From 76593d14836aa920051efcd85ca4dc0bcb6c1f69 Mon Sep 17 00:00:00 2001
From: Felisp <rspointer@post.cz>
Date: Sun, 7 Jan 2024 01:29:23 +0100
Subject: [PATCH] Initial and hopefully last commit

I should put up some more public repos so this one is not such an eyesore
---
 README.org    | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 sleepCalc.lua | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 90 insertions(+)
 create mode 100644 README.org
 create mode 100755 sleepCalc.lua

diff --git a/README.org b/README.org
new file mode 100644
index 0000000..82bf8a4
--- /dev/null
+++ b/README.org
@@ -0,0 +1,48 @@
+#+OPTIONS: toc:nil
+* Sleep calc
+
+Silly script in Lua to help me with sleep planing. Should work well in termux.
+Developed with Lua5.3 should work in any Lua5
+
+** What it does:
+
+It prints what are the best times to wake up and duration of sleep when presented wake up times are used.
+Like this:
+
+#+BEGIN_SRC bash
+$ # now it's 01:23; we expect to fall asleep in 5 minutes
+$ ./sleepCalc.lua 5
+If gonna fall sleep at: 01:25
+Wake up | to sleep
+------------------
+02:20   | 01h00m
+03:20   | 02h00m
+04:20   | 03h00m
+05:20   | 04h00m
+06:20   | 05h00m
+07:20   | 06h00m
+08:20   | 07h00m
+09:20   | 08h00m
+#+END_SRC
+
+** Usage
+
+- Two (optional) positional arguments
+  1) Number of minutes you estimate it will take you to fall asleep
+     - Default is 40 because I'm the only expected audience and I always to pray to Luna & Celestia before sleep
+  2) How many minutes one sleep cycle takes
+     - Default is 90minutes
+
+** Notice
+
+- Don't quote me on this I haven't actually done any research in this area
+- This is just summarized knowledge I collected from randoms on the internet
+- Most of it is probably wrong or oversimplified
+- Total amount of research that went into this is < 5
+- I just did it a few times and felt it actually worked (could be placebo)
+
+** Basic ideas
+
+- Ideal power nap is 20min
+- Light sleep part of sleep is every 1h30m
+- if you wake up in some multiple of 90 minutes, you should feel fresh a well rested
diff --git a/sleepCalc.lua b/sleepCalc.lua
new file mode 100755
index 0000000..479e017
--- /dev/null
+++ b/sleepCalc.lua
@@ -0,0 +1,42 @@
+#!/usr/bin/env lua
+
+-- Everything is in minutes
+local DEFAULT_SLEEP_CYCLE            = 90;
+local DEFAULT_TIME_TO_FALL_ASLEEP    = 40;
+local DEFAULT_TIME_TO_SLEEP_POWERNAP = 5;
+
+local gonnaFallAsleepIn, actualSleepCycle;
+
+-- Returns text representation of hh:mm
+-- calculated from [now] seconds
+-- We cant use os.date because of time zones
+local function getHoursAndMinsString(mins)
+   local hours = mins // 60;
+   local minutes = mins % 60;
+   return (hours > 9 and hours or "0" .. hours) .. "h" .. (minutes > 9 and minutes or "0" .. minutes) .. "m";
+end
+
+local args = { ... };
+
+if (#args == 2) then
+   gonnaFallAsleepIn = tonumber(args[1]);
+   actualSleepCycle  = tonumber(args[2]);
+elseif (#args == 1) then
+   gonnaFallAsleepIn = tonumber(args[1]);
+   actualSleepCycle  = DEFAULT_SLEEP_CYCLE;
+else
+   gonnaFallAsleepIn = DEFAULT_TIME_TO_FALL_ASLEEP;
+   actualSleepCycle  = DEFAULT_SLEEP_CYCLE;
+end
+
+local now = os.time();
+
+print("If gonna fall sleep at: " .. os.date("%H:%M", now + (gonnaFallAsleepIn * 60)));
+print("Wake up | to sleep\n------------------");
+
+local sleepLen = actualSleepCycle;
+for i = 0, 7, 1 do
+   print(os.date("%H:%M", now + (actualSleepCycle * 60)) .. "   | " .. getHoursAndMinsString(sleepLen));
+   sleepLen = sleepLen + actualSleepCycle;
+   now = now + (actualSleepCycle * 60);
+end