Code files

Chapter06/level/level-app/index.js

@@ -0,0 +1,45 @@
+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

@@ -0,0 +1,18 @@
+{
+  "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

@@ -0,0 +1,45 @@
+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

@@ -0,0 +1,20 @@
+{
+  "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

@@ -0,0 +1,17 @@
+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

@@ -0,0 +1,39 @@
+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

@@ -0,0 +1,15 @@
+{
+  "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

@@ -0,0 +1,52 @@
+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

@@ -0,0 +1,42 @@
+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

@@ -0,0 +1,15 @@
+{
+  "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

@@ -0,0 +1,34 @@
+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

@@ -0,0 +1,15 @@
+{
+  "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

@@ -0,0 +1,51 @@
+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

@@ -0,0 +1,15 @@
+{
+  "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

@@ -0,0 +1,46 @@
+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

@@ -0,0 +1,16 @@
+{
+  "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

@@ -0,0 +1,46 @@
+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

@@ -0,0 +1,19 @@
+{
+  "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

@@ -0,0 +1,51 @@
+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

@@ -0,0 +1,16 @@
+{
+  "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

@@ -0,0 +1,46 @@
+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

@@ -0,0 +1,17 @@
+{
+  "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

@@ -0,0 +1,56 @@
+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

@@ -0,0 +1,17 @@
+{
+  "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"
+  }
+}