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const weekdayToNumber = require("./Functions/dateFuncs.js").weekdayToNumber;
function getCharAmount(s, c)
{
let n = 0;
for (let c_i = 0; c_i < s.length; c_i++)
{
n += +(s[c_i] === c);
}
return n;
}
function getNextChar(s, c, i = 0)
{
if (!(Number.isInteger(i) && (i >= 0)))
return -1;
for (; i < s.length; i++)
{
if (s[i] === c)
return i;
}
return -1;
}
function getNextLine(s, i)
{
i = getNextChar(s, "\n", i);
i += +(i !== -1) * 1;
return i;
}
function getToLineStartingWith(s, ss, start = 0)
{
if (!(Number.isInteger(start) && (start >= 0)))
return -1
let i = start;
do
{
if (s.substring(i, i + ss.length) === ss)
break;
i = getNextLine(s, i);
} while(i !== -1)
return i;
}
function findExpression(data, expr, start = 0)
{
if (start == -1)
return -1;
if (!(Number.isInteger(start) && (start >= 0)))
throw new TypeError("Start must be a positive integer!");
if (typeof expr !== "string")
return -1;
while ((data.substring(start, start + expr.length) !== expr) && (start + expr.length < data.length))
start++;
if (data.substring(start, start + expr.length) !== expr)
return -1;
return start;
}
function parseCluttered(s)
{
if (!(typeof s === "string"))
return "";
return s.replaceAll(".", "").replaceAll(" ", "").toUpperCase();
}
async function writeShifts(data, DB)
{
let deletions = await Promise.all([
DB.query_raw("DELETE FROM shifts"),
DB.query_raw("DELETE FROM shiftnames")
]);
data = data.replace(/RUOKAILUVUOROT.*/, "");
const dbOperations = [];
const shiftRegex = /((?:MAANANTAI|TIISTAI|KESKIVIIKKO|TORSTAI|PERJANTAI)?.*)\s*(RUOKAILU.*)\s*(.*)/gmi;
const shifts = data.matchAll(shiftRegex);
let weekday;
let shiftId = 1;
for(const shift of shifts)
{
if (shift[1] !== "")
{
weekday = weekdayToNumber(shift[1]);
shiftId = 1;
}
dbOperations.push(
writeShift(weekday, shiftId, shift[2], shift[3], DB)
);
shiftId++;
}
await dbOperations;
return 0;
}
async function writeShift(weekday, shiftId, shiftLine, courseLine, DB)
{
const dbOperations = [];
// Shift names
dbOperations.push(
DB.execute(
"INSERT INTO shiftnames VALUE (?, ?, ?)",
[weekday, shiftId, shiftLine]
)
);
// Shift contents
const courseRegex = /([A-ZÅÄÖ]{2,3}\d{2,3})(?:\+([A-ZÅÄÖ]{2,3}\d{2,3}))?(?: ([A-ZÅÄÖ]{4}))?/gi;
const courses = courseLine.matchAll(courseRegex);
for(const course of courses)
{
const courseName1 = course[1];
const courseName2 = course[2]; // this exists if the course is like MA11+MA12 RIHO
const teacher = course[3] || null;
// Get the class
let className1 = await DB.execute(
"SELECT class FROM classes WHERE course=?",
[courseName1]
);
className1 = className1[0];
if (className1 !== undefined)
className1 = className1.class;
else
className1 = null;
let className2 = undefined;
if (courseName2 !== undefined) {
className2 = await DB.execute(
"SELECT class FROM classes WHERE course=?",
[courseName2]
);
className2 = className2[0];
if (className2 !== undefined)
className2 = className2.class;
else
className2 = null;
}
// Add the info
dbOperations.push(DB.execute(
`INSERT IGNORE INTO shifts VALUES (${weekday}, ${shiftId}, ?, ?, ?)`,
[courseName1, teacher, className1]
));
if (courseName2 !== undefined) {
dbOperations.push(DB.execute(
`INSERT IGNORE INTO shifts VALUES (${weekday}, ${shiftId}, ?, ?, ?)`,
[courseName2, teacher, className2]
));
}
}
await Promise.all(dbOperations);
return 0;
}
async function getShift(day, index, DB)
{
let shift = DB.execute("SELECT name FROM shiftnames WHERE day = ? and id = (SELECT shift FROM shifts WHERE (day = ?) AND (course = ? OR teacher = ? OR class = ?) LIMIT 1)", [day, day, index, index, index]);
let additional = DB.execute("SELECT course, teacher, class FROM shifts WHERE (day = ?) AND (course = ? OR teacher = ? OR class = ?)", [day, index, index, index]);
[shift, additional] = await Promise.all([shift, additional]);
if (shift.length !== 0)
{
shift.push(additional);
return shift;
}
return undefined;
}
function getIndexType(index)
{
if (/^[A-Za-zåäöÅÄÖ]{2,3}\d{2,3}$/.test(index))
return "course";
if (/^[A-Za-zåäöÅÄÖ]{4}$/.test(index))
return "teacher";
if (/^\w\d{3}R?$/.test(index))
return "class";
}
function randInt(start, stop)
{
return start + Math.floor(Math.random() * (stop - start));
}
async function getRandomIndex(day, DB, depth=0)
{
if (depth > 10)
return null;
let indexes = await DB.execute("SELECT course, teacher, class FROM shifts WHERE day = ? ORDER BY RAND() LIMIT 1", [day]);
indexes = Object.values(indexes[0] || [null, null, null]);
let start = randInt(0, indexes.length);
for (let test = 0; test < 3; test++)
{
let i = (start + test) % indexes.length;
if (indexes[i] !== null)
return indexes[i];
}
console.log("Warning: row without class/teacher/course in database!");
return getRandomIndex(day, DB, depth + 1);
}
exports.indexType = getIndexType;
exports.cluttered = parseCluttered;
exports.build = writeShifts;
exports.get = getShift;
exports.randomIndex = getRandomIndex;
exports.find = findExpression;
exports.getNextChar = getNextChar;
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