first useable version

- colour names possible, even for fading
- mi/mw use server commands

3 files changed, 462 insertions, 0 deletions

diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
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+# colour_chat
+A minetest CSM mod for changing the colour of text sent to the server.
+
+### Usage
+Use .set_colour to set the colour of chat sent to the server, you can
+use either HTML named colours or HTML hexdecimal colour codes. Use
+.rainbow to generate rainbow text 
diff --git a/colournames.lua b/colournames.lua
new file mode 100644
index 0000000..d9e9ec9
--- /dev/null
+++ b/colournames.lua
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+
+-- This list of colour names was extracted and converted from
+-- https://drafts.csswg.org/css-color/#named-colors
+
+
+local colournames = {}
+
+colournames["aliceblue"] =  "#F0F8FF"
+colournames["antiquewhite"] =  "#FAEBD7"
+colournames["aqua"] =  "#00FFFF"
+colournames["aquamarine"] =  "#7FFFD4"
+colournames["azure"] =  "#F0FFFF"
+colournames["beige"] =  "#F5F5DC"
+colournames["bisque"] =  "#FFE4C4"
+colournames["black"] =  "#000000"
+colournames["blanchedalmond"] =  "#FFEBCD"
+colournames["blue"] =  "#0000FF"
+colournames["blueviolet"] =  "#8A2BE2"
+colournames["brown"] =  "#A52A2A"
+colournames["burlywood"] =  "#DEB887"
+colournames["cadetblue"] =  "#5F9EA0"
+colournames["chartreuse"] =  "#7FFF00"
+colournames["chocolate"] =  "#D2691E"
+colournames["coral"] =  "#FF7F50"
+colournames["cornflowerblue"] =  "#6495ED"
+colournames["cornsilk"] =  "#FFF8DC"
+colournames["crimson"] =  "#DC143C"
+colournames["cyan"] =  "#00FFFF"
+colournames["darkblue"] =  "#00008B"
+colournames["darkcyan"] =  "#008B8B"
+colournames["darkgoldenrod"] =  "#B8860B"
+colournames["darkgray"] =  "#A9A9A9"
+colournames["darkgreen"] =  "#006400"
+colournames["darkgrey"] =  "#A9A9A9"
+colournames["darkkhaki"] =  "#BDB76B"
+colournames["darkmagenta"] =  "#8B008B"
+colournames["darkolivegreen"] =  "#556B2F"
+colournames["darkorange"] =  "#FF8C00"
+colournames["darkorchid"] =  "#9932CC"
+colournames["darkred"] =  "#8B0000"
+colournames["darksalmon"] =  "#E9967A"
+colournames["darkseagreen"] =  "#8FBC8F"
+colournames["darkslateblue"] =  "#483D8B"
+colournames["darkslategray"] =  "#2F4F4F"
+colournames["darkslategrey"] =  "#2F4F4F"
+colournames["darkturquoise"] =  "#00CED1"
+colournames["darkviolet"] =  "#9400D3"
+colournames["deeppink"] =  "#FF1493"
+colournames["deepskyblue"] =  "#00BFFF"
+colournames["dimgray"] =  "#696969"
+colournames["dimgrey"] =  "#696969"
+colournames["dodgerblue"] =  "#1E90FF"
+colournames["firebrick"] =  "#B22222"
+colournames["floralwhite"] =  "#FFFAF0"
+colournames["forestgreen"] =  "#228B22"
+colournames["fuchsia"] =  "#FF00FF"
+colournames["gainsboro"] =  "#DCDCDC"
+colournames["ghostwhite"] =  "#F8F8FF"
+colournames["gold"] =  "#FFD700"
+colournames["goldenrod"] =  "#DAA520"
+colournames["gray"] =  "#808080"
+colournames["green"] =  "#008000"
+colournames["greenyellow"] =  "#ADFF2F"
+colournames["grey"] =  "#808080"
+colournames["honeydew"] =  "#F0FFF0"
+colournames["hotpink"] =  "#FF69B4"
+colournames["indianred"] =  "#CD5C5C"
+colournames["indigo"] =  "#4B0082"
+colournames["ivory"] =  "#FFFFF0"
+colournames["khaki"] =  "#F0E68C"
+colournames["lavender"] =  "#E6E6FA"
+colournames["lavenderblush"] =  "#FFF0F5"
+colournames["lawngreen"] =  "#7CFC00"
+colournames["lemonchiffon"] =  "#FFFACD"
+colournames["lightblue"] =  "#ADD8E6"
+colournames["lightcoral"] =  "#F08080"
+colournames["lightcyan"] =  "#E0FFFF"
+colournames["lightgoldenrodyellow"] =  "#FAFAD2"
+colournames["lightgray"] =  "#D3D3D3"
+colournames["lightgreen"] =  "#90EE90"
+colournames["lightgrey"] =  "#D3D3D3"
+colournames["lightpink"] =  "#FFB6C1"
+colournames["lightsalmon"] =  "#FFA07A"
+colournames["lightseagreen"] =  "#20B2AA"
+colournames["lightskyblue"] =  "#87CEFA"
+colournames["lightslategray"] =  "#778899"
+colournames["lightslategrey"] =  "#778899"
+colournames["lightsteelblue"] =  "#B0C4DE"
+colournames["lightyellow"] =  "#FFFFE0"
+colournames["lime"] =  "#00FF00"
+colournames["limegreen"] =  "#32CD32"
+colournames["linen"] =  "#FAF0E6"
+colournames["magenta"] =  "#FF00FF"
+colournames["maroon"] =  "#800000"
+colournames["mediumaquamarine"] =  "#66CDAA"
+colournames["mediumblue"] =  "#0000CD"
+colournames["mediumorchid"] =  "#BA55D3"
+colournames["mediumpurple"] =  "#9370DB"
+colournames["mediumseagreen"] =  "#3CB371"
+colournames["mediumslateblue"] =  "#7B68EE"
+colournames["mediumspringgreen"] =  "#00FA9A"
+colournames["mediumturquoise"] =  "#48D1CC"
+colournames["mediumvioletred"] =  "#C71585"
+colournames["midnightblue"] =  "#191970"
+colournames["mintcream"] =  "#F5FFFA"
+colournames["mistyrose"] =  "#FFE4E1"
+colournames["moccasin"] =  "#FFE4B5"
+colournames["navajowhite"] =  "#FFDEAD"
+colournames["navy"] =  "#000080"
+colournames["oldlace"] =  "#FDF5E6"
+colournames["olive"] =  "#808000"
+colournames["olivedrab"] =  "#6B8E23"
+colournames["orange"] =  "#FFA500"
+colournames["orangered"] =  "#FF4500"
+colournames["orchid"] =  "#DA70D6"
+colournames["palegoldenrod"] =  "#EEE8AA"
+colournames["palegreen"] =  "#98FB98"
+colournames["paleturquoise"] =  "#AFEEEE"
+colournames["palevioletred"] =  "#DB7093"
+colournames["papayawhip"] =  "#FFEFD5"
+colournames["peachpuff"] =  "#FFDAB9"
+colournames["peru"] =  "#CD853F"
+colournames["pink"] =  "#FFC0CB"
+colournames["plum"] =  "#DDA0DD"
+colournames["powderblue"] =  "#B0E0E6"
+colournames["purple"] =  "#800080"
+colournames["rebeccapurple"] =  "#663399"
+colournames["red"] =  "#FF0000"
+colournames["rosybrown"] =  "#BC8F8F"
+colournames["royalblue"] =  "#4169E1"
+colournames["saddlebrown"] =  "#8B4513"
+colournames["salmon"] =  "#FA8072"
+colournames["sandybrown"] =  "#F4A460"
+colournames["seagreen"] =  "#2E8B57"
+colournames["seashell"] =  "#FFF5EE"
+colournames["sienna"] =  "#A0522D"
+colournames["silver"] =  "#C0C0C0"
+colournames["skyblue"] =  "#87CEEB"
+colournames["slateblue"] =  "#6A5ACD"
+colournames["slategray"] =  "#708090"
+colournames["slategrey"] =  "#708090"
+colournames["snow"] =  "#FFFAFA"
+colournames["springgreen"] =  "#00FF7F"
+colournames["steelblue"] =  "#4682B4"
+colournames["tan"] =  "#D2B48C"
+colournames["teal"] =  "#008080"
+colournames["thistle"] =  "#D8BFD8"
+colournames["tomato"] =  "#FF6347"
+colournames["turquoise"] =  "#40E0D0"
+colournames["violet"] =  "#EE82EE"
+colournames["wheat"] =  "#F5DEB3"
+colournames["white"] =  "#FFFFFF"
+colournames["whitesmoke"] =  "#F5F5F5"
+colournames["yellow"] =  "#FFFF00"
+colournames["yellowgreen"] =  "#9ACD32"
+
+
+function colourname2hex(colname)
+   if not colname then return "" end
+   if colname == "" then return "" end
+   if colname:sub(1,1) == "#" then
+      if #colname == 7 then
+	 -- let's guess it's a hexcode as colour
+	 return colname
+      end 
+   end
+   if colournames[colname] then
+      return colournames[colname]
+   end
+   -- be safe and return nothing
+   return ""
+end
+
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..e55419d
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,282 @@
+local modstorage = core.get_mod_storage()
+
+local register_on_message = core.register_on_sending_chat_message
+if core.register_on_sending_chat_messages then
+	register_on_message = core.register_on_sending_chat_messages
+end
+
+local function rgb_to_hex(rgb)
+	local hexadecimal = '#'
+
+	for key, value in pairs(rgb) do
+		local hex = ''
+
+		while(value > 0)do
+			local index = math.fmod(value, 16) + 1
+			value = math.floor(value / 16)
+			hex = string.sub('0123456789ABCDEF', index, index) .. hex			
+		end
+
+		if(string.len(hex) == 0)then
+			hex = '00'
+
+		elseif(string.len(hex) == 1)then
+			hex = '0' .. hex
+		end
+
+		hexadecimal = hexadecimal .. hex
+	end
+
+	return hexadecimal
+end
+
+local function color_from_hue(hue)
+	local h = hue / 60
+	local c = 255
+	local x = (1 - math.abs(h%2 - 1)) * 255
+
+  	local i = math.floor(h);
+  	if (i == 0) then
+		return rgb_to_hex({c, x, 0})
+  	elseif (i == 1) then 
+		return rgb_to_hex({x, c, 0})
+  	elseif (i == 2) then 
+		return rgb_to_hex({0, c, x})
+	elseif (i == 3) then
+		return rgb_to_hex({0, x, c});
+	elseif (i == 4) then
+		return rgb_to_hex({x, 0, c});
+	else 
+		return rgb_to_hex({c, 0, x});
+	end
+end
+
+local function pastel_from_hue(hue)
+	local h = hue / 60
+	local c = 255
+   local d = 192
+	local x = (1 - math.abs(h%2 - 1)) * 255
+
+  	local i = math.floor(h);
+  	if (i == 0) then
+		return rgb_to_hex({c, x, d})
+  	elseif (i == 1) then 
+		return rgb_to_hex({x, c, d})
+  	elseif (i == 2) then 
+		return rgb_to_hex({d, c, x})
+	elseif (i == 3) then
+		return rgb_to_hex({d, x, c});
+	elseif (i == 4) then
+		return rgb_to_hex({x, d, c});
+	else 
+		return rgb_to_hex({c, d, x});
+	end
+end
+
+function hex2rgb(hex)  -- added - found on github
+    hex = hex:gsub("#","")
+    return {tonumber("0x"..hex:sub(1,2)), tonumber("0x"..hex:sub(3,4)), tonumber("0x"..hex:sub(5,6))}
+end
+
+local function color_step(pos, col1, col2)  -- added - gets a color between colors
+	local rgb1 = hex2rgb(col1)
+	local rgb2 = hex2rgb(col2)
+	local rgb = {}
+	for i, v in pairs(rgb1) do
+		rgb[i] = rgb1[i]+(rgb2[i]-rgb1[i])*(pos/255)
+	end
+	return rgb_to_hex(rgb)
+end
+
+local function canTalk()
+	if core.get_privilege_list then
+		return core.get_privilege_list().shout
+	else
+		return true
+	end
+end
+
+local function say(message)
+	if not canTalk() then
+		minetest.display_chat_message("You need 'shout' in order to talk")
+		return
+	end
+	minetest.send_chat_message(message)
+	if minetest.get_server_info().protocol_version < 29 then
+		local name = minetest.localplayer:get_name()
+		minetest.display_chat_message("<"..name.."> " .. message)
+	end
+end
+
+function fade(parameter)
+	local col1 = string.sub(parameter, 1, 7)
+	local col2 = string.sub(parameter, 9, 15)
+	local message = string.sub(parameter, 17)
+	if not canTalk() then
+		return false, "You need 'shout' in order to use this command"
+	end
+	if col1 == col2 then
+		say(core.get_color_escape_sequence(col1) .. message)
+		return true
+	end
+	local step = 255 / message:len()
+	local pos = 0
+	local output = ""
+	for i = 1, message:len() do
+		local char = message:sub(i,i)
+		if char:match("%s") then
+			output = output .. char
+		else
+			output = output  .. core.get_color_escape_sequence(color_step(pos, col1, col2)) .. char 
+		end
+			pos = pos + step
+	end
+	say(output)
+	return true
+end
+
+register_on_message(function(message)
+	if message:sub(1,1) == "/" or modstorage:get_string("colour") == "" or modstorage:get_string("colour") == "white" then
+		return false
+	end
+
+	fade(modstorage:get_string("colour") .. " " .. message)
+	return true
+end)
+
+core.register_chatcommand("set_colour", {
+	description = core.gettext("Change chat colour"),
+	func = function(colour)
+		  if colour:len() == 7 then
+		     modstorage:set_string("colour", colour.." "..colour)
+		  else
+		     modstorage:set_string("colour", colour)
+		  end
+		  return true, "Chat colour changed."
+	       end,
+})
+
+core.register_chatcommand("get_colour", {
+        description = core.gettext("Display chat colour"),
+	func = function()
+		  local cc = modstorage:get_string("colour")
+		  return true, "Current chat colour: " .. cc
+	       end,
+     })
+			     
+
+core.register_chatcommand("rainbow", {
+	description = core.gettext("rainbow text"),
+	func = function(param)
+		if not canTalk() then
+			return false, "You need 'shout' in order to use this command"
+		end
+		local step = 360 / param:len()
+ 		local hue = 0
+     		 -- iterate the whole 360 degrees
+		local output = ""
+      		for i = 1, param:len() do
+			local char = param:sub(i,i)
+			if char:match("%s") then
+				output = output .. char
+			else
+        			output = output  .. core.get_color_escape_sequence(colour_from_hue(hue)) .. char 
+			end
+        		hue = hue + step
+		end
+		say(output)
+		return true
+end,
+})
+
+core.register_chatcommand("fade", {  -- added - fades between any two colors
+	description = core.gettext("fade message between two colors"),
+	func = fade,
+})
+
+core.register_chatcommand("pastel", {
+	description = core.gettext("pastel rainbow text"),
+	func = function(param)
+		if not canTalk() then
+			return false, "You need 'shout' in order to use this command"
+		end
+		local step = 360 / param:len()
+ 		local hue = 0
+     		 -- iterate the whole 360 degrees
+		local output = ""
+      		for i = 1, param:len() do
+			local char = param:sub(i,i)
+			if char:match("%s") then
+				output = output .. char
+			else
+        			output = output  .. core.get_color_escape_sequence(pastel_from_hue(hue)) .. char 
+			end
+        		hue = hue + step
+		end
+		say(output)
+		return true
+end,
+})
+
+core.register_chatcommand("mw", {
+        description = core.gettext("moderator warning"),
+        func = function(param)
+                if not canTalk() then
+                        return false, "You need 'shout' in order to use this comand"
+                end
+                local output = ""
+                output = core.get_color_escape_sequence("#ffdf00") .. "MODERATOR WARNING: "
+                output = output .. core.get_color_escape_sequence("#ff7fff") ..param
+                say(output)
+                return true
+end,
+})
+
+
+core.register_chatcommand("mi", {
+        description = core.gettext("moderator info"),
+        func = function(param)
+                if not canTalk() then
+                        return false, "You need 'shout' in order to use this command"
+                end
+                local output = ""
+		output = core.get_color_escape_sequence("#d0ff00") .. "MODERATOR INFO: " 
+		output = output .. core.get_color_escape_sequence("#dfdfff") .. param
+    		say(output)
+		return true
+end,
+})
+
+
+
+core.register_chatcommand("rainbow", {
+	description = core.gettext("rainbow text"),
+	func = function(param)
+		if not canTalk() then
+			return false, "You need 'shout' in order to use this command"
+		end
+		local step = 360 / param:len()
+ 		local hue = 0
+     		 -- iterate the whole 360 degrees
+		local output = ""
+      		for i = 1, param:len() do
+			local char = param:sub(i,i)
+			if char:match("%s") then
+				output = output .. char
+			else
+        			output = output  .. core.get_color_escape_sequence(color_from_hue(hue)) .. char 
+			end
+        		hue = hue + step
+		end
+		say(output)
+		return true
+end,
+})
+
+core.register_chatcommand("say", {
+	description = core.gettext("Send text without applying colour to it"),
+	func = function(text)
+		say(text)
+		return true
+	end,
+})