Week 259

1 files changed, 134 insertions, 0 deletions

diff --git a/challenge-259/zapwai/javascript/ch-1.js b/challenge-259/zapwai/javascript/ch-1.js
new file mode 100644
index 0000000000..662affe7cc
--- /dev/null
+++ b/challenge-259/zapwai/javascript/ch-1.js
@@ -0,0 +1,134 @@
+let base_year = 2000;
+let days_in_month = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
+let days = ["sat", "sun", "mon", "tue", "wed", "thu", "fri"];
+
+function is_leap_year(year) {
+    if (year % 400 == 0) {
+	return true;
+    }
+    if (year % 100 == 0) {
+	return false;
+    }
+    if (year % 4 == 0) {
+	return true;
+    }
+    return false;
+}
+
+function weekday(year, month, day) {
+    let skip_days = year - base_year;
+    for (let yr = base_year; yr < year; yr++) {
+	if (is_leap_year(yr)) {
+	    skip_days++;
+	}
+    }
+    if (is_leap_year(year) && month > 2) {
+	skip_days++;
+    }
+    for (let m = 1; m < 13; m++) {
+	if (m < month) {
+	    skip_days += days_in_month[m-1];
+	}
+    }
+    skip_days += day - 1;
+    return days[skip_days % 7];
+}
+
+function is_weekend(year, month, day) {
+    let today = weekday(year, month, day);
+    if (today == "sat" || today == "sun") {
+	return true;
+    }
+    return false;
+}
+
+function is_holiday(bank_holidays, year, month, day) {
+    let date = format_date(year, month, day);
+    for (let hol in bank_holidays) {
+	if (hol == date) {
+	    return true;
+	}
+    }
+    return false;
+}
+
+function format_date(year, month, day) {
+    let yr = year.toString();
+    let mn = month.toString().padStart(2,'0');
+    let da = day.toString().padStart(2,'0');
+    return yr+"-"+mn+"-"+da;
+}
+
+function parse_date(date) {
+    let year = "";
+    let month = "";
+    let day = "";
+    for (let d of date) {
+	if (d == "-") {
+	    continue;
+	}
+	if (year.length < 4) {
+	    year += d;
+	} else if (month.length < 2) {
+	    month += d;
+	} else if (day.length < 2) {
+	    day += d;
+	}
+    }
+    yr = year;
+    mth = month;
+    da = day;
+    return [yr, mth, da];
+}
+
+function proc(start_date, offset, bank_holidays) {
+    let result = parse_date(start_date);
+    let year = result[0];
+    let month = result[1];
+    let day = result[2];
+    let new_year = year;
+    let new_month = month;
+    let new_day = day;
+    let steps = offset;
+    while (steps > 0) {
+	let leap = 0;
+	if (is_leap_year(new_year) && (new_month == 2)) {
+	    leap = 1;
+	}
+	if (new_day + 1 > days_in_month[new_month - 1] + leap) {
+	    if (new_month == 12) {
+		new_year++;
+	    }
+	    new_month++;
+	    if (new_month == 13) {
+		new_month = 1;
+	    }
+	    new_day = 1;
+	} else {
+	    new_day++;
+	}
+	if (!(is_holiday(bank_holidays, new_year, new_month, new_day)) && !(is_weekend(new_year,new_month,new_day))) {
+	    steps--;
+	}
+    }
+    let new_date = format_date(new_year, new_month, new_day);
+    console.log("Input:", start_date, "offset:", offset);
+    if (bank_holidays.length > 0) {
+	for (let h of bank_holidays) {
+	    console.log("\tHoliday:",h);
+	}
+    }
+    console.log("Output:", new_date);
+}
+
+function mn() {
+    let start_date = "2018-06-28";
+    let offset = 3;
+
+    let bank_holiday1 = "2018-07-03";
+    let bank_holidays = [bank_holiday1];
+
+    proc(start_date, offset, bank_holidays);
+}
+
+mn();