101 lines
2.9 KiB
Lua
101 lines
2.9 KiB
Lua
 
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-- states/ingame_dialogue.lua
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--
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-- Conversations. Two things must be spoken, and they change independently:
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-- * the NPC's line (speaker name + message blocks) -- changes when the node does
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-- * the currently selected response -- changes as you press up/down
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--
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-- So this tracks the node itself and announces the full block on a node change,
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-- but only the option on a selection change. Repeating the whole speech every
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-- time you move between responses would be unusable.
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--
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-- Responses can also be picked directly with the number keys 1-0, which the game
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-- already supports and which is the fastest way to work through a conversation.
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local descriptor = {}
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local lastNodeKey
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local function nodeKeyFor(speakerName, blocks, options)
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local parts = {tostring(speakerName), tostring(#options)}
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for _, block in ipairs(blocks or {}) do
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parts[#parts + 1] = tostring(block.text)
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end
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return table.concat(parts, "|")
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end
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descriptor.read = function(stateTable, menus)
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local keypressed = stateTable.keypressed
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local options = menus.getUpvalue(keypressed, "options")
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local selected = menus.getUpvalue(keypressed, "selectedOption")
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if type(options) ~= "table" or type(selected) ~= "number" then
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return nil, nil
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end
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-- speakerName / messageTextBlocks are not touched by keypressed directly --
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-- it calls updateText(), so they are upvalues of that function.
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local updateText = menus.getUpvalue(keypressed, "updateText")
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local speakerName, blocks
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if type(updateText) == "function" then
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speakerName = menus.getUpvalue(updateText, "speakerName")
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blocks = menus.getUpvalue(updateText, "messageTextBlocks")
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end
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local nodeKey = nodeKeyFor(speakerName, blocks, options)
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local option = options[selected]
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local optionText = option and option.text or nil
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-- Selection moved within the same node: just the response.
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if nodeKey == lastNodeKey then
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if not optionText then
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return nil, nil
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end
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return string.format("%s, %d of %d", optionText, selected, #options),
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nodeKey .. ":" .. selected
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end
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-- New node: speaker, what they said, then the options.
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lastNodeKey = nodeKey
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local parts = {}
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if speakerName and speakerName ~= "" then
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parts[#parts + 1] = speakerName
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end
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for _, block in ipairs(blocks or {}) do
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if block.text then
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parts[#parts + 1] = block.text
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end
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end
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if #options > 0 then
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parts[#parts + 1] = #options .. (#options == 1 and " response" or " responses")
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for i, entry in ipairs(options) do
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if entry.text then
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-- The game already prefixes response text with its number
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-- ("1. (Continue)"), matching the number keys that select it.
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-- Adding our own gave "1. 1. (Continue)".
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if entry.text:match("^%s*%d+%s*[%.%)]") then
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parts[#parts + 1] = entry.text
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else
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parts[#parts + 1] = i .. ". " .. entry.text
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end
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end
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end
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end
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if #parts == 0 then
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return nil, nil
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end
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return table.concat(parts, ". "), nodeKey .. ":" .. selected
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end
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return descriptor
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