Day 4

04/part1.js

@@ -0,0 +1,53 @@
+const fs = require('fs')
+const readline = require('readline');
+
+const readInterface = readline.createInterface({
+    input: fs.createReadStream('input'),
+    console: false
+});
+
+
+let passports = [];
+let cPass = {};
+
+readInterface.on('line', function(line) {
+  if (line.length == 0) {
+    passports.push(cPass);
+    cPass = {};
+    return;
+  }
+
+  line.split(' ').forEach(function(kv) {
+    parts = kv.split(':');
+    cPass[parts[0]] = parts[1];
+  });
+
+//  console.log(cPass);
+});
+
+let required = new Set(['byr', 'iyr', 'eyr', 'hgt', 'hcl', 'ecl', 'pid' ]);
+let optional = new Set([ 'cid' ]);
+
+readInterface.on('close', function(line) {
+  // Save the last passport if it has any fields
+  if (Object.keys(cPass).length > 0) {
+    passports.push(cPass);
+  }
+
+  let count = 0;
+  passports.forEach(function(passport) {
+    let keys = new Set(Object.keys(passport));
+    let missing = new Set([...required].filter(x => !keys.has(x)))
+
+    console.log(passport);
+    console.log(missing);
+    console.log("");
+
+    if (missing.size == 0) {
+      count++;
+    }
+  });
+  
+  console.log(count);
+});
+

04/part2.js

@@ -0,0 +1,99 @@
+const fs = require('fs')
+const readline = require('readline');
+
+const readInterface = readline.createInterface({
+    input: fs.createReadStream('input'),
+    console: false
+});
+
+
+let passports = [];
+let cPass = {};
+
+readInterface.on('line', function(line) {
+  if (line.length == 0) {
+    passports.push(cPass);
+    cPass = {};
+    return;
+  }
+
+  line.split(' ').forEach(function(kv) {
+    parts = kv.split(':');
+    cPass[parts[0]] = parts[1];
+  });
+
+//  console.log(cPass);
+});
+
+let required = new Set(['byr', 'iyr', 'eyr', 'hgt', 'hcl', 'ecl', 'pid' ]);
+let optional = new Set([ 'cid' ]);
+
+function validKeys(passport) {
+  let keys = new Set(Object.keys(passport));
+  let missing = new Set([...required].filter(x => !keys.has(x)))
+
+  return missing.size == 0;
+}
+
+function validBYR(passport) {
+  let byr = Number(passport['byr']);
+
+  return byr >= 1920 && byr <= 2002;
+}
+
+function validIYR(passport) {
+  let iyr = Number(passport['iyr']);
+
+  return iyr >= 2010 && iyr <= 2020;
+}
+
+function validEYR(passport) {
+  let eyr = Number(passport['eyr']);
+
+  return eyr >= 2020 && eyr <= 2030;
+}
+
+function validHGT(passport) {
+  if (!passport.hasOwnProperty('hgt')) {
+    return false;
+  }
+
+  let hgt = parseInt(passport['hgt']);
+
+  if (passport['hgt'].endsWith('cm')) {
+    return hgt >= 150 && hgt <= 193;
+  }
+
+  // inches
+  return hgt >= 59 && hgt <= 76;
+}
+
+const validHCLs = /^#[a-f0-9]{6}$/;
+function validHCL(passport) {
+  return validHCLs.test(passport['hcl']);
+}
+
+const validECLs = new Set(['amb', 'blu', 'brn', 'gry', 'grn', 'hzl', 'oth']);
+function validECL(passport) {
+  return validECLs.has(passport['ecl']);
+}
+
+const validPIDs = /^[0-9]{9}$/
+function validPID(passport) {
+  return validPIDs.test(passport['pid']);
+}
+
+function valid(p) {
+  return (validKeys(p) && validBYR(p) && validIYR(p) && validEYR(p) && validHGT(p) && validHCL(p) && validECL(p) && validPID(p));
+}
+
+readInterface.on('close', function(line) {
+  // Save the last passport if it has any fields
+  if (Object.keys(cPass).length > 0) {
+    passports.push(cPass);
+  }
+
+  let count = passports.filter(valid).length;
+  console.log(count);
+});
+