Day 19: Aplenty
I found this quite difficult although have solved part one after quite a while. The problem seemed simple enough but once I got into the details of the code it became quite confusing and muddled, with naming as well. After a long time looking deeply at an aspect of the code it is easy to get hypnotised and confused. It might also be because it is Christmas and people are talking around me. It is a bit difficult to focus, but in general I need to get better at not getting confused with this kind of problem, and start learning about automated testing in the new year.
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const inputToUse = realInput;
const inputLines = inputToUse.split(/\n/);
// console.log('inputLines',inputLines);
var workflowsLogged = false;
const workflows = [];
const parts = [];
inputLines.forEach(function(line){
const cleanLine = line.trim();
// console.log('cleanLine',cleanLine);
if( !cleanLine.length ) {
workflowsLogged = true;
} else {
if( workflowsLogged ) {
// ! - it's a part
const trimLine = cleanLine.slice(1,cleanLine.length-1);
// console.log('trimLine',trimLine);
// partLines.push(trimLine);
const partStatLines = trimLine.split(',');
// console.log('partStatLines',partStatLines);
let statObj = {};
partStatLines.forEach(function(statLine) {
const statArr = statLine.split('=');
// console.log('statArr',statArr);
statObj = {
...statObj,
[statArr[0]]:statArr[1]
}
});
// console.log('statObj',statObj);
parts.push(statObj);
} else {
// ! - it's a workflow
// workflowLines.push(cleanLine);
const workflowArr = cleanLine.split('{');
const name = workflowArr[0];
const wfLine = workflowArr[1].slice(0, workflowArr[1].length-1);
// console.log('wfLine',wfLine);
const rulesArr = wfLine.split(',');
const wfRules = [];
// console.log('rules',rules);
rulesArr.forEach(function(rule){
// console.log('rule',rule);
var wf = {};
if( rule.includes(':') ) {
const ruleArr = rule.split(':');
// console.log('ruleArr',ruleArr);
const condition = ruleArr[0];
var condObj = {};
if( condition.includes('>') || condition.includes('<') ) {
let conditionName = '';
let conditionType = '';
let conditionValue = '';
if( condition.includes('>') ) {
conditionType = '>';
const arr = condition.split('>');
conditionName = arr[0];
conditionValue = arr[1];
} else {
conditionType = '<';
const arr = condition.split('<');
conditionName = arr[0];
conditionValue = arr[1];
}
condObj = {
conditionName: conditionName,
type: conditionType,
value: conditionValue
}
}
// console.log('condObj',condObj);
const outcome = ruleArr[1];
// console.log('outcome',outcome);
wf = {
condition: condObj,
outcome: outcome
}
} else {
wf = {
outcome:rule
}
}
wfRules.push(wf);
});
const wfObj = {
name: name,
rules: wfRules
}
workflows.push(wfObj);
}
}
});
console.log('workflows',workflows);
console.log('parts',parts);
const acceptedParts = [];
parts.forEach(function(part){
// console.log('---- NEW PART');
console.log(part);
var inLimbo = true;
var currentWorkflowName = 'in';
const passedThru = [];
while( inLimbo ) {
// console.log('currentWorkflowName',currentWorkflowName);
passedThru.push(currentWorkflowName);
// find workflow with current name
const currentWorkflow = Object.values(workflows).find((obj) => {
return obj.name === currentWorkflowName
});
// console.log('currentWorkflow',currentWorkflow);
const rules = currentWorkflow.rules;
for( var i=0; i<rules.length; i++ ) {
const rule = rules[i];
console.log('NEW rule',rule);
const condition = rule.condition;
// console.log('condition',condition);
if( condition ) {
const conditionName = condition.conditionName;
const ruleType = condition.type;
console.log('ruleType',ruleType);
const ruleVal = parseFloat(condition.value);
console.log('ruleVal',ruleVal);
const partValue = parseFloat(part[conditionName]);
console.log('partValue',partValue);
if( ruleType === '>' ) {
if( partValue > ruleVal ) {
const outcome = rule.outcome;
if( outcome === 'R' ) {
console.log('REJECTED');
inLimbo = false;
break;
} else if( outcome === 'A' ) {
console.log('ACCEPTED');
acceptedParts.push(part);
inLimbo = false;
break;
} else {
currentWorkflowName = outcome;
break;
}
}
} else if( ruleType === '<' ) {
if( partValue < ruleVal ) {
const outcome = rule.outcome;
if( outcome === 'R' ) {
console.log('REJECTED');
inLimbo = false;
break;
} else if( outcome === 'A' ) {
console.log('ACCEPTED');
acceptedParts.push(part);
inLimbo = false;
break;
} else {
currentWorkflowName = outcome;
break;
}
}
}
} else {
const outcome = rule.outcome;
// console.log('outcome', outcome);
if( outcome === 'R' ) {
inLimbo = false;
break;
} else if( outcome === 'A' ) {
acceptedParts.push(part);
inLimbo = false;
break;
} else {
currentWorkflowName = outcome;
break;
}
}
}
}
console.log('passedThru',passedThru);
});
console.log('acceptedParts',acceptedParts);
var ratingTotal = 0;
acceptedParts.forEach(function(part) {
var partTotal = 0;
for( const [key, value] of Object.entries(part) ) {
const val = parseFloat(value);
partTotal = partTotal + val;
}
// console.log('partTotal', partTotal);
ratingTotal = ratingTotal + partTotal;
});
console.log('ratingTotal',ratingTotal);