NPC-given quests!

.luacheckrc

@@ -1,13 +1,13 @@
 globals = {
 	"vkore", "player_stats", "hb", "players", "gold",
 	"party", "nodes", "mapgen", "spawners", "pathfinder",
-	"mobkit", "mobkit_custom", "swords"
+	"mobkit", "mobkit_custom", "swords", "vk_quests", "vk_quest",
 }
 
 read_globals = {
 	"minetest", "sfinv",
 	string = {fields = {"split"}},
-	table = {fields = {"copy", "getn"}},
+	table = {fields = {"copy", "getn", "indexof",}},
 	math = {fields = {"round"}},
 
 	-- Builtin

api.md

@@ -0,0 +1,34 @@
+# Voxel Knights API
+
+May be incomplete. Any help with documentation is appreciated
+
+## vk_quests
+
+`vk_quests.register_quest(type, name, def)`
+
+* type - Type of quest.
+  * kill - Quest to kill a certain amount of enemies
+* name - Used to identify the quest
+* def - quest def. See [Quest Types] for more info
+
+### [Quest Types]
+
+#### kill
+
+* type - "kill"
+* name - Name of enemy to kill (e.g spider:spider)
+* def:
+  * description - Description of quest (e.g Kill 10 spiders)
+  * comments (string/list of strings) - Comments for the NPC to make about the quest
+  * amount - Amount of enemies that you need to kill
+  * rewards - Table of rewards to give on completion.
+    * Works with all [Player Meta] stored as an int
+    * Example: {xp = 3, gold = 10} to give 3 xp and 10 gold
+
+## [Player Meta]
+
+List of all player meta used for things like gold/xp
+
+* `gold` (int) - Stores the player's gold
+* `xp` (int) - Stores the player's xp
+* `availiable_statpoints` (int) - Stores the player's avaliable statpoints

mods/vk_npcs/init.lua

@@ -12,13 +12,30 @@ local default_hit_replies = {
 }
 
 local function prettify(npcname)
-	local output = npcname:gsub("_", " ")
+		local output = npcname:gsub("_", " ")
 
-	return output:gsub("^(.)", string.upper)
+		return output:gsub("^(.)", string.upper)
 end
 
+--[[
+	context is used to save formspec info when a player is interacting with npcs.
+	It is cleared on exit/server restart
+	Default values:
+	{
+		tab = 1, -- Current tab the player is on
+		npcdef = def, -- NPC definition. Used to grab convos and NPC names
+		quest = 1, -- Selected quest in quest list
+		quests = {}, -- List of quests availiable from npc
+	}
+]]
+local context = {}
+minetest.register_on_leaveplayer(function(player) context[player:get_player_name()] = nil end)
+
 local function register_npc(name, def)
+	def.npcname = name
+
 	minetest.register_node(modname..":"..name, {
+		npcname = name,
 		description = "NPC "..prettify(name),
 		drawtype = "mesh",
 		mesh = "player.obj",
@@ -55,24 +72,142 @@ local function register_npc(name, def)
 		on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
 			if not clicker or not clicker:is_player() then return end
 
-			local formspec = ([[
-				size[8,6]
-				real_coordinates[true]
-				label[0.2,0.3;%s]
-			]]):format(
-				prettify(name)
-			)
+			local pname = clicker:get_player_name()
 
-			if not def.convos then
-				minetest.chat_send_player(clicker:get_player_name(), ("<%s> "):format(prettify(name)).."I have nothing to say")
-				return
+			if not context[pname] or context[pname].npcdef.npcname ~= name then
+				context[pname] = {
+					tab = 1,
+					npcdef = def,
+					quest = 1
+				}
 			end
 
-			minetest.show_formspec(clicker:get_player_name(), "npcform", formspec)
+			vk_quests.show_npc_form(pname, context[pname])
 		end
 	})
 end
 
+function vk_quests.show_npc_form(pname, pcontext)
+	local temp
+	local formspec = ([[
+		size[8,6]
+		real_coordinates[true]
+		label[0.2,0.3;%s]
+	]]):format(
+		prettify(pcontext.npcdef.npcname)
+	)
+
+	if not pcontext.npcdef.convos then
+		minetest.chat_send_player(pname, ("<%s> "):format(prettify(pcontext.npcdef.npcname)).."I have nothing to say")
+		return
+	end
+
+	local convos = ""
+	local convo_content
+	temp = 0 -- tab number
+	for cname, content in pairs(pcontext.npcdef.convos) do
+		temp = temp + 1
+
+		-- Save the content of the currently selected convo for later use
+		if temp == pcontext.tab then
+			convo_content = content
+		end
+
+		convos = convos .. cname .. ","
+	end
+
+	convos = convos:sub(1, -2) -- Remove trailing comma
+
+	formspec = formspec ..
+		"tabheader[0,2;1;convos;"..convos..";".. pcontext.tab ..";false;true]"
+
+	local quests = {}
+	local quest_convo = false
+
+	for _, quest in pairs(convo_content) do
+		if vk_quest[quest] then
+			quest_convo = true
+			table.insert(quests, vk_quest[quest])
+		end
+	end
+
+	if quest_convo then
+		local comments = quests[pcontext.quest].comments
+
+		-- Remove quests in progress
+		for k, quest in ipairs(quests) do
+			if vk_quests.get_unfinished_quest(pname, quest.qid) then
+				table.remove(quests, k)
+			end
+		end
+
+		if #quests > 0 then
+			formspec = formspec ..
+				"hypertext[0,2.2;8,4;comment;\""..comments[math.random(1, #comments)].."\"]" ..
+				"textlist[0,3.5;8,2.5;quests;"
+
+			pcontext.quests = {}
+			for _, quest in ipairs(quests) do
+				table.insert(pcontext.quests, quest.qid)
+				formspec = ("%s%s - %s,"):format(
+					formspec,
+					quest.description,
+					minetest.formspec_escape(quest.rewards_description)
+				)
+			end
+
+			formspec = formspec:sub(1, -2) -- Remove trailing comma
+			formspec = formspec .. ";"..pcontext.quest..";false]"
+		else
+			formspec = formspec .. "label[0,2.4;\"I don't have any quests for you\"]"
+		end
+	else
+		formspec = formspec .. "label[0,2.4;\"I don't have anything to say\"]"
+	end
+
+	minetest.show_formspec(pname, "npcform", formspec)
+end
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+	if formname ~= "npcform" or not fields then return end
+
+	local pname = player:get_player_name()
+
+	if not context[pname] then
+		minetest.log("error", "Player submitted fields without context")
+		minetest.close_formspec(pname, "npcform")
+
+		return true
+	end
+
+	local update_form = false
+
+	-- Update selected tab if changed
+	if fields.convos then
+		context[pname].tab = tonumber(fields.convos)
+
+		update_form = true
+	end
+
+	if fields.quests then
+		local event = minetest.explode_textlist_event(fields.quests)
+
+		if (event.type == "CHG" or event.type == "DCL") and event.index ~= context[pname].quest then
+			context[pname].quest = event.index
+			update_form = true
+		elseif event.type == "DCL" then
+			vk_quests.start_quest(pname, context[pname].quests[event.index])
+			update_form = true
+		end
+	end
+
+	if update_form then
+		vk_quests.show_npc_form(pname, context[pname])
+	end
+
+	return true
+end)
+
 register_npc("blacksmith", {
 	texture = "vk_npcs_blacksmith.png",
 	hit_replies = default_hit_replies,
@@ -86,6 +221,18 @@ register_npc("stable_man", {
 register_npc("guard", {
 	texture = "vk_npcs_guard.png",
 	hit_replies = default_hit_replies,
+	convos = {
+		Quests = {
+			"kill_spider:spider",
+		},
+		Rumors = {
+			["I hear the tavern keeper doesn't actually sell any drinks, she just stands there, staring"] = {
+				["Do they pay you money if you win?"] = "You'll have to wait in line, "..
+						"they've been having a staring contest with their customers for 3 days now",
+				["uhhhhh, bye"] = "Farewell",
+			}
+		}
+	}
 })
 
 register_npc("tavern_keeper", {

mods/vk_npcs/mod.conf

@@ -1,2 +1,2 @@
 name = vk_npcs
-depends = vk_mapgen
+depends = vk_mapgen, vk_quests

mods/vk_players/vk_player/init.lua

@@ -23,3 +23,15 @@ local dirs = { -- Lua files to include
 for _, filename in ipairs(dirs) do
 	dofile(minetest.get_modpath(minetest.get_current_modname()).."/"..filename)
 end
+
+function players.set_int(player, key, newval)
+	local meta = player:get_meta()
+
+	if key == "gold" then
+		players.set_gold(player, newval)
+	elseif key == "xp" then
+		players.add_xp(player, newval - player:get_meta():get_int("xp"))
+	else
+		meta:set_int(key, newval)
+	end
+end

mods/vk_quests/init.lua

@@ -1,7 +1,108 @@
 vk_quests = {}
+vk_quest = {}
 
 local modname = minetest.get_current_modname()
 
-function vk_quests.on_enemy_death(enemy, slayer)
+local nextid = 1
+function vk_quests.register_quest(type, name, def)
+	def.qid = nextid
+	nextid = nextid + 1
 
+	if type == "kill" then
+		if not def.on_complete then
+			def.on_complete = function(player)
+				local meta = player:get_meta()
+
+				for key, addition in pairs(def.rewards) do
+					players.set_int(player, key, meta:get_int(key) + addition)
+				end
+
+				minetest.chat_send_player(player:get_player_name(), "You completed quest \""..def.description.."\"!")
+				vk_quests.finish_quest(player, def.qid)
+			end
+		end
+	end
+
+	vk_quest[type.."_"..name] = def
 end
+
+function vk_quests.get_quest(id)
+	for name, quest in pairs(vk_quest) do
+		if quest.qid == id then
+			return quest, name
+		end
+	end
+end
+
+function vk_quests.start_quest(player, id)
+	local unfinished_quests = vk_quests.get_unfinished_quests(player)
+
+	unfinished_quests[id] = {}
+
+	vk_quests.set_unfinished_quests(player, unfinished_quests)
+end
+
+function vk_quests.finish_quest(player, id)
+	local unfinished_quests = vk_quests.get_unfinished_quests(player)
+
+	unfinished_quests[id] = nil
+
+	vk_quests.set_unfinished_quests(player, unfinished_quests)
+end
+
+function vk_quests.get_unfinished_quest(player, id)
+	player = vkore.playerObj(player)
+
+	local meta = player:get_meta()
+	local unfinished_quests = minetest.deserialize(meta:get_string("unfinished_quests")) or {}
+
+	return unfinished_quests and unfinished_quests[id] or nil
+end
+
+function vk_quests.get_unfinished_quests(player)
+	player = vkore.playerObj(player)
+
+	return minetest.deserialize(player:get_meta():get_string("unfinished_quests")) or {}
+end
+
+function vk_quests.set_unfinished_quests(player, unfinished_quests)
+	player = vkore.playerObj(player)
+
+	player:get_meta():set_string("unfinished_quests", minetest.serialize(unfinished_quests))
+end
+
+function vk_quests.on_enemy_death(enemy, slayer)
+	local unfinished_quests = vk_quests.get_unfinished_quests(slayer)
+
+	if unfinished_quests == {} then
+		return
+	end
+
+	for quest, progress in pairs(unfinished_quests) do
+		local questdef = vk_quest["kill_"..enemy]
+
+		if quest == questdef.qid then
+			if not progress.kills then
+				unfinished_quests[quest].kills = 0
+			end
+
+			unfinished_quests[quest].kills = unfinished_quests[quest].kills + 1
+
+			if unfinished_quests[quest].kills >= questdef.amount then
+				unfinished_quests[quest] = nil
+				questdef.on_complete(slayer)
+			end
+		end
+	end
+
+	vk_quests.set_unfinished_quests(slayer, unfinished_quests)
+end
+
+minetest.register_on_joinplayer(function(player)
+	if vk_quests.get_unfinished_quests(player) == {} then
+		vk_quests.set_unfinished_quests(player, {})
+	end
+end)
+
+dofile(minetest.get_modpath(modname).."/quests.lua")
+dofile(minetest.get_modpath(modname).."/sfinv_page.lua")

mods/vk_quests/mod.conf

@@ -1 +1,2 @@
 name = vk_quests
+depends = sfinv, vkore

mods/vk_quests/quests.lua

@@ -0,0 +1,14 @@
+vk_quests.register_quest("kill", "spider:spider", {
+	description = "Kill 10 spiders",
+	comments = {
+		"I've been seeing too many spiders recently",
+		"I'm planning on starting a fly collection but there's too much competition",
+		"A spider ate my cousin Joe, but I recently took a sharpened stick to the knee so I can't avenge him myself"
+	},
+	amount = 10,
+	rewards_description = "Rewards: 5 gold and 15 xp",
+	rewards = {
+		xp = 15,
+		gold = 5,
+	},
+})

mods/vk_quests/sfinv_page.lua

@@ -0,0 +1,41 @@
+sfinv.register_page("vk_quests:quests", {
+	title = "Quests",
+	get = function(self, player, context)
+		if not context then context = {} end
+		-- Active quest count
+		local aquest_count = #vk_quests.get_unfinished_quests(player)
+		local formspec = ([[
+			real_coordinates[true]
+			label[3.5,0.5;Current quests in progress: %d]
+			button[4.2,0.8;2,0.6;refresh;Refresh]
+		]]):format(
+			aquest_count
+		)
+
+		if aquest_count > 0 then
+			formspec = formspec .. "textlist[0,1.6;10.5,4.1;quests;"
+
+			for qid, questprog in pairs(vk_quests.get_unfinished_quests(player)) do
+				local quest = vk_quests.get_quest(qid)
+
+				formspec = ("%s\\[%d/%d\\] %s - %s,"):format(
+					formspec,
+					questprog.kills or 0,
+					quest.amount,
+					minetest.formspec_escape(quest.description),
+					minetest.formspec_escape(quest.rewards_description)
+				)
+			end
+
+			formspec = formspec:sub(1, -2) -- Remove trailing comma
+			formspec = formspec .. ";0;true]"
+		end
+
+		return sfinv.make_formspec(player, context, formspec, true)
+	end,
+	on_player_receive_fields = function(self, player, context, fields)
+		if fields.refresh then
+			sfinv.set_page(player, "vk_quests:quests")
+		end
+	end
+})