Chapter 6: updates

Chapter06/express-app/index.js

@@ -1,14 +1,14 @@
-const express = require('express')
+const express = require("express");
-const path = require('path')
+const path = require("path");
-const index = require('./routes/index')
+const index = require("./routes/index");
 
-const PORT = process.env.PORT || 3000
+const PORT = process.env.PORT || 3000;
 
-const app = express()
+const app = express();
 
-app.use(express.static(path.join(__dirname, 'public')))
+app.use(express.static(path.join(__dirname, "public")));
-app.use('/', index)
+app.use("/", index);
 
 app.listen(PORT, () => {
-    console.log(`Server listening on port ${PORT}`)
+  console.log(`Server listening on port ${PORT}`);
-})
+});

Chapter06/level/level-app/index.js

@@ -1,45 +0,0 @@
-const {hash} = require('xxhash')
-const through = require('through2')
-const eos = require('end-of-stream')
-const level = require('level')
-
-const db = level('./data')
-
-const params = {
-  author: process.argv[2],
-  quote: process.argv[3]
-}
-
-if (params.author && params.quote) {
-  add(params, (err) => {
-    if (err) console.error(err)    
-    list(params.author)
-  })
-  return
-}
-
-if (params.author) { 
-  list(params.author)
-  return
-}
-
-function add({quote, author}, cb) {
-  const key = author + hash(Buffer.from(quote), 0xDAF1DC)
-  db.put(key, quote, cb) 
-}
-
-function list (author) {
-  if (!author) db.close()
-  const quotes = db.createValueStream({
-    gte: author,
-    lt: String.fromCharCode(author.charCodeAt(0) + 1)
-  })
-  const format = through((quote, enc, cb) => {
-    cb(null, `${author} ${quote}`)
-  })
-  quotes.pipe(format).pipe(process.stdout)
-  eos(format, () => {
-    db.close()
-    console.log()
-  })
-}

Chapter06/level/level-app/package.json

@@ -1,18 +0,0 @@
-{
-  "name": "level-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "end-of-stream": "^1.1.0",
-    "level": "^1.6.0",
-    "through2": "^2.0.3",
-    "xxhash": "^0.2.4"
-  }
-}

Chapter06/level/level-sql-app/index.js

@@ -1,45 +0,0 @@
-const {hash} = require('xxhash')
-const through = require('through2')
-const eos = require('end-of-stream')
-const levelup = require('levelup')
-const sqldown = require('sqldown')
-const db = levelup('./data', {db: sqldown})
-
-const params = {
-  author: process.argv[2],
-  quote: process.argv[3]
-}
-
-if (params.author && params.quote) {
-  add(params, (err) => {
-    if (err) console.error(err)    
-    list(params.author)
-  })
-  return
-}
-
-if (params.author) { 
-  list(params.author)
-  return
-}
-
-function add({quote, author}, cb) {
-  const key = author + hash(Buffer.from(quote), 0xDAF1DC)
-  db.put(key, quote, cb) 
-}
-
-function list (author) {
-  if (!author) db.close()
-  const quotes = db.createValueStream({
-    gte: author,
-    lt: String.fromCharCode(author.charCodeAt(0) + 1)
-  })
-  const format = through((quote, enc, cb) => {
-    cb(null, `${author} ${quote}`)
-  })
-  quotes.pipe(format).pipe(process.stdout)
-  eos(format, () => {
-    db.close()
-    console.log()
-  })
-}

Chapter06/level/level-sql-app/package.json

@@ -1,20 +0,0 @@
-{
-  "name": "level-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "end-of-stream": "^1.1.0",
-    "levelup": "^1.3.3",
-    "sqldown": "^2.1.0",
-    "sqlite": "^2.3.0",
-    "through2": "^2.0.3",
-    "xxhash": "^0.2.4"
-  }
-}

Chapter06/mongodb/mongo-app/authors.js

@@ -1,17 +0,0 @@
-const {MongoClient} = require('mongodb')
-const client = new MongoClient()
-
-client.connect('mongodb://localhost:27017/quotes', ready)
-
-function ready (err, db) {
-  if (err) throw err
-  const collection = db.collection('quotes')
-  collection.ensureIndex('author', (err) => {
-    if (err) throw err
-    collection.distinct('author', (err, result) => {
-      if (err) throw err
-      console.log(result.join('\n'))
-      db.close()
-    })
-  })
-}

Chapter06/mongodb/mongo-app/index.js

@@ -1,39 +0,0 @@
-const {MongoClient} = require('mongodb')
-const client = new MongoClient()
-
-const params = {
-  author: process.argv[2],
-  quote: process.argv[3]
-}
-
-client.connect('mongodb://localhost:27017/quotes', ready)
-
-function ready (err, db) {
-  if (err) throw err
-  const collection = db.collection('quotes')
-
-  if (params.author && params.quote) {
-    collection.insert({
-      author: params.author,
-      quote: params.quote
-    }, (err) => {
-      if (err) throw err
-    })
-  }
-
-  if (params.author) {
-    collection.find({
-      author: params.author
-    }).each((err, doc) => {
-      if (err) throw err
-      if (!doc) {
-        db.close()
-        return
-      }
-      console.log('%s: %s \n', doc.author, doc.quote)
-    })
-    return
-  }
-
-  db.close()
-}

Chapter06/mongodb/mongo-app/package.json

@@ -1,15 +0,0 @@
-{
-  "name": "mongo-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "mongodb": "^2.2.16"
-  }
-}

Chapter06/mongodb/mongo-app/votes.js

@@ -1,52 +0,0 @@
-const {MongoClient, ObjectID} = require('mongodb')
-const client = new MongoClient()
-const params = {id: process.argv[2]}
-
-client.connect('mongodb://localhost:27017/quotes', ready)
-
-function ready (err, db) {
-  if (err) throw err
-  const collection = db.collection('quotes')
-
-  if (!params.id) {
-    showIds(collection, db)
-    return
-  }
-
-  vote(params.id, db, collection)
-}
-
-function showIds (collection, db) {
-  collection.find().each((err, doc) => {
-    if (err) throw err
-    if (doc) {
-      console.log(doc._id, doc.quote)
-      return
-    }
-    db.close()
-  })
-}
-
-function vote (id, db, collection) {
-  const query = {
-    _id: ObjectID(id)
-  }
-  const action = {$inc: {votes: 1}}
-  const opts = {safe: true}
-  collection.update(query, action, opts, (err) => {
-    if (err) throw err
-    console.log('1 vote added to %s by %s', params.id)
-    const by = {votes: 1}
-    const max = 10
-    collection.find().sort(by).limit(max).each((err, doc) => {
-      if (err) throw err
-      if (doc) {
-        const votes = doc.votes || 0
-        console.log(`${votes} | ${doc.author}: ${doc.quote.substr(0, 30)}...`)
-        return
-      }
-      db.close()
-    })
-  })
-  return
-}

Chapter06/mysql/insert-quotes/index.js

@@ -1,42 +0,0 @@
-const mysql = require('mysql')
-
-const params = {
-  author: process.argv[2], 
-  quote: process.argv[3]
-}
-
-const db = mysql.createConnection({ 
-  user: 'root', 
-  //password: 'pw-if-set',
-  //debug: true 
-})
-
-db.query('CREATE DATABASE quotes')
-db.query('USE quotes')
-
-db.query(`
-  CREATE TABLE quotes.quotes ( 
-    id INT NOT NULL AUTO_INCREMENT,  
-    author VARCHAR ( 128 ) NOT NULL, 
-    quote TEXT NOT NULL, PRIMARY KEY ( id ) 
-  )
-`)
-
-const ignore = new Set([
-  'ER_DB_CREATE_EXISTS',
-  'ER_TABLE_EXISTS_ERROR'
-])
-
-db.on('error',  (err) => {
-  if (ignore.has(err.code)) return 
-  throw err 
-})
-
-if (params.author && params.quote) {
-  db.query(`
-    INSERT INTO quotes.quotes (author, quote)
-    VALUES (?, ?);
-  `, [params.author, params.quote])
-}
-
-db.end()

Chapter06/mysql/insert-quotes/package.json

@@ -1,15 +0,0 @@
-{
-  "name": "mysql-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "mysql": "^2.12.0"
-  }
-}

Chapter06/mysql/mysql-app/index.js

@@ -1,34 +0,0 @@
-const mysql = require('mysql') 
-const db = mysql.createConnection({ 
-  user: 'root', 
-  //password: 'pw-if-set',
-  //debug: true 
-})
-
-db.query('CREATE DATABASE quotes')
-db.query('USE quotes')
-
-db.query(`
-  CREATE TABLE quotes.quotes ( 
-    id INT NOT NULL AUTO_INCREMENT,  
-    author VARCHAR ( 128 ) NOT NULL, 
-    quote TEXT NOT NULL, PRIMARY KEY ( id ) 
-  )
-`)
-
-const ignore = new Set([
-  'ER_DB_CREATE_EXISTS',
-  'ER_TABLE_EXISTS_ERROR'
-])
-
-db.on('error',  (err) => {
-  if (ignore.has(err.code)) return 
-  throw err 
-})
-
-db.query(`
-  INSERT INTO quotes.quotes (author, quote)
-  VALUES ("Bjarne Stroustrup", "Proof by analogy is fraud.");
-`)
-
-db.end()

Chapter06/mysql/mysql-app/package.json

@@ -1,15 +0,0 @@
-{
-  "name": "mysql-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "mysql": "^2.12.0"
-  }
-}

Chapter06/mysql/quotes-app/index.js

@@ -1,51 +0,0 @@
-const mysql = require('mysql')
-
-const params = {
-  author: process.argv[2], 
-  quote: process.argv[3]
-}
-
-const db = mysql.createConnection({ 
-  user: 'root', 
-  //password: 'pw-if-set',
-  //debug: true 
-})
-
-db.query('CREATE DATABASE quotes')
-db.query('USE quotes')
-
-db.query(`
-  CREATE TABLE quotes.quotes ( 
-    id INT NOT NULL AUTO_INCREMENT,  
-    author VARCHAR ( 128 ) NOT NULL, 
-    quote TEXT NOT NULL, PRIMARY KEY ( id ) 
-  )
-`)
-
-const ignore = new Set([
-  'ER_DB_CREATE_EXISTS',
-  'ER_TABLE_EXISTS_ERROR'
-])
-
-db.on('error',  (err) => {
-  if (ignore.has(err.code)) return 
-  throw err 
-})
-
-if (params.author && params.quote) {
-  db.query(`
-    INSERT INTO quotes.quotes (author, quote)
-    VALUES (?, ?);
-  `, [params.author, params.quote])
-}
-
-if (params.author) {
-  db.query(`
-    SELECT * FROM quotes 
-    WHERE author LIKE ${db.escape(params.author)}
-  `).on('result', ({author, quote}) => {
-    console.log(`${author} ${quote}`)
-  })
-}
-
-db.end()

Chapter06/mysql/quotes-app/package.json

@@ -1,15 +0,0 @@
-{
-  "name": "mysql-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "mysql": "^2.12.0"
-  }
-}

Chapter06/postgres/postgres-app/index.js

@@ -1,46 +0,0 @@
-const pg = require('pg') 
-const db = new pg.Client()
-const params = {
-  author: process.argv[2], 
-  quote: process.argv[3]
-}
-
-db.connect((err) => {
-  if (err) throw err
-  db.query(`
-    CREATE TABLE IF NOT EXISTS quotes ( 
-      id SERIAL,  
-      author VARCHAR ( 128 ) NOT NULL, 
-      quote TEXT NOT NULL, PRIMARY KEY ( id ) 
-    )
-  `, (err) => {
-    if (err) throw err
-    
-    if (params.author && params.quote) {
-      db.query(`
-        INSERT INTO quotes (author, quote)
-        VALUES ($1, $2);
-      `, [params.author, params.quote], (err) => {
-        if (err) throw err
-        list(db, params)
-      })
-    }
-
-    if (!params.quote) list(db, params)
-  })
-})
-
-function list (db, params) {
-  if (!params.author) return db.end()
-  db.query(`
-    SELECT * FROM quotes 
-    WHERE author LIKE ${db.escapeLiteral(params.author)}
-  `, (err, results) => {
-    if (err) throw err 
-    results.rows.forEach(({author, quote}) => {
-      console.log(`${author} ${quote}`)
-    })
-    db.end()
-  })
-}
-

Chapter06/postgres/postgres-app/package.json

@@ -1,16 +0,0 @@
-{
-  "name": "mysql-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "mysql": "^2.12.0",
-    "pg": "^6.1.2"
-  }
-}

Chapter06/postgres/postgres-native-app/index.js

@@ -1,46 +0,0 @@
-const pg = require('pg').native || require('pg')
-const db = new pg.Client()
-const params = {
-  author: process.argv[2], 
-  quote: process.argv[3]
-}
-
-db.connect((err) => {
-  if (err) throw err
-  db.query(`
-    CREATE TABLE IF NOT EXISTS quotes ( 
-      id SERIAL,  
-      author VARCHAR ( 128 ) NOT NULL, 
-      quote TEXT NOT NULL, PRIMARY KEY ( id ) 
-    )
-  `, (err) => {
-    if (err) throw err
-    
-    if (params.author && params.quote) {
-      db.query(`
-        INSERT INTO quotes (author, quote)
-        VALUES ($1, $2);
-      `, [params.author, params.quote], (err) => {
-        if (err) throw err
-        list(db, params)
-      })
-    }
-
-    if (!params.quote) list(db, params)
-  })
-})
-
-function list (db, params) {
-  if (!params.author) return db.end()
-  db.query(`
-    SELECT * FROM quotes 
-    WHERE author LIKE $1
-  `, [params.author], (err, results) => {
-    if (err) throw err 
-    results.rows.forEach(({author, quote}) => {
-      console.log(`${author} ${quote}`)
-    })
-    db.end()
-  })
-}
-

Chapter06/postgres/postgres-native-app/package.json

@@ -1,19 +0,0 @@
-{
-  "name": "mysql-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "mysql": "^2.12.0",
-    "pg": "^6.1.2"
-  },
-  "optionalDependencies": {
-    "pg-native": "^1.10.0"
-  }
-}

Chapter06/postgres/postgres-object-app/index.js

@@ -1,51 +0,0 @@
-const pg = require('pg') 
-const db = new pg.Client()
-const params = {
-  author: process.argv[2], 
-  quote: process.argv[3]
-}
-
-db.connect((err) => {
-  if (err) throw err
-  db.query(`
-    CREATE TABLE IF NOT EXISTS quote_docs (
-      id SERIAL,  
-      doc jsonb,
-      CONSTRAINT author CHECK (length(doc->>'author') > 0 AND (doc->>'author') IS NOT NULL),
-      CONSTRAINT quote CHECK (length(doc->>'quote') > 0 AND (doc->>'quote') IS NOT NULL)
-    )
-  `, (err) => {
-    if (err) throw err
-
-    if (params.author && params.quote) {
-      db.query(`
-        INSERT INTO quote_docs (doc)
-        VALUES ($1);
-      `, [params], (err) => {
-        if (err) throw err
-        list(db, params)
-      })
-    }
-
-    if (!params.quote) list(db, params)
-
-  })
-})
-
-function list (db, params) {
-  if (!params.author) return db.end()
-  db.query(`
-    SELECT * FROM quote_docs
-    WHERE doc ->> 'author' LIKE ${db.escapeLiteral(params.author)}
-  `, (err, results) => {
-    if (err) throw err 
-    results.rows
-      .map(({doc}) => doc)
-      .forEach(({author, quote}) => {
-        console.log(`${author} ${quote}`)
-      })
-    db.end()
-  })
-}
-
-

Chapter06/postgres/postgres-object-app/package.json

@@ -1,16 +0,0 @@
-{
-  "name": "mysql-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "mysql": "^2.12.0",
-    "pg": "^6.1.2"
-  }
-}

Chapter06/redis/redis-app/index.js

@@ -1,46 +0,0 @@
-const uuid = require('uuid')
-const steed = require('steed')()
-const redis = require('redis')
-const client = redis.createClient() 
-const params = {
-  author: process.argv[2],
-  quote: process.argv[3]
-}
-
-if (params.author && params.quote) {
-  add(params)
-  list((err) => {
-    if (err) console.error(err)
-    client.quit()
-  })
-  return
-}
-
-if (params.author) { 
-  list((err) => {
-    if (err) console.error(err)
-    client.quit()
-  })
-  return
-}
-
-client.quit()
-
-function add ({author, quote}) {
-  const key = `Quotes: ${uuid()}`
-  client.hmset(key, {author, quote})
-  client.sadd(`Author: ${params.author}`, key)
-}
-
-function list (cb) {
-  client.smembers(`Author: ${params.author}`, (err, keys) => {
-    if (err) return cb(err)
-    steed.each(keys, (key, next) => {
-      client.hgetall(key, (err, {author, quote}) => {
-        if (err) return next(err)
-        console.log(`${author} ${quote} \n`)
-        next()
-      })
-    }, cb)
-  })
-}

Chapter06/redis/redis-app/package.json

@@ -1,17 +0,0 @@
-{
-  "name": "redis-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "redis": "^2.7.1",
-    "steed": "^1.1.3",
-    "uuid": "^3.0.1"
-  }
-}

Chapter06/redis/redis-batch-app/index.js

@@ -1,56 +0,0 @@
-const uuid = require('uuid')
-const steed = require('steed')()
-const redis = require('redis') 
-const client = redis.createClient(), 
-const params = {
-  author: process.argv[2],
-  quote: process.argv[3]
-}
-
-if (params.author && params.quote) {
-  add(params, (err) => {
-    if (err) throw err
-    list((err) => {
-      if (err) console.error(err)
-      client.quit()
-    })
-  })
-  return
-}
-
-if (params.author) { 
-  list((err) => {
-    if (err) console.error(err)
-    client.quit()
-  })
-  return
-}
-
-client.quit()
-
-
-function add ({author, quote}, cb) {
-  const key = `Quotes: ${uuid()}`
-  client
-    .multi()
-    .hmset(key, {author, quote})
-    .sadd(`Author: ${params.author}`, key)
-    .exec((err, replies) => {
-      if (err) return cb(err)
-      if (replies[0] === "OK") console.log('Added...\n')
-      cb()
-    })   
-}
-
-function list (cb) {
-  client.smembers(`Author: ${params.author}`, (err, keys) => {
-    if (err) return cb(err)
-    steed.each(keys, (key, next) => {
-      client.hgetall(key, (err, {author, quote}) => {
-        if (err) return next(err)
-        console.log(`${author} ${quote} \n`)
-        next()
-      })
-    }, cb)
-  })
-}

Chapter06/redis/redis-batch-app/package.json

@@ -1,17 +0,0 @@
-{
-  "name": "redis-app",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "redis": "^2.7.1",
-    "steed": "^1.1.3",
-    "uuid": "^3.0.1"
-  }
-}