less than 1 affected rows, return false
return res.affectedRows === 1;
} catch (err) {
throw err;
} finally {
if (conn) {
conn.end();
}
}
};

View File

@ -19,7 +19,7 @@ export const manufacturersRouter = express.Router();
* Controller Definitions
*/
// GET items/
// GET manufacturers/
manufacturersRouter.get('/', async (req: Request, res: Response) => {
try {
const manufacturers: Manufacturers = await ManufacturerService.findAll();
@ -31,7 +31,7 @@ manufacturersRouter.get('/', async (req: Request, res: Response) => {
}
});
// GET items/:id
// GET manufacturers/:id
manufacturersRouter.get('/:id', async (req: Request, res: Response) => {
const id: number = parseInt(req.params.id, 10);
@ -50,7 +50,7 @@ manufacturersRouter.get('/:id', async (req: Request, res: Response) => {
}
});
// GET items/:term
// GET manufacturers/:term
manufacturersRouter.get('/search/:term', async (req: Request, res: Response) => {
const term: string = req.params.term;

View File

@ -36,7 +36,7 @@ pricealarmsRouter.get('/', async (req: Request, res: Response) => {
});
// POST pricealarms/create
pricealarmsRouter.post('/create', async (req: Request, res: Response) => {
pricealarmsRouter.post('/', async (req: Request, res: Response) => {
try {
// Authenticate user
const user_ip = req.connection.remoteAddress ?? '';
@ -69,7 +69,7 @@ pricealarmsRouter.post('/create', async (req: Request, res: Response) => {
});
// PUT pricealarms/update
pricealarmsRouter.put('/update', async (req: Request, res: Response) => {
pricealarmsRouter.put('/', async (req: Request, res: Response) => {
try {
// Authenticate user
const user_ip = req.connection.remoteAddress ?? '';

View File

@ -4,7 +4,24 @@ export interface Price {
vendor_id: number;
price_in_cents: number;
timestamp: Date;
// Only for deals
amazonDifference?: number;
amazonDifferencePercent?: number;
}
export class Deal implements Price {
price_id: number;
product_id: number;
vendor_id: number;
price_in_cents: number;
timestamp: Date;
amazonDifference: number;
amazonDifferencePercent: number;
constructor(price_id: number, product_id: number, vendor_id: number, price_in_cents: number, timestamp: Date, amazonDifference: number, amazonDifferencePercent: number) {
this.price_id = price_id;
this.product_id = product_id;
this.vendor_id = vendor_id;
this.price_in_cents = price_in_cents;
this.timestamp = timestamp;
this.amazonDifference = amazonDifference;
this.amazonDifferencePercent = amazonDifferencePercent;
}
}

View File

@ -6,6 +6,7 @@ import express, {Request, Response} from 'express';
import * as PriceService from './prices.service';
import {Price} from './price.interface';
import {Prices} from './prices.interface';
import * as UserService from '../users/users.service';
/**
@ -100,3 +101,28 @@ pricesRouter.get('/byProduct/list/:ids', async (req: Request, res: Response) =>
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});
// POST prices/
pricesRouter.post('/', async (req: Request, res: Response) => {
try {
// Authenticate user
const user_ip = req.connection.remoteAddress ?? '';
const user = await UserService.checkSessionWithCookie(req.cookies.betterauth, user_ip);
// Get required parameters
const vendor_id = req.body.vendor_id;
const product_id = req.body.product_id;
const price_in_cents = req.body.price_in_cents;
const success = await PriceService.createPriceEntry(user.user_id, vendor_id, product_id, price_in_cents);
if (success) {
res.sendStatus(200);
} else {
res.sendStatus(500);
}
} catch (e) {
console.log('Error handling a request: ' + e.message);
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});

View File

@ -15,7 +15,7 @@ const pool = mariadb.createPool({
* Data Model Interfaces
*/
import {Price} from './price.interface';
import {Deal, Price} from './price.interface';
import {Prices} from './prices.interface';
@ -31,7 +31,7 @@ export const findAll = async (): Promise<Prices> => {
let priceRows = [];
try {
conn = await pool.getConnection();
const rows = await conn.query('SELECT price_id, product_id, vendor_id, price_in_cents, timestamp FROM prices WHERE active_listing = true');
const rows = await conn.query('SELECT price_id, product_id, v.vendor_id, price_in_cents, timestamp FROM prices p LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id WHERE active_listing = true AND v.isActive = true');
for (let row in rows) {
if (row !== 'meta') {
let price: Price = {
@ -72,7 +72,7 @@ export const find = async (id: number): Promise<Price> => {
let price: any;
try {
conn = await pool.getConnection();
const rows = await conn.query('SELECT price_id, product_id, vendor_id, price_in_cents, timestamp FROM prices WHERE price_id = ? AND active_listing = true', id);
const rows = await conn.query('SELECT price_id, product_id, p.vendor_id, price_in_cents, timestamp FROM prices p LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id WHERE price_id = ? AND active_listing = true AND v.isActive = true', id);
for (let row in rows) {
if (row !== 'meta') {
price = rows[row];
@ -99,7 +99,7 @@ export const findByProduct = async (product: number): Promise<Prices> => {
let priceRows = [];
try {
conn = await pool.getConnection();
const rows = await conn.query('SELECT price_id, product_id, vendor_id, price_in_cents, timestamp FROM prices WHERE product_id = ? AND active_listing = true', product);
const rows = await conn.query('SELECT price_id, product_id, p.vendor_id, price_in_cents, timestamp FROM prices p LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id WHERE product_id = ? AND active_listing = true AND v.isActive = true', product);
for (let row in rows) {
if (row !== 'meta') {
priceRows.push(rows[row]);
@ -142,16 +142,17 @@ export const findByType = async (product: string, type: string): Promise<Prices>
'PARTITION BY p.vendor_id ' +
'ORDER BY p.timestamp DESC) AS rk ' +
'FROM prices p ' +
'WHERE product_id = ? AND vendor_id != 1 AND active_listing = true) ' +
'LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id ' +
'WHERE product_id = ? AND p.vendor_id != 1 AND active_listing = true AND v.isActive = true) ' +
'SELECT s.* ' +
'FROM summary s ' +
'WHERE s.rk = 1 '), product);
} else if (type === 'lowest') {
// Used to get the lowest prices for this product over a period of time
rows = await conn.query('SELECT price_id, product_id, vendor_id, MIN(price_in_cents) as price_in_cents, timestamp FROM prices WHERE product_id = ? AND vendor_id != 1 AND active_listing = true GROUP BY DAY(timestamp) ORDER BY timestamp', product);
rows = await conn.query('SELECT price_id, product_id, p.vendor_id, MIN(price_in_cents) as price_in_cents, timestamp FROM prices p LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id WHERE product_id = ? AND v.vendor_id != 1 AND active_listing = true AND v.isActive = true GROUP BY DAY(timestamp) ORDER BY timestamp', product);
} else {
// If no type is given, return all prices for this product
rows = await conn.query('SELECT price_id, product_id, vendor_id, price_in_cents, timestamp FROM prices WHERE product_id = ? AND vendor_id != 1 AND active_listing = true', product);
rows = await conn.query('SELECT price_id, product_id, p.vendor_id, price_in_cents, timestamp FROM prices p LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id WHERE product_id = ? AND p.vendor_id != 1 AND active_listing = true AND v.isActive = true', product);
}
for (let row in rows) {
@ -188,13 +189,13 @@ export const findByVendor = async (product: string, vendor: string, type: string
let rows = [];
if (type === 'newest') {
// Used to get the newest price for this product and vendor
rows = await conn.query('SELECT price_id, product_id, vendor_id, price_in_cents, timestamp FROM prices WHERE product_id = ? AND vendor_id = ? AND active_listing = true ORDER BY timestamp DESC LIMIT 1', [product, vendor]);
rows = await conn.query('SELECT price_id, product_id, p.vendor_id, price_in_cents, timestamp FROM prices p LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id WHERE product_id = ? AND p.vendor_id = ? AND active_listing = true AND v.isActive = true ORDER BY timestamp DESC LIMIT 1', [product, vendor]);
} else if (type === 'lowest') {
// Used to get the lowest prices for this product and vendor in all time
rows = await conn.query('SELECT price_id, product_id, vendor_id, MIN(price_in_cents) as price_in_cents, timestamp FROM prices WHERE product_id = ? AND vendor_id = ? AND active_listing = true LIMIT 1', [product, vendor]);
rows = await conn.query('SELECT price_id, product_id, p.vendor_id, MIN(price_in_cents) as price_in_cents, timestamp FROM prices p LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id WHERE product_id = ? AND p.vendor_id = ? AND active_listing = true AND v.isActive = true LIMIT 1', [product, vendor]);
} else {
// If no type is given, return all prices for this product and vendor
rows = await conn.query('SELECT price_id, product_id, vendor_id, price_in_cents, timestamp FROM prices WHERE product_id = ? AND vendor_id = ? AND active_listing = true', [product, vendor]);
rows = await conn.query('SELECT price_id, product_id, p.vendor_id, price_in_cents, timestamp FROM prices p LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id WHERE product_id = ? AND p.vendor_id = ? AND active_listing = true AND v.isActive = true', [product, vendor]);
}
for (let row in rows) {
@ -237,7 +238,7 @@ export const getBestDeals = async (amount: number): Promise<Prices> => {
' ROW_NUMBER() OVER(\n' +
' PARTITION BY p.product_id, p.vendor_id\n' +
' ORDER BY p.timestamp DESC) AS rk\n' +
' FROM prices p WHERE active_listing = true)\n' +
' FROM prices p LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id WHERE active_listing = true AND v.isActive = true)\n' +
'SELECT s.*\n' +
'FROM summary s\n' +
'WHERE s.rk = 1');
@ -254,7 +255,7 @@ export const getBestDeals = async (amount: number): Promise<Prices> => {
}
// Iterate over all prices to find the products with the biggest difference between amazon and other vendor
let deals: Price[] = [];
let deals: Deal[] = [];
Object.keys(allPrices).forEach(productId => {
if (allPrices[parseInt(productId)]) {
@ -286,7 +287,7 @@ export const getBestDeals = async (amount: number): Promise<Prices> => {
// Push only deals were the amazon price is actually higher
if (deal.amazonDifferencePercent > 0) {
deals.push(deal as Price);
deals.push(deal as Deal);
}
}
});
@ -300,7 +301,6 @@ export const getBestDeals = async (amount: number): Promise<Prices> => {
for (let dealIndex = 0; dealIndex < maxAmt; dealIndex++) {
priceRows.push(deals[dealIndex] as Price);
}
} catch (err) {
console.log(err);
throw err;
@ -315,7 +315,7 @@ export const getBestDeals = async (amount: number): Promise<Prices> => {
/**
* Fetches and returns the lowest, latest, non-amazon price for each given product
* @param ids the ids of the products
* @param productIds the ids of the products
*/
export const findListByProducts = async (productIds: [number]): Promise<Prices> => {
let conn;
@ -335,8 +335,8 @@ export const findListByProducts = async (productIds: [number]): Promise<Prices>
' ROW_NUMBER() OVER(\n' +
' PARTITION BY p.product_id, p.vendor_id\n' +
' ORDER BY p.timestamp DESC) AS rk\n' +
' FROM prices p' +
' WHERE p.product_id IN (?)' +
' FROM prices p LEFT OUTER JOIN vendors v ON v.vendor_id = p.vendor_id ' +
' WHERE p.product_id IN (?) AND v.isActive = true' +
' AND p.vendor_id != 1 AND active_listing = true)\n' +
'SELECT s.*\n' +
'FROM summary s\n' +
@ -365,7 +365,6 @@ export const findListByProducts = async (productIds: [number]): Promise<Prices>
priceRows.push(pricesForProd[0]);
}
});
} catch (err) {
throw err;
} finally {
@ -376,3 +375,28 @@ export const findListByProducts = async (productIds: [number]): Promise<Prices>
return priceRows;
};
export const createPriceEntry = async (user_id: number, vendor_id: number, product_id: number, price_in_cents: number): Promise<Boolean> => {
let conn;
try {
conn = await pool.getConnection();
// Check if the user is authorized to manage the requested vendor
const user_vendor_rows = await conn.query('SELECT vendor_id FROM vendors WHERE vendor_id = ? AND admin_id = ?', [vendor_id, user_id]);
if (user_vendor_rows.length !== 1) {
return false;
}
// Create price entry
const res = await conn.query('INSERT INTO prices (product_id, vendor_id, price_in_cents) VALUES (?,?,?)', [product_id, vendor_id, price_in_cents]);
// If there are more / less than 1 affected rows, return false
return res.affectedRows === 1;
} catch (err) {
throw err;
} finally {
if (conn) {
conn.end();
}
}
};

View File

@ -87,3 +87,22 @@ productsRouter.get('/list/:ids', async (req: Request, res: Response) => {
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});
// GET products/vendor/:id
productsRouter.get('/vendor/:id', async (req: Request, res: Response) => {
const id: number = parseInt(req.params.id, 10);
if (!id) {
res.status(400).send('Missing parameters.');
return;
}
try {
const products: Products = await ProductService.findByVendor(id);
res.status(200).send(products);
} catch (e) {
console.log('Error handling a request: ' + e.message);
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});

View File

@ -159,3 +159,41 @@ export const findList = async (ids: [number]): Promise<Products> => {
return prodRows;
};
/**
* Fetches and returns the products that the given vendor has price entries for
* @param id The id of the vendor to fetch the products for
*/
export const findByVendor = async (id: number): Promise<Products> => {
let conn;
let prodRows = [];
try {
conn = await pool.getConnection();
// Get the relevant product ids
let relevant_prod_ids = [];
const relevantProds = await conn.query('SELECT product_id FROM prices WHERE vendor_id = ? GROUP BY product_id', id);
for (let row in relevantProds) {
if (row !== 'meta') {
relevant_prod_ids.push(relevantProds[row].product_id);
}
}
// Fetch products
const rows = await conn.query('SELECT product_id, name, asin, is_active, short_description, long_description, image_guid, date_added, last_modified, manufacturer_id, selling_rank, category_id FROM products WHERE product_id IN (?)', [relevant_prod_ids]);
for (let row in rows) {
if (row !== 'meta') {
prodRows.push(rows[row]);
}
}
} catch (err) {
throw err;
} finally {
if (conn) {
conn.end();
}
}
return prodRows;
};

View File

@ -99,7 +99,53 @@ vendorsRouter.put('/manage/deactivatelisting', async (req: Request, res: Respons
const success = await VendorService.deactivateListing(user.user_id, vendor_id, product_id);
if(success) {
if (success) {
res.sendStatus(200);
} else {
res.sendStatus(500);
}
} catch (e) {
console.log('Error handling a request: ' + e.message);
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});
// PUT /manage/shop/deactivate/:id
vendorsRouter.put('/manage/shop/deactivate/:id', async (req: Request, res: Response) => {
try {
// Authenticate user
const user_ip = req.connection.remoteAddress ?? '';
const user = await UserService.checkSessionWithCookie(req.cookies.betterauth, user_ip);
// Get required parameters
const vendor_id = parseInt(req.params.id, 10);
const success = await VendorService.setShopStatus(user.user_id, vendor_id, false);
if (success) {
res.sendStatus(200);
} else {
res.sendStatus(500);
}
} catch (e) {
console.log('Error handling a request: ' + e.message);
res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
}
});
// PUT /manage/shop/activate/:id
vendorsRouter.put('/manage/shop/activate/:id', async (req: Request, res: Response) => {
try {
// Authenticate user
const user_ip = req.connection.remoteAddress ?? '';
const user = await UserService.checkSessionWithCookie(req.cookies.betterauth, user_ip);
// Get required parameters
const vendor_id = parseInt(req.params.id, 10);
const success = await VendorService.setShopStatus(user.user_id, vendor_id, true);
if (success) {
res.sendStatus(200);
} else {
res.sendStatus(500);

View File

@ -32,7 +32,7 @@ export const findAll = async (): Promise<Vendors> => {
let vendorRows = [];
try {
conn = await pool.getConnection();
const rows = await conn.query('SELECT vendor_id, name, streetname, zip_code, city, country_code, phone, website FROM vendors');
const rows = await conn.query('SELECT vendor_id, name, streetname, zip_code, city, country_code, phone, website FROM vendors WHERE isActive = true');
for (let row in rows) {
if (row !== 'meta') {
let vendor: Vendor = {
@ -79,7 +79,7 @@ export const find = async (id: number): Promise<Vendor> => {
let vendor: any;
try {
conn = await pool.getConnection();
const rows = await conn.query('SELECT vendor_id, name, streetname, zip_code, city, country_code, phone, website FROM vendors WHERE vendor_id = ?', id);
const rows = await conn.query('SELECT vendor_id, name, streetname, zip_code, city, country_code, phone, website FROM vendors WHERE vendor_id = ? AND isActive = true', id);
for (let row in rows) {
if (row !== 'meta') {
vendor = rows[row];
@ -107,7 +107,7 @@ export const findBySearchTerm = async (term: string): Promise<Vendors> => {
try {
conn = await pool.getConnection();
term = '%' + term + '%';
const rows = await conn.query('SELECT vendor_id, name, streetname, zip_code, city, country_code, phone, website FROM vendors WHERE name LIKE ?', term);
const rows = await conn.query('SELECT vendor_id, name, streetname, zip_code, city, country_code, phone, website FROM vendors WHERE name LIKE ? AND isActive = true', term);
for (let row in rows) {
if (row !== 'meta') {
vendorRows.push(rows[row]);
@ -171,10 +171,39 @@ export const deactivateListing = async (user_id: number, vendor_id: number, prod
const status = await conn.query('UPDATE prices SET active_listing = false WHERE vendor_id = ? and product_id = ?', [vendor_id, product_id]);
if(status.affectedRows > 0){
return true;
}
return false;
return status.affectedRows > 0;
} catch (err) {
throw err;
} finally {
if (conn) {
conn.end();
}
}
return false;
};
/**
* Set the specified shop to either active or not active
* @param user_id The user id of the issuing user
* @param vendor_id The vendor id of the shop to update
* @param isActive The new active state
*/
export const setShopStatus = async (user_id: number, vendor_id: number, isActive: boolean): Promise<Boolean> => {
let conn;
try {
conn = await pool.getConnection();
// Check if the user is authorized to manage the requested vendor
const user_vendor_rows = await conn.query('SELECT vendor_id FROM vendors WHERE vendor_id = ? AND admin_id = ?', [vendor_id, user_id]);
if (user_vendor_rows.length !== 1) {
return false;
}
// Update the vendor state
const status = await conn.query('UPDATE vendors SET isActive = ? WHERE vendor_id = ?', [isActive, vendor_id]);
return status.affectedRows > 0;
} catch (err) {
throw err;
} finally {

View File

@ -2,13 +2,13 @@
<module type="WEB_MODULE" version="4">
<component name="FacetManager">
<facet type="Python" name="Python">
<configuration sdkName="Python 3.9" />
<configuration sdkName="Python 3.9 (venv)" />
</facet>
</component>
<component name="NewModuleRootManager" inherit-compiler-output="true">
<exclude-output />
<content url="file://$MODULE_DIR$" />
<orderEntry type="sourceFolder" forTests="false" />
<orderEntry type="library" name="Python 3.9 interpreter library" level="application" />
<orderEntry type="library" name="Python 3.9 (venv) interpreter library" level="application" />
</component>
</module>

View File

@ -1,13 +1,17 @@
import os
from flask import Flask
from flask_restful import Resource, Api, reqparse
import crawler
app = Flask(__name__)
api = Api(app)
# To parse request data
parser = reqparse.RequestParser()
parser.add_argument('key')
parser.add_argument('products')
parser.add_argument('key', type=str)
parser.add_argument('products', type=int, action='append')
class CrawlerApi(Resource):
@ -17,7 +21,12 @@ class CrawlerApi(Resource):
def post(self):
# Accept crawler request here
args = parser.parse_args()
return args
access_key = os.getenv('CRAWLER_ACCESS_KEY')
if(args['key'] == access_key):
crawler.crawl(args['products'])
return {'message': 'success'}
else:
return {'message': 'Wrong access key'}
api.add_resource(CrawlerApi, '/')

View File

@ -1,4 +1,10 @@
import sql
import requests
from bs4 import BeautifulSoup
HEADERS = ({'User-Agent':
'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 '
'Safari/537.36'})
def crawl(product_ids: [int]) -> dict:
@ -28,13 +34,19 @@ def crawl(product_ids: [int]) -> dict:
# Call the appropriate vendor crawling function and append the result to the list of crawled data
if product_vendor_info['vendor_id'] == 1:
# Amazon
crawled_data.append(__crawl_amazon__(product_vendor_info))
data = __crawl_amazon__(product_vendor_info)
if data:
crawled_data.append(data)
elif product_vendor_info['vendor_id'] == 2:
# Apple
crawled_data.append(__crawl_apple__(product_vendor_info))
data = __crawl_apple__(product_vendor_info)
if data:
crawled_data.append(data)
elif product_vendor_info['vendor_id'] == 3:
# Media Markt
crawled_data.append(__crawl_mediamarkt__(product_vendor_info))
data = __crawl_mediamarkt__(product_vendor_info)
if data:
crawled_data.append(data)
else:
products_with_problems.append(product_vendor_info)
continue
@ -57,7 +69,23 @@ def __crawl_amazon__(product_info: dict) -> tuple:
:param product_info: A dict with product info containing product_id, vendor_id, url
:return: A tuple with the crawled data, containing (product_id, vendor_id, price_in_cents)
"""
return (product_info['product_id'], product_info['vendor_id'], 123)
page = requests.get(product_info['url'], headers=HEADERS)
soup = BeautifulSoup(page.content, features="lxml")
try:
price = int(
soup.find(id='priceblock_ourprice').get_text().replace(".", "").replace(",", "").replace("", "").strip())
if not price:
price = int(soup.find(id='price_inside_buybox').get_text().replace(".", "").replace(",", "").replace("", "").strip())
except RuntimeError:
price = -1
except AttributeError:
price = -1
if price != -1:
return (product_info['product_id'], product_info['vendor_id'], price)
else:
return None
def __crawl_apple__(product_info: dict) -> tuple:
@ -66,7 +94,8 @@ def __crawl_apple__(product_info: dict) -> tuple:
:param product_info: A dict with product info containing product_id, vendor_id, url
:return: A tuple with the crawled data, containing (product_id, vendor_id, price_in_cents)
"""
return (product_info['product_id'], product_info['vendor_id'], 123)
# return (product_info['product_id'], product_info['vendor_id'], 123)
pass
def __crawl_mediamarkt__(product_info: dict) -> tuple:

View File

@ -1,66 +0,0 @@
# -*- coding: utf-8 -*-
import scrapy
from urllib.parse import urlencode
from urllib.parse import urljoin
import re
import json
queries = ['iphone']
API = ''
def get_url(url):
payload = {'api_key': API, 'url': url, 'country_code': 'us'}
proxy_url = 'http://api.scraperapi.com/?' + urlencode(payload)
return proxy_url
class AmazonSpider(scrapy.Spider):
name = 'amazon'
def start_requests(self):
for query in queries:
url = 'https://www.amazon.de/s?' + urlencode({'k': query})
yield scrapy.Request(url=url, callback=self.parse_keyword_response)
def parse_keyword_response(self, response):
products = response.xpath('//*[@data-asin]')
for product in products:
asin = product.xpath('@data-asin').extract_first()
product_url = f"https://www.amazon.de/dp/{asin}"
yield scrapy.Request(url=product_url, callback=self.parse_product_page, meta={'asin': asin})
next_page = response.xpath('//li[@class="a-last"]/a/@href').extract_first()
if next_page:
url = urljoin("https://www.amazon.de", next_page)
yield scrapy.Request(url=url, callback=self.parse_keyword_response)
def parse_product_page(self, response):
asin = response.meta['asin']
title = response.xpath('//*[@id="productTitle"]/text()').extract_first()
image = re.search('"large":"(.*?)"', response.text).groups()[0]
rating = response.xpath('//*[@id="acrPopover"]/@title').extract_first()
number_of_reviews = response.xpath('//*[@id="acrCustomerReviewText"]/text()').extract_first()
price = response.xpath('//*[@id="priceblock_ourprice"]/text()').extract_first()
if not price:
price = response.xpath('//*[@data-asin-price]/@data-asin-price').extract_first() or \
response.xpath('//*[@id="price_inside_buybox"]/text()').extract_first()
temp = response.xpath('//*[@id="twister"]')
sizes = []
colors = []
if temp:
s = re.search('"variationValues" : ({.*})', response.text).groups()[0]
json_acceptable = s.replace("'", "\"")
di = json.loads(json_acceptable)
sizes = di.get('size_name', [])
colors = di.get('color_name', [])
bullet_points = response.xpath('//*[@id="feature-bullets"]//li/span/text()').extract()
seller_rank = response.xpath(
'//*[text()="Amazon Best Sellers Rank:"]/parent::*//text()[not(parent::style)]').extract()
yield {'asin': asin, 'Title': title, 'MainImage': image, 'Rating': rating, 'NumberOfReviews': number_of_reviews,
'Price': price, 'AvailableSizes': sizes, 'AvailableColors': colors, 'BulletPoints': bullet_points,
'SellerRank': seller_rank}

View File

@ -1,5 +1,7 @@
pymysql
flask
flask==1.1.2
flask-sqlalchemy
flask_restful
scrapy
beautifulsoup4
requests
lxml

View File

@ -54,7 +54,6 @@ def getProductLinksForProduct(product_id: int) -> [dict]:
cur = conn.cursor()
query = 'SELECT vendor_id, url FROM product_links WHERE product_id = %s'
cur.execute(query, (product_id,))
products = list(map(lambda x: {'product_id': product_id, 'vendor_id': x[0], 'url': x[1]}, cur.fetchall()))

View File

@ -0,0 +1,33 @@
import scrapy
from scrapy.crawler import CrawlerProcess
import re
class AmazonSpider(scrapy.Spider):
name = 'amazon'
allowed_domains = ['amazon.de']
start_urls = ['https://amazon.de/dp/B083DRCPJG']
# def __init__(self, start_urls):
# self.start_urls = start_urls
def parse(self, response):
price = response.xpath('//*[@id="priceblock_ourprice"]/text()').extract_first()
if not price:
price = response.xpath('//*[@data-asin-price]/@data-asin-price').extract_first() or \
response.xpath('//*[@id="price_inside_buybox"]/text()').extract_first()
euros = re.match('(\d*),\d\d', price).group(1)
cents = re.match('\d*,(\d\d)', price).group(1)
priceincents = euros + cents
yield {'price': priceincents}
def start_crawling():
process = CrawlerProcess(
settings={'COOKIES_ENABLED': 'False', 'CONCURRENT_REQUESTS_PER_IP': 1, 'ROBOTSTXT_OBEY': False,
'USER_AGENT': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36',
'DOWNLOAD_DELAY': 3}
, install_root_handler=False)
process.crawl()
process.start()

View File

@ -0,0 +1,25 @@
import scrapy
import re
class AmazonSpider(scrapy.Spider):
name = 'amazon'
allowed_domains = ['amazon.de']
start_urls = ['https://amazon.de/dp/B083DRCPJG']
def parse(self, response):
price = response.xpath('//*[@id="priceblock_ourprice"]/text()').extract_first()
if not price:
price = response.xpath('//*[@data-asin-price]/@data-asin-price').extract_first() or \
response.xpath('//*[@id="price_inside_buybox"]/text()').extract_first()
euros = re.match('(\d*),\d\d', price).group(1)
cents = re.match('\d*,(\d\d)', price).group(1)
priceincents = euros + cents
yield {'price': priceincents}

View File

@ -0,0 +1,6 @@
export interface PriceAlarm {
alarm_id: number;
user_id: number;
product_id: number;
defined_price: number;
}

View File

@ -5,6 +5,7 @@ import {Product} from '../models/product';
import {Price} from '../models/price';
import {Observable, of} from 'rxjs';
import {Vendor} from '../models/vendor';
import {PriceAlarm} from '../models/pricealarm';
@Injectable({
providedIn: 'root'
@ -17,83 +18,191 @@ export class ApiService {
) {
}
/* ____ __ __
/ __ \_________ ____/ /_ _______/ /______
/ /_/ / ___/ __ \/ __ / / / / ___/ __/ ___/
/ ____/ / / /_/ / /_/ / /_/ / /__/ /_(__ )
/_/ /_/ \____/\__,_/\__,_/\___/\__/____/
*/
/**
* Gets the specified product from the API
* @param id The id of the product to get
* @return Observable<Product> An observable containing a single product
*/
getProduct(id): Observable<Product> {
try {
const prod = this.http.get<Product>((this.apiUrl + '/products/' + id));
return prod;
return this.http.get<Product>((this.apiUrl + '/products/' + id));
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}
}
/**
* Gets a list of products that match the given search term
* @param query The search term to match
* @return Observable<Product[]> An observable list of products
*/
getProductsByQuery(query): Observable<Product[]> {
try {
const prods = this.http.get<Product[]>((this.apiUrl + '/products/search/' + query));
return prods;
return this.http.get<Product[]>((this.apiUrl + '/products/search/' + query));
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}
}
/**
* Gets a list of all products
* @return Observable<Product[]> An observable list of products
*/
getProducts(): Observable<Product[]> {
try {
const prods = this.http.get<Product[]>((this.apiUrl + '/products'));
return prods;
return this.http.get<Product[]>((this.apiUrl + '/products'));
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}
}
/* ____ _
/ __ \_____(_)_______ _____
/ /_/ / ___/ / ___/ _ \/ ___/
/ ____/ / / / /__/ __(__ )
/_/ /_/ /_/\___/\___/____/
*/
/**
* Gets a list of all prices
* @return Observable<Price[]> An observable list of prices
*/
getPrices(): Observable<Price[]> {
try {
const prices = this.http.get<Price[]>((this.apiUrl + '/prices'));
return prices;
return this.http.get<Price[]>((this.apiUrl + '/prices'));
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}
}
/**
* Gets the lowest prices of every vendor for the given product
* @param productId The product id of the product to fetch the prices for
* @return Observable<Price[]> An observable list of prices
*/
getLowestPrices(productId): Observable<Price[]> {
try {
let params = new HttpParams();
params = params.append('product', productId);
params = params.append('type', 'lowest');
const prices = this.http.get<Price[]>((this.apiUrl + '/prices'), {params});
return prices;
return this.http.get<Price[]>((this.apiUrl + '/prices'), {params});
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}
}
/**
* Gets the latest amazon price for the given product
* @param productId The product id of the product to get the price for
* @return Observable<Price> An observable containing a single price
*/
getAmazonPrice(productId): Observable<Price> {
try {
let params = new HttpParams();
params = params.append('product', productId);
params = params.append('vendor', '1');
params = params.append('type', 'newest');
const price = this.http.get<Price>((this.apiUrl + '/prices'), {params});
return price;
return this.http.get<Price>((this.apiUrl + '/prices'), {params});
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}
}
/**
* Gets the newest prices of every vendor for the given product
* @param productId The product id of the product to fetch the prices for
* @return Observable<Price[]> An observable list of prices
*/
getCurrentPricePerVendor(productId): Observable<Price[]> {
try {
let params = new HttpParams();
params = params.append('product', productId);
params = params.append('type', 'newest');
const prices = this.http.get<Price[]>((this.apiUrl + '/prices'), {params});
return prices;
return this.http.get<Price[]>((this.apiUrl + '/prices'), {params});
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}
}
/* _ __ __
| | / /__ ____ ____/ /___ __________
| | / / _ \/ __ \/ __ / __ \/ ___/ ___/
| |/ / __/ / / / /_/ / /_/ / / (__ )
|___/\___/_/ /_/\__,_/\____/_/ /____/
*/
/**
* Gets a list of all vendors
* @return Observable<Vendor[]> An observable list of vendors
*/
getVendors(): Observable<Vendor[]> {
try {
const vendors = this.http.get<Vendor[]>((this.apiUrl + '/vendors'));
return vendors;
return this.http.get<Vendor[]>((this.apiUrl + '/vendors'));
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}
}
/* ____ _ ___ __
/ __ \_____(_)_______ / | / /___ __________ ___ _____
/ /_/ / ___/ / ___/ _ \ / /| | / / __ `/ ___/ __ `__ \/ ___/
/ ____/ / / / /__/ __/ / ___ |/ / /_/ / / / / / / / (__ )
/_/ /_/ /_/\___/\___/ /_/ |_/_/\__,_/_/ /_/ /_/ /_/____/
*/
/**
* Gets a list of all price alarms
* @return Observable<PriceAlarm[]> An observable list of price alarms
*/
getPriceAlarms(): Observable<PriceAlarm[]> {
try {
return this.http.get<PriceAlarm[]>((this.apiUrl + '/pricealarms'));
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}
}
/**
* Creates a new price alarm
* @param productId The product id of the product to create the alarm for
* @param definedPrice The defined target price
* @return Observable<any> The observable response of the api
*/
createPriceAlarms(productId: number, definedPrice: number): Observable<any> {
try {
return this.http.post((this.apiUrl + '/pricealarms'), JSON.stringify({
product_id: productId,
defined_price: definedPrice
}));
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}
}
/**
* Updates the given price alarm
* @param alarmId The alarm id of the alarm to update
* @param definedPrice The defined target price
* @return Observable<any> The observable response of the api
*/
updatePriceAlarms(alarmId: number, definedPrice: number): Observable<any> {
try {
return this.http.put((this.apiUrl + '/pricealarms'), JSON.stringify({
alarm_id: alarmId,
defined_price: definedPrice
}));
} catch (exception) {
process.stderr.write(`ERROR received from ${this.apiUrl}: ${exception}\n`);
}