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submission.js
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submission.js
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'use strict';
const { parseLine } = require('./utils');
const submission = ({ inputDataSet, submittedDataSet, outputToFile }) => {
function createError(message, lineNumber) {
return new Error(`Invalid submission: ${message} at line ${lineNumber}`);
}
function parseInputDataSet(data) {
const dataset = {
numContributors: 0,
numProjects: 0,
contributors: {},
projects: {},
numTimesContributorsGotMentored: 0,
numTimesContributorsIncreasedSkillLevel: 0,
numContributorsWorkedOnProjects: 0,
};
const lines = data.split('\n');
const [numContributors, numProjects] = parseLine(lines[0], [0, 1]);
let currentLine = 1;
dataset.numContributors = numContributors;
dataset.numProjects = numProjects;
for (let i = 0; i < numContributors; i++) {
const [name, numSkills] = parseLine(lines[currentLine++], [1]);
dataset.contributors[name] = {
availableFrom: 0, waitingDays: 0, skills: {},
};
for (let j = 0; j < numSkills; j++) {
const [skillName, level] = parseLine(lines[currentLine + j], [1]);
dataset.contributors[name].skills[skillName] = level;
}
currentLine += numSkills;
}
for (let i = 0; i < numProjects; i++) {
const [
name, numDays, score, bestBeforeDay, numRoles,
] = parseLine(lines[currentLine++], [1, 2, 3, 4]);
dataset.projects[name] = {
numDays, score, bestBeforeDay, numRoles, skills: [],
};
for (let j = 0; j < numRoles; j++) {
const [skillName, level] = parseLine(lines[currentLine + j], [1]);
dataset.projects[name].skills.push({ name: skillName, level });
}
currentLine += numRoles;
}
return dataset;
}
function parseSubmittedDataSet(dataset, submittedData) {
if (submittedData === '') {
throw new Error('File is empty');
}
const lines = submittedData.split('\n');
let currentLine = 0;
let line = lines[currentLine++].trim();
if (!line.length) {
throw new Error(`Invalid submission: Line ${currentLine} is empty`);
}
if (isNaN(line)) {
throw createError(`Can't parse integer value (${line})`, currentLine);
}
const numExecutedProjects = +line;
if (numExecutedProjects > dataset.numProjects) {
throw createError([
`The number of completed projects is ${numExecutedProjects}`,
`instead of being between 0 and ${dataset.numProjects}`,
].join(' '), currentLine);
}
for (let i = 0; i < numExecutedProjects; i++) {
line = lines[currentLine++];
if (typeof line === 'undefined') {
throw createError([
'Submission file has fewer lines than expected.',
'Unexpected EOF (end of file)',
].join(' '), currentLine);
}
const projectName = line.trim();
if (!projectName.length) {
throw new Error(`Invalid submission: Line ${currentLine} is empty`);
}
const project = dataset.projects[projectName];
if (!project) {
throw createError(`Project "${projectName}" does not exist`, currentLine);
}
if (typeof project.receivedScore !== 'undefined') {
throw createError(`Project ${projectName} is listed twice`, currentLine);
}
line = lines[currentLine++];
if (typeof line === 'undefined') {
throw createError([
'Submission file has fewer lines than expected.',
'Unexpected EOF (end of file)',
].join(' '), currentLine);
}
const contributorNames = parseLine(line);
const numContributors = contributorNames.length;
if (!numContributors) {
throw new Error(`Invalid submission: Line ${currentLine} is empty`);
}
if (numContributors !== project.numRoles) {
throw createError([
`The number of listed contributors for project ${projectName}`,
`is ${numContributors} instead of ${project.numRoles}`,
].join(' '), currentLine);
}
const duplicatedNames = contributorNames.filter((name, idx, array) =>
array.indexOf(name) !== idx
);
if (duplicatedNames.length) {
throw createError([
`Contributor ${duplicatedNames[0]} is listed for more than one role`,
`in project ${projectName}`,
].join(' '), currentLine);
}
const nonExistentContributor = contributorNames.find(name =>
!dataset.contributors[name]
);
if (nonExistentContributor) {
throw createError(
`Contributor "${nonExistentContributor}" does not exist`, currentLine
);
}
dataset.numContributorsWorkedOnProjects += numContributors;
const contributorsAreAvailableFrom = Math.max(...contributorNames.map(
name => dataset.contributors[name].availableFrom
));
const endedOn = contributorsAreAvailableFrom + project.numDays;
for (let j = 0; j < numContributors; j++) {
const name = contributorNames[j];
const contributor = dataset.contributors[name];
const { name: skill, level } = project.skills[j];
const mentored = (contributor.skills[skill] || 0) === level - 1 &&
contributorNames.some(contributorName =>
dataset.contributors[contributorName].skills[skill] >= level
);
if (contributor.skills[skill] >= level || mentored) {
if ((contributor.skills[skill] || 0) <= level) {
contributor.skills[skill] ??= 0;
contributor.skills[skill]++;
dataset.numTimesContributorsIncreasedSkillLevel++;
}
if (mentored) {
dataset.numTimesContributorsGotMentored++;
}
contributor.waitingDays += contributorsAreAvailableFrom - contributor.availableFrom;
contributor.availableFrom = endedOn;
continue;
}
const highestSkillLevel = Math.max(...contributorNames.map(
contributorName => dataset.contributors[contributorName].skills[skill] || 0
));
throw createError([
`Project ${projectName} cannot be completed because contributor`,
`${name} has the ${skill} skill at level ${contributor.skills[skill] || 0},`,
`while the ${skill} skill at level ${level} is required.`,
`The highest ${skill} skill level among contributors on this project is`,
`${highestSkillLevel}`,
].join(' '), currentLine);
}
const lateBy = Math.max(0, endedOn - project.bestBeforeDay);
project.receivedScore = Math.max(0, project.score - lateBy);
}
if (typeof lines[currentLine] !== 'undefined' && lines[currentLine].trim().length) {
throw createError(
`Expected end of file, got: ${lines[currentLine]}`, currentLine + 1
);
}
return dataset;
}
function createInsights(dataset) {
const noColor = +outputToFile === 1;
const yellow = value => noColor ? value : `\u001B[33m${value}\u001B[0m`;
const formatNumber = value => yellow(value.toLocaleString('en-US'));
const toPercentage = value => yellow(
`${(value * 100).toString().match(/^-?([\d][^.]*)/)[0]}%`
);
const {
numContributors, numProjects, contributors, projects,
numTimesContributorsGotMentored, numTimesContributorsIncreasedSkillLevel,
numContributorsWorkedOnProjects,
} = dataset;
const projectNames = Object.keys(projects);
const contributorNames = Object.keys(contributors);
const completedProjects = projectNames.filter(name =>
typeof projects[name].receivedScore !== 'undefined'
);
const numProjectsCompleted = completedProjects.length;
const {
score, numProjectsBestBeforeDay, numProjectsCompletedTooLong,
} = completedProjects.reduce((sum, name) => {
const project = projects[name];
sum.score += project.receivedScore;
sum.numProjectsBestBeforeDay += project.receivedScore === project.score;
sum.numProjectsCompletedTooLong += project.receivedScore === 0;
return sum;
}, { score: 0, numProjectsBestBeforeDay: 0, numProjectsCompletedTooLong: 0 });
const averageWaitingDays = (contributorNames.reduce(
(sum, name) => sum + contributors[name].waitingDays, 0
) / numContributorsWorkedOnProjects || 0).toFixed(2);
const numContributorsWorked = contributorNames.filter(name =>
contributors[name].availableFrom > 0
).length;
return {
score,
toString: () => [
`Score: ${formatNumber(score)}`,
'Insights about this submission:',
[
[
`- projects completed: ${formatNumber(numProjectsCompleted)}`,
`(${toPercentage(numProjectsCompleted / numProjects)} of all projects)`,
].join(' '),
[
'- projects completed before their "best before" time in days',
`(scoring full points): ${formatNumber(numProjectsBestBeforeDay)}`,
`(${toPercentage(numProjectsBestBeforeDay / numProjects)} of all projects)`,
].join(' '),
[
'- projects completed but scoring 0 points (because they were',
'completed too long after their "best before" time):',
formatNumber(numProjectsCompletedTooLong),
`(${toPercentage(numProjectsCompletedTooLong / numProjects)} of all projects)`,
].join(' '),
[
'- number of times a contributor got mentored on a project:',
formatNumber(numTimesContributorsGotMentored),
].join(' '),
[
'- number of times a contributor increased their skill level thanks to',
`completing a project: ${formatNumber(numTimesContributorsIncreasedSkillLevel)}`,
].join(' '),
[
'- contributors were waiting for their next project to start',
`${formatNumber(averageWaitingDays)} days on average`,
].join(' '),
[
`- ${formatNumber(numContributorsWorked)} contributors out of`,
`${formatNumber(numContributors)} worked on at least one project`,
].join(' '),
].join('\n'),
].join('\n\n'),
};
}
function evaluate() {
const dataset = parseInputDataSet(inputDataSet);
return createInsights(parseSubmittedDataSet(dataset, submittedDataSet));
}
return { evaluate };
};
module.exports = submission;