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/*let i = 0;
let foodShiftNames = [];
let db = []; // first level array: days - second level array: shifts - third level dict: course/teacher - fourth level array: indexes
while (db.length < weekdays.length)
{
i = findExpression(data, weekdays[db.length], i);
let end = i;
if (db.length === weekdays.length)
end = data.length;
else
end = findExpression(data, weekdays[db.length + 1], i + 1);
db.push([]); // add the day
let shifts = 0;
do
{
let teachers = [];
let courses = [];
i = findExpression(data, "RUOKAILUVUORO", i);
let nextLineStart = getNextChar(data, i, "\n");
foodShiftNames.push(data.substring(i, nextLineStart));
db[db.length - 1].push([]); // add the food shift
nextLineStart = getNextChar(data, nextLineStart + 1, "\n");
while (!((nextLineStart - i) > 2))
{
i = nextLineStart;
nextLineStart = getNextChar(data, i + 1, "\n");
}
let parsedLine = data.substring(i, nextLineStart).replaceAll(",", "").replaceAll("ja ", "");
let parse_i = 0;
let nextSpace = getNextChar(parsedLine, parse_i, " ");
while (parse_i !== -1)
{
courses.push(parsedLine.substring(parse_i, nextSpace));
parse_i = nextSpace + 1;
nextSpace = getNextChar(parsedLine, parse_i, " ");
teachers.push(parsedLine.substring(parse_i, nextSpace));
parse_i = nextSpace + 1;
nextSpace = getNextChar(parsedLine, parse_i, " ");
}
i = nextLineStart;
db[db.length - 1][shifts][0] = courses;
db[db.length - 1][shifts][1] = teachers;
shifts++;
} while ((i < end) && (i !== -1))
i = getNextChar("\n");
}
return [db, foodShiftNames];*/
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 (!(Number.isInteger(start) && (start >= 0)))
throw new TypeError("Start must be a positive integer!");
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 parseLine(line, toRemove = " ja KAHDEN TUTKINNON OPINNOT 1., 2. ja 3. VUOSITASON RYHMÄT ")
{
let i = 0;
let courses = [];
let teachers = [];
let nextSpace = 0;
if (line.substring(line.length - toRemove.length, line.length) === toRemove)
line = line.substring(0, line.length - toRemove.length);
line = line.replaceAll(",", "").replaceAll("ja ", "");
const getElement = list =>
{
nextSpace = getNextChar(line, " ", i);
if (nextSpace === -1)
nextSpace = line.length;
list.push(line.substring(i, nextSpace));
i = nextSpace + 1;
}
do
{
getElement(courses);
getElement(teachers);
} while (i < line.length)
return [courses, teachers];
}
function parseDay(day)
{
let shifts = {};
let i = getToLineStartingWith(day, "RUOKAILUVUORO");
do
{
let endOfLine = getNextChar(day, "\n", i);
let shiftDesc = day.substring(i, endOfLine);
i = getNextChar(day, "\n", i) + 1;
i = getNextChar(day, "\n", i) + 1;
if (getNextChar(day, "\n", i) === -1)
endOfLine = day.length;
else
endOfLine = getNextChar(day, "\n", i);
let unparsedIndexes = day.substring(i, endOfLine);
shifts[shiftDesc] = parseLine(unparsedIndexes);
i = getToLineStartingWith(day, "RUOKAILUVUORO", i);
} while (i !== -1);
return shifts;
}
function parseShift(data, weekdays = ["MAANANTAISIN", "TIISTAISIN", "KESKIVIIKKOISIN", "TORSTAISIN", "PERJANTAISIN"])
{
let i = 0;
let db = [];
while (db.length < weekdays.length)
{
let day = [];
i = getNextChar(data, "\n", findExpression(data, weekdays[db.length]));
let end;
if (db.length === weekdays.length - 1)
end = data.length;
else
end = findExpression(data, weekdays[db.length + 1]);
let unparsedDay = data.substring(i + 1, end);
day = parseDay(unparsedDay);
db.push(day);
}
return db;
}
/*
* DB structure:
* list
* WEEKDAY - list
* FOOD SHIFTS - dict
* COURSE INDEXES - list
* TEACHER INDEXES - list
*/
function getShift(day, index, db) // day: int, 1 = monday; index: string of course/teacher; db: parsed shifts
{
if ((typeof day !== "number") || isNaN(day) || (typeof index !== "string"))
return -1;
let shifts = db[day - 1];
let _endOfIndex = parseInt(index.substring(2, 4));
let is_teacher = _endOfIndex.toString() !== index.substring(2, 4);
let is_course = !is_teacher;
for (const [key, val] of Object.entries(shifts))
{
let indexes = val[+is_teacher];
for (let i = 0; i < indexes.length; i++)
{
if (indexes[i] === index)
return key;
}
}
return -1;
}
exports.build = parseShift;
exports.get = getShift;
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