Keymap: Velocikey implemented at userspace, readme is more helpful (#3974)

* deleting arkag branch, forcibly moving changes over to master

* fade_color function added, not tested

* added half functions some stuff

* surround_type function implemented and working.

* added flashing function and removed fading, flashing supports infinite flashing along with controlled number flashes

* added a fade state machine and functionality

* build optimizations, changed fade to bounce between bounds rather than roll over, added a HALMAK layout

* changes to sleep breath function, changed how I will switch to HALMAK

* support for halmak added

* support for activity detection added, condensed fading and flashing state machines, removed support for HALMAK and COLEMAK because arkag is stupid

* changed sleep and inactive behaviors, now the color shifting reverses on state change, yay! save_color and reset_color are made to enable layer color changing to look cooler.

* reformatted some if statements in state detection

* changes to force fade to pause on boot, or plug in.

* Attempting to move over to userspace, pushing to repository for help

* userspace stuff....

* userspace stuff....

* layout changes, working userspace,

Removed left side shift and replaced it with a MT() for LSFT and SPC. Userspace seems to be working properly now! HURRAY

* Layout change

Removed space/shift and reset modifiers to what they were originally. Added homerow modifiers.

* Removed excessive tabs in files

* Moved mods on homerow around...

* changes recommended by @drashna

* removed homerow mods, more flashy lighting!

* changed delays for lighting.

* velocikey code retro fit into userspace to match typing speed

currently "working" but isn't as reactive as I want.

* Readme and other documentation hidden throughout code

* Added a pretty picture

* pretty picture actually added

* More readme updates

* Velocikey now working inside my userspace!

* Changed repo macro and fixed readme

* Removed media layer, moved media control to LAZY layer

* fixed more merge issues when I had to merge...

4 files changed, 159 insertions, 134 deletions

diff --git a/users/arkag/arkag.c b/users/arkag/arkag.c
index c716b5e93f..a35e13ed6b 100644
--- a/users/arkag/arkag.c
+++ b/users/arkag/arkag.c
@@ -1,5 +1,10 @@
 #include "arkag.h"
 
+/*
+ Current Layout and Keeb:
+ https://github.com/arkag/qmk_firmware/blob/master/keyboards/mechmini/v2/keymaps/arkag/keymap.c
+*/
+
 // Start: Written by konstantin: vomindoraan
 #include <ctype.h>
 #include <stdlib.h>
@@ -8,38 +13,68 @@
 void send_unicode_hex_string(const char *str) {
   if (!str) { return; } // Saftey net
   while (*str) {
-          // Find the next code point (token) in the string
-          for (; *str == ' '; str++);
-          size_t n = strcspn(str, " "); // Length of the current token
-          char code_point[n+1];
-          strncpy(code_point, str, n);
-          code_point[n] = '\0'; // Make sure it's null-terminated
-
-          // Normalize the code point: make all hex digits lowercase
-          for (char *p = code_point; *p; p++) {
-                  *p = tolower(*p);
-          }
-
-          // Send the code point as a Unicode input string
-          unicode_input_start();
-          send_string(code_point);
-          unicode_input_finish();
-          str += n; // Move to the first ' ' (or '\0') after the current token
+    // Find the next code point (token) in the string
+    for (; *str == ' '; str++);
+    size_t n = strcspn(str, " "); // Length of the current token
+    char code_point[n+1];
+    strncpy(code_point, str, n);
+    code_point[n] = '\0'; // Make sure it's null-terminated
+
+    // Normalize the code point: make all hex digits lowercase
+    for (char *p = code_point; *p; p++) {
+            *p = tolower(*p);
+    }
+
+    // Send the code point as a Unicode input string
+    unicode_input_start();
+    send_string(code_point);
+    unicode_input_finish();
+    str += n; // Move to the first ' ' (or '\0') after the current token
   }
 }
 // End: Written by konstantin: vomindoraan
 
-uint8_t       current_os, mod_primary_mask, fade_delay;
-uint16_t      flash_timer_one, flash_timer_two,
-              fade_timer_one, fade_timer_two,
-              active_timer_one, active_timer_two,
-              elapsed               = 0,
+// Start: Written by Chris Lewis
+#ifndef MIN
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#endif
+#ifndef MAX
+#define MAX(a,b) (((a)>(b))?(a):(b))
+#endif
+
+#define TYPING_SPEED_MAX_VALUE 200
+uint8_t typing_speed = 0;
+
+void velocikey_accelerate() {
+    if (typing_speed < TYPING_SPEED_MAX_VALUE) typing_speed += (TYPING_SPEED_MAX_VALUE / 50);
+}
+
+void velocikey_decelerate() {
+  static uint16_t decay_timer = 0;
+
+  if (timer_elapsed(decay_timer) > 500 || decay_timer == 0) {
+    if (typing_speed > 0) typing_speed -= 1;
+    //Decay a little faster at half of max speed
+    if (typing_speed > TYPING_SPEED_MAX_VALUE / 2) typing_speed -= 1;
+    //Decay even faster at 3/4 of max speed
+    if (typing_speed > TYPING_SPEED_MAX_VALUE / 4 * 3) typing_speed -= 3;
+    decay_timer = timer_read();
+  }
+}
+
+uint8_t velocikey_match_speed(uint8_t minValue, uint8_t maxValue) {
+  return MAX(minValue, maxValue - (maxValue - minValue) * ((float)typing_speed / TYPING_SPEED_MAX_VALUE));
+}
+// End: Written by Chris Lewis
+
+uint8_t       current_os,
+              mod_primary_mask,
+              fade_interval,
               num_extra_flashes_off = 0;
 Color         underglow,
               flash_color,
               saved_color,
-              hsv_none      = {0,0,0},
-              hsv_white     = {0,0,127};
+              hsv_none      = {0,0,0};
 flashState    flash_state   = no_flash;
 fadeState     fade_state    = add_fade;
 activityState state         = boot;
@@ -79,134 +114,103 @@ Color mod_color(Color current_color, bool should_add, uint8_t change_amount) {
   return current_color;
 }
 
-void reverse_fade (void) {
-  if (fade_state == add_fade){
-    fade_state = sub_fade;
-  } else {
-    fade_state = add_fade;
-  }
-}
-
 void check_state (void) {
-        static bool activated, deactivated, slept;
-        switch (state) {
-        case active:
-          if (!activated) {
-            fade_delay = LED_FADE_DELAY;
-            reverse_fade();
-            activated = true;
-            deactivated = false;
-          }
-          active_timer_two = timer_read();
-          elapsed = active_timer_two - active_timer_one;
-          if (elapsed < INACTIVE_DELAY) {return;}
-          state = inactive;
-          return;
-
-        case inactive:
-          if (!deactivated) {
-            fade_delay = LED_FADE_DELAY * 2;
-            reverse_fade();
-            deactivated = true;
-            slept = false;
-            activated = false;
-          }
-          active_timer_two = timer_read();
-          elapsed = active_timer_two - active_timer_one;
-          if (elapsed < SLEEP_DELAY) {return;}
-          state = sleeping;
-          return;
-
-        case sleeping:
-          if (!slept) {
-            fade_delay = LED_FADE_DELAY * 6;
-            reverse_fade();
-            slept = true;
-            deactivated = false;
-            activated = false;
-          }
-          return;
-
-        case boot:
-          return;
-        }
+  static uint16_t active_timer;
+  if (!active_timer) {active_timer = timer_read();}
+  static bool activated, deactivated, slept;
+  switch (state) {
+  case active:
+    if (!activated) {
+      if (slept) {rgblight_mode_noeeprom(1);}
+      activated = true;
+      deactivated = false;
+      slept = false;
+    }
+    fade_interval = velocikey_match_speed(1, 25);
+    if (timer_elapsed(active_timer) < INACTIVE_DELAY) {return;}
+    active_timer = timer_read();
+    state = inactive;
+    return;
+
+  case inactive:
+    if (!deactivated) {
+      deactivated = true;
+      activated = false;
+      slept = false;
+    }
+    velocikey_decelerate();
+    fade_interval = velocikey_match_speed(1, 25);
+    if (timer_elapsed(active_timer) < SLEEP_DELAY) {return;}
+    state = sleeping;
+    return;
+
+  case sleeping:
+    if (!slept) {
+      rgblight_mode_noeeprom(4);
+      slept = true;
+      activated = false;
+      deactivated = false;
+    }
+    return;
+
+  case boot:
+    return;
+  }
 }
 
 void fade_rgb (void) {
-  static bool ran_once;
-  if (flash_state != no_flash) {return;}
+  static uint16_t fade_timer;
   if (state == boot) {return;}
+  if (!fade_timer) {fade_timer = timer_read();}
+  if (timer_elapsed(fade_timer) < fade_interval) {return;}
   switch (fade_state) {
   case add_fade:
-    if (!ran_once) {
-      fade_timer_one = timer_read();
-      ran_once = true;
-    }
-    fade_timer_two = timer_read();
-    elapsed = fade_timer_two - fade_timer_one;
-    if (elapsed < fade_delay) {return;}
     if (underglow.h == 359) {
       fade_state = sub_fade;
       return;
     }
     underglow.h = underglow.h + 1;
-    set_color(underglow, false);
-    // set_color_at(underglow, 0);
-    fade_timer_one = fade_timer_two;
-    return;
+    break;
 
   case sub_fade:
-    fade_timer_two = timer_read();
-    elapsed = fade_timer_two - fade_timer_one;
-    if (elapsed < fade_delay) {return;}
     if (underglow.h == 0) {
       fade_state = add_fade;
       return;
     }
     underglow.h = underglow.h - 1;
+    break;
+  }
+  fade_timer = timer_read();
+  if (flash_state == no_flash) {
     set_color(underglow, false);
-    // set_color_at(underglow, 0);
-    fade_timer_one = fade_timer_two;
-    return;
   }
 }
 
 void flash_rgb (void) {
-  static bool ran_once;
+  static uint16_t flash_timer;
   switch(flash_state) {
   case no_flash:
     return;
 
   case flash_off:
-    if (!ran_once) {
-      set_color(hsv_none, false);
-      flash_timer_one = timer_read();
-      ran_once = true;
-      flash_state = flash_on;
-      return;
-    }
-    flash_timer_two = timer_read();
-    elapsed = flash_timer_two - flash_timer_one;
-    if (elapsed >= LED_FLASH_DELAY) {
+    if (!flash_timer) {flash_timer = timer_read();}
+    if (timer_elapsed(flash_timer) >= LED_FLASH_DELAY) {
       set_color(hsv_none, false);
-      flash_timer_one = timer_read();
+      flash_timer = timer_read();
       flash_state = flash_on;
     }
     return;
 
   case flash_on:
-    flash_timer_two = timer_read();
-    elapsed = flash_timer_two - flash_timer_one;
-    if (elapsed >= LED_FLASH_DELAY) {
+    if (timer_elapsed(flash_timer) >= LED_FLASH_DELAY) {
       set_color(flash_color, false);
-      flash_timer_one = timer_read();
+      flash_timer = timer_read();
       if (num_extra_flashes_off > 0) {
         flash_state = flash_off;
         num_extra_flashes_off--;
       } else {
         set_color(underglow, false);
         flash_state = no_flash;
-        ran_once = false;
       }
     }
     return;
@@ -239,8 +243,9 @@ void set_os (uint8_t os, bool update) {
     mod_primary_mask = MOD_CTL_MASK;
   }
   set_color(underglow, update);
-  flash_color = underglow;
-  flash_state = flash_off;
+  flash_color           = underglow;
+  flash_state           = flash_off;
+  state                 = boot;
   num_extra_flashes_off = 1;
 }
 
@@ -462,7 +467,7 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
 
   case M_REPO:
     if (record->event.pressed) {
-      SEND_STRING("https://github.com/arkag/qmk_firmware/tree/master/keyboards/mechmini/v2/keymaps/arkag");
+      SEND_STRING("https://github.com/qmk/qmk_firmware/tree/master/users/arkag");
     }
     return false;
 
@@ -505,10 +510,11 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
 
   case KC_LSFT:
     if (record->event.pressed) {
-      set_color(mod_color(underglow, true, 50), false);
+      save_color(underglow);
+      underglow = mod_color(underglow, true, 75);
       SEND_STRING(SS_DOWN(X_LSHIFT));
     } else {
-      set_color(underglow, false);
+      reset_color();
       SEND_STRING(SS_UP(X_LSHIFT));
     }
     return false;
@@ -522,8 +528,8 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
 
   default:
     if (record->event.pressed) {
-      active_timer_one = timer_read();
       state = active;
+      velocikey_accelerate();
     }
     return true;
   }
diff --git a/users/arkag/arkag.h b/users/arkag/arkag.h
index 9c81e4487c..a4672a8e82 100644
--- a/users/arkag/arkag.h
+++ b/users/arkag/arkag.h
@@ -25,26 +25,13 @@
 #define MOD_GUI_MASK (MOD_BIT(KC_LGUI) | MOD_BIT(KC_RGUI))
 #define MOD_SFT_MASK (MOD_BIT(KC_LSFT) | MOD_BIT(KC_RSFT))
 
-#define TAP_A    LALT_T(KC_A)
-#define TAP_SCN  RALT_T(KC_SCOLON)
-
-#define TAP_S    LCTL_T(KC_S)
-#define TAP_L    RCTL_T(KC_L)
-
-#define TAP_D    LSFT_T(KC_D)
-#define TAP_K    RSFT_T(KC_K)
-
-#define TAP_F    LGUI_T(KC_F)
-#define TAP_J    RGUI_T(KC_J)
-
-#define TAP_EQ   LSFT_T(KC_EQUAL)
-#define TAP_5    RSFT_T(KC_5)
-
 #define LED_FLASH_DELAY       150
-#define LED_FADE_DELAY        10
 
-#define INACTIVE_DELAY        200
-#define SLEEP_DELAY           60000
+#define ACCEL_DELAY           500
+#define DEACCEL_DELAY         500
+
+#define INACTIVE_DELAY        250
+#define SLEEP_DELAY           180000
 
 enum {
   _QWERTY = 0,
@@ -124,6 +111,10 @@ enum tapdances {
 
 void send_unicode_hex_string(const char *str);
 
+void velocikey_accelerate(void);
+void velocikey_decelerate(void);
+uint8_t velocikey_match_speed(uint8_t minValue, uint8_t maxValue);
+
 void set_color (Color new, bool update);
 void save_color(Color to_save);
 void reset_color(void);
diff --git a/users/arkag/mechmini2.jpg b/users/arkag/mechmini2.jpg
new file mode 100644
index 0000000000..611a0859c0
--- /dev/null
+++ b/users/arkag/mechmini2.jpg
diff --git a/users/arkag/readme.md b/users/arkag/readme.md
index 76a5c4525b..c685892f86 100644
--- a/users/arkag/readme.md
+++ b/users/arkag/readme.md
@@ -1,3 +1,26 @@
+# Shot on Pixel 2 XL with Cheap Lamp at Work
+
+![mmm, tasty](mechmini2.jpg)
+
+# I don't know what I'm doing
+
+Some links:
+* [Layout File: Mech Mini 2](layout_mm2)
+* [Userspace Header](arkag_h)
+* [Userspace Main](arkag_c)
+
+Here's a list of some things I have working with my currently [keyboard](mm2_home):
+
+* Reactive (sort of) fading while typing, ported from [Velocikey](https://github.com/qmk/qmk_firmware/pull/3754).
+* OS Switching, storing to EEPROM
+* OS Specific Macros and Shortcuts(WIN+SHIFT+S for Windows and CMD+SHIFT+4 for MacOS)
+* Flashing RGB LED on OS change
+* Hex Unicode Macros dependent on OS(half works on Windows due to [WinCompose](https://github.com/SamHocevar/wincompose) not functioning properly just yet).
+* "Sleep" function activates after 3 minutes (breathing).
+* Markdown style macros for surround type __eve__ ~~ryw~~ *her* **eee** (apparently only certain places support underline and strikethrough ಠ__ಠ)
+
+# License Stuff
+
 Copyright 2018 arkag arkag@pm.me
 
 This program is free software: you can redistribute it and/or modify
@@ -12,3 +35,8 @@ 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/>.
+
+[arkag_c]:    /users/arkag/arkag.c
+[arkag_h]:    /users/arkag/arkag.h
+[layout_mm2]: /keyboards/mechmini/v2/keymaps/arkag/keymap.c
+[mm2_home]:   https://cartel.ltd/projects/mechmini2/