From 80e3204596f9ab48a350a322e91d78b2a095cf33 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ccxvii.net>
Date: Thu, 7 Dec 2023 14:01:50 +0100
Subject: Add support for random scenario selection and scenario groupings.

---
 public/join.js   |  4 ++++
 server.js        | 27 ++++++++++++++++++++++++---
 views/create.pug | 23 ++++++++++++++++++-----
 3 files changed, 46 insertions(+), 8 deletions(-)

diff --git a/public/join.js b/public/join.js
index 704868f..e51b548 100644
--- a/public/join.js
+++ b/public/join.js
@@ -148,6 +148,10 @@ function action_link(player, action, color, text) {
 }
 
 function update() {
+	if (game.scenario !== "Standard")
+		document.querySelector("h1").textContent = game.title_name + " - " + game.scenario
+	else
+		document.querySelector("h1").textContent = game.title_name
 	for (let i = 0; i < roles.length; ++i) {
 		let role = roles[i]
 		let role_id = "role_" + role.replace(/ /g, "_")
diff --git a/server.js b/server.js
index 2910e36..7f87bf5 100644
--- a/server.js
+++ b/server.js
@@ -1189,6 +1189,7 @@ const SQL_FINISH_GAME = SQL(`
 `)
 
 const SQL_UPDATE_GAME_ACTIVE = SQL("update games set active=?,mtime=datetime(),moves=moves+1 where game_id=?")
+const SQL_UPDATE_GAME_SCENARIO = SQL("update games set scenario=? where game_id=?")
 
 const SQL_SELECT_GAME_STATE = SQL("select state from game_state where game_id=?").pluck()
 const SQL_INSERT_GAME_STATE = SQL("insert or replace into game_state (game_id,state) values (?,?)")
@@ -1624,6 +1625,18 @@ function options_json_replacer(key, value) {
 	return value
 }
 
+function is_random_scenario(title_id, scenario) {
+	if (RULES[title_id].is_random_scenario)
+		return RULES[title_id].is_random_scenario(scenario)
+	return false
+}
+
+function select_random_scenario(title_id, scenario, seed) {
+	if (RULES[title_id].select_random_scenario)
+		return RULES[title_id].select_random_scenario(scenario, seed)
+	return scenario
+}
+
 app.post("/create/:title_id", must_be_logged_in, function (req, res) {
 	let title_id = req.params.title_id
 	let priv = req.body.is_private === "true" ? 1 : 0
@@ -1640,8 +1653,9 @@ app.post("/create/:title_id", must_be_logged_in, function (req, res) {
 
 	if (!(title_id in RULES))
 		return res.send("Invalid title.")
-	if (!RULES[title_id].scenarios.includes(scenario))
-		return res.send("Invalid scenario.")
+
+	if (is_random_scenario(title_id, scenario))
+		rand = 1
 
 	let player_count = get_game_roles(title_id, scenario, parse_game_options(options)).length
 
@@ -1936,13 +1950,20 @@ app.post('/start/:game_id', must_be_logged_in, function (req, res) {
 function start_game(game) {
 	let options = parse_game_options(game.options)
 	let seed = random_seed()
-	let state = RULES[game.title_id].setup(seed, game.scenario, options)
+	let state = null
 
 	SQL_BEGIN.run()
 	try {
+		if (is_random_scenario(game.title_id, game.scenario)) {
+			game.scenario = select_random_scenario(game.title_id, game.scenario, seed)
+			SQL_UPDATE_GAME_SCENARIO.run(game.scenario, game.game_id)
+		}
+
 		if (game.is_random)
 			assign_random_roles(game, options, SQL_SELECT_PLAYERS_JOIN.all(game.game_id))
 
+		state = RULES[game.title_id].setup(seed, game.scenario, options)
+
 		SQL_START_GAME.run(state.active, game.game_id)
 		put_replay(game.game_id, null, ".setup", [seed, game.scenario, options])
 		put_snap(game.game_id, state)
diff --git a/views/create.pug b/views/create.pug
index 717c4f0..7a8a6b8 100644
--- a/views/create.pug
+++ b/views/create.pug
@@ -14,14 +14,27 @@ html
 				+gamecover(title.title_id)
 
 			form(method="post" action="/create/"+title.title_id)
-				if scenarios.length > 1
+				if Array.isArray(scenarios)
+					if scenarios.length > 1
+						p Scenario:
+							br
+							select(name="scenario")
+								each scenario in scenarios
+									option(value=scenario)= scenario
+					else
+						input(type="hidden" name="scenario" value=scenarios[0])
+				else
 					p Scenario:
 						br
 						select(name="scenario")
-							each scenario in scenarios
-								option(value=scenario)= scenario
-				else
-					input(type="hidden" name="scenario" value=scenarios[0])
+							each list, name in scenarios
+								if name === ""
+									each scenario in list
+										option(value=scenario)= scenario
+								else
+									optgroup(label=name)
+										each scenario in list
+											option(value=scenario)= scenario
 
 				| !{ title.create_html }
 
-- 
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