From aa6892b05d73b5c0879635831a81611cefe354db Mon Sep 17 00:00:00 2001
From: Prabin Dahal <prabin.dahal@hs-offenburg.de>
Date: Fri, 22 Nov 2024 11:32:52 +0100
Subject: [PATCH] Initial commit

---
 calendar.js    | 325 +++++++++++++++++++++++++++++++++++++++++++++++++
 extension.js   |  76 ++++++++++++
 metadata.json  |  10 ++
 stylesheet.css |   3 +
 4 files changed, 414 insertions(+)
 create mode 100644 calendar.js
 create mode 100644 extension.js
 create mode 100644 metadata.json
 create mode 100644 stylesheet.css

diff --git a/calendar.js b/calendar.js
new file mode 100644
index 0000000..85a5548
--- /dev/null
+++ b/calendar.js
@@ -0,0 +1,325 @@
+/* calendar.js
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *//*
+Converts a Gregorian date to Nepali.
+*/
+function toNepali(gy, gm, gd) {
+  if (Object.prototype.toString.call(gy) === '[object Date]') {
+    gd = gy.getDate()
+    gm = gy.getMonth() + 1
+    gy = gy.getFullYear()
+  }
+  return d2n(g2d(gy, gm, gd))
+}
+
+/*
+  Converts a Nepali date to Gregorian.
+*/
+function toGregorian(ny, nm, nd) {
+  return d2g(n2d(ny, nm, nd))
+}
+
+/*
+  Checks whether a Nepali date is valid or not.
+*/
+function isValidNepaliDate(ny, nm, nd) {
+  return ny >= 2000 && ny <= 2099 &&
+    nm >= 1 && nm <= 12 &&
+    nd >= 1 && nd <= nepaliMonthLength(ny, nm)
+}
+
+/*
+  Is this a leap year or not?
+*/
+function isLeapNepaliYear(ny) {
+  return (nepaliCalendarData.leapYears.indexOf(ny) != -1);
+}
+
+/*
+  Number of days in a given month in a Nepali year.
+*/
+function nepaliMonthLength(ny, nm) {
+  return nepaliCalendarData[ny][nm - 1];
+}
+
+/*
+  Converts a date of the Nepali calendar to the Julian Day number.
+
+  @param ny Nepali year (1 to 3100)
+  @param nm Nepali month (1 to 12)
+  @param nd Nepali day (1 to 29/31)
+  @return Julian Day number
+*/
+function n2d(ny, nm, nd) {
+  i = ly = nepaliCalendarData.startYear;
+  d = nepaliCalendarData.startJulianDay - 1;
+  ly = nepaliCalendarData.leapYears[0];
+  for (j = 1; j < nepaliCalendarData.leapYears.length; j++) {
+    if (ly > ny) break;
+    d += (ly - i) * 365;
+    d += 366;
+    i = ly + 1;
+    ly = nepaliCalendarData.leapYears[j]
+  }
+  if (ny - i > 1) d += (ny - i) * 365;
+  for (i = 1; i < nm; i++) {
+    d += nepaliCalendarData[ny][i - 1];
+  }
+  d += nd;
+  return d;
+}
+/*
+  Converts the Julian Day number to a date in the Nepali calendar.
+
+  @param jdn Julian Day number
+  @return
+    ny: Nepali year (1 to 3100)
+    nm: Nepali month (1 to 12)
+    nd: Nepali day (1 to 29/32)
+*/
+function d2n(jdn) {
+  jdn = jdn - nepaliCalendarData.startJulianDay - 1 + 2;
+  ny = ly = nepaliCalendarData.startYear;
+  d = td = jdn;
+  try {
+    for (i = 0; i < nepaliCalendarData.leapYears.length; i++) {
+      td -= (nepaliCalendarData.leapYears[i] - ny) * 365;
+      td -= 366;
+      if (td < 0) break;
+      d = td;
+      ny = nepaliCalendarData.leapYears[i] + 1;
+    }
+    while (d > 365) {
+      d -= 365;
+      ny++;
+    }
+    for (nm = 1; nm < 12; nm++) {
+      if (d > nepaliCalendarData[ny][nm - 1])
+        d -= nepaliCalendarData[ny][nm - 1];
+      else
+        break;
+    }
+    nd = d;
+
+    return {
+      ny: ny
+      , nm: nm
+      , nd: nd
+    }
+  }
+  catch (exception) {
+    return null;
+  }
+}
+/*
+  Calculates the Julian Day number from Gregorian or Julian
+  calendar dates. This integer number corresponds to the noon of
+  the date (i.e. 12 hours of Universal Time).
+  The procedure was tested to be good since 1 March, -100100 (of both
+  calendars) up to a few million years into the future.
+
+  @param gy Calendar year (years BC numbered 0, -1, -2, ...)
+  @param gm Calendar month (1 to 12)
+  @param gd Calendar day of the month (1 to 28/29/30/31)
+  @return Julian Day number
+*/
+function g2d(gy, gm, gd) {
+  var d = div((gy + div(gm - 8, 6) + 100100) * 1461, 4)
+    + div(153 * mod(gm + 9, 12) + 2, 5)
+    + gd - 34840408
+  d = d - div(div(gy + 100100 + div(gm - 8, 6), 100) * 3, 4) + 752
+  return d;
+}
+
+/*
+  Calculates Gregorian and Julian calendar dates from the Julian Day number
+  (jdn) for the period since jdn=-34839655 (i.e. the year -100100 of both
+  calendars) to some millions years ahead of the present.
+
+  @param jdn Julian Day number
+  @return
+    gy: Calendar year (years BC numbered 0, -1, -2, ...)
+    gm: Calendar month (1 to 12)
+    gd: Calendar day of the month M (1 to 28/29/30/31)
+*/
+function d2g(jdn) {
+  var j
+    , i
+    , gd
+    , gm
+    , gy
+  j = 4 * jdn + 139361631
+  j = j + div(div(4 * jdn + 183187720, 146097) * 3, 4) * 4 - 3908
+  i = div(mod(j, 1461), 4) * 5 + 308
+  gd = div(mod(i, 153), 5) + 1
+  gm = mod(div(i, 153), 12) + 1
+  gy = div(j, 1461) - 100100 + div(8 - gm, 6)
+  return {
+    gy: gy
+    , gm: gm
+    , gd: gd
+  }
+}
+
+/*
+  Utility helper functions.
+*/
+
+function div(a, b) {
+  return ~~(a / b)
+}
+
+function mod(a, b) {
+  return a - ~~(a / b) * b
+}
+
+/*
+  Nepali Calendar Data
+*/
+var nepaliCalendarData = {
+  "2000": [30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31],
+  "2001": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2002": [31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2003": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2004": [30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31],
+  "2005": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2006": [31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2007": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2008": [31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 29, 31],
+  "2009": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2010": [31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2011": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2012": [31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30],
+  "2013": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2014": [31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2015": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2016": [31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30],
+  "2017": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2018": [31, 32, 31, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2019": [31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31],
+  "2020": [31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2021": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2022": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30],
+  "2023": [31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31],
+  "2024": [31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2025": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2026": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2027": [30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31],
+  "2028": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2029": [31, 31, 32, 31, 32, 30, 30, 29, 30, 29, 30, 30],
+  "2030": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2031": [30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31],
+  "2032": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2033": [31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2034": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2035": [30, 32, 31, 32, 31, 31, 29, 30, 30, 29, 29, 31],
+  "2036": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2037": [31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2038": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2039": [31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30],
+  "2040": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2041": [31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2042": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2043": [31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30],
+  "2044": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2045": [31, 32, 31, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2046": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2047": [31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2048": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2049": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30],
+  "2050": [31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31],
+  "2051": [31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2052": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2053": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30],
+  "2054": [31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31],
+  "2055": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2056": [31, 31, 32, 31, 32, 30, 30, 29, 30, 29, 30, 30],
+  "2057": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2058": [30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31],
+  "2059": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2060": [31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2061": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2062": [30, 32, 31, 32, 31, 31, 29, 30, 29, 30, 29, 31],
+  "2063": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2064": [31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2065": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2066": [31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 29, 31],
+  "2067": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2068": [31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2069": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2070": [31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30],
+  "2071": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2072": [31, 32, 31, 32, 31, 30, 30, 29, 30, 29, 30, 30],
+  "2073": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31],
+  "2074": [31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2075": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2076": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30],
+  "2077": [31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31],
+  "2078": [31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2079": [31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30],
+  "2080": [31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30],
+  "2081": [31, 31, 32, 32, 31, 30, 30, 30, 29, 30, 30, 30],
+  "2082": [30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 30, 30],
+  "2083": [31, 31, 32, 31, 31, 30, 30, 30, 29, 30, 30, 30],
+  "2084": [31, 31, 32, 31, 31, 30, 30, 30, 29, 30, 30, 30],
+  "2085": [31, 32, 31, 32, 30, 31, 30, 30, 29, 30, 30, 30],
+  "2086": [30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 30, 30],
+  "2087": [31, 31, 32, 31, 31, 31, 30, 30, 29, 30, 30, 30],
+  "2088": [30, 31, 32, 32, 30, 31, 30, 30, 29, 30, 30, 30],
+  "2089": [30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 30, 30],
+  "2090": [30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 30, 30],
+  "leapYears": [2003, 2007, 2011, 2015, 2019, 2023, 2026, 2030, 2034, 2038, 2042, 2046, 2050, 2054, 2057, 2061, 2065, 2069, 2073, 2077, 2081, 2085, 2087],
+  "startYear": 2000,
+  "endYear": 2090,
+  "startJulianDay": 2430829
+}
+
+function convertNumbers(string) {
+  const chars = {
+    '0': '०',
+    '1': '१',
+    '2': '२',
+    '3': '३',
+    '4': '४',
+    '5': '५',
+    '6': '६',
+    '7': '७',
+    '8': '८',
+    '9': '९',
+  }
+
+  return string.replace(/[0-9]/g, m => chars[m]);
+}
+
+function convertMonths(string) {
+  const chars = {
+    '1': 'बैशाख',
+    '2': 'जेष्ठ',
+    '3': 'आषाढ',
+    '4': 'श्रावण',
+    '5': 'भाद्र',
+    '6': 'आश्विन',
+    '7': 'कार्तिक',
+    '8': 'मंसिर',
+    '9': 'पौष',
+    '10': 'माघ',
+    '11': 'फाल्गुन',
+    '12': 'चैत्र',
+  }
+
+  return string.replace(/[0-9]/g, m => chars[m]);
+}
diff --git a/extension.js b/extension.js
new file mode 100644
index 0000000..b2492f0
--- /dev/null
+++ b/extension.js
@@ -0,0 +1,76 @@
+/* extension.js
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+/* exported init */
+
+const GETTEXT_DOMAIN = 'nepalidate';
+
+const { Clutter, GObject, St } = imports.gi;
+
+const ExtensionUtils = imports.misc.extensionUtils;
+const Me = imports.misc.extensionUtils.getCurrentExtension();
+const Calendar = Me.imports.calendar;
+const Main = imports.ui.main;
+const PanelMenu = imports.ui.panelMenu;
+const PopupMenu = imports.ui.popupMenu;
+
+const _ = ExtensionUtils.gettext;
+
+const Indicator = GObject.registerClass(
+    class Indicator extends PanelMenu.Button {
+        _init() {
+            super._init(0.0, _('Nepali Date'));
+
+            var nepaliDate = Calendar.toNepali(new Date());
+            console.log(nepaliDate);
+
+            var label = new St.Label({
+                style_class: 'nepalidate-label',
+                y_align: Clutter.ActorAlign.CENTER
+            });
+            label.text = (
+                Calendar.convertMonths(nepaliDate.nm.toString()) + " " +
+                Calendar.convertNumbers(nepaliDate.nd.toString()) + ", " +
+                Calendar.convertNumbers(nepaliDate.ny.toString())
+            );
+
+            this.add_child(label);
+        }
+    });
+
+class Extension {
+    constructor(uuid) {
+        this._uuid = uuid;
+
+        ExtensionUtils.initTranslations(GETTEXT_DOMAIN);
+    }
+
+    enable() {
+        this._indicator = new Indicator();
+        Main.panel.addToStatusArea(this._uuid, this._indicator);
+    }
+
+    disable() {
+        this._indicator.destroy();
+        this._indicator = null;
+    }
+}
+
+function init(meta) {
+    return new Extension(meta.uuid);
+}
diff --git a/metadata.json b/metadata.json
new file mode 100644
index 0000000..8f1711a
--- /dev/null
+++ b/metadata.json
@@ -0,0 +1,10 @@
+{
+  "uuid": "nepalidate@prabin-dahal.com.np",
+  "name": "Nepali Date",
+  "description": "Show Bikram Sambat on the top panel",
+  "version": 1,
+  "shell-version": [
+    "43"
+  ],
+  "url": "https://projects.prabin-dahal.com.np/pdahal/nepalidate"
+}
\ No newline at end of file
diff --git a/stylesheet.css b/stylesheet.css
new file mode 100644
index 0000000..b8d99c5
--- /dev/null
+++ b/stylesheet.css
@@ -0,0 +1,3 @@
+/* Add your custom extension styling here */
+.nepalidate-label {
+}
\ No newline at end of file