Module:DatasetLoader

Documentation for this module may be created at Module:DatasetLoader/doc

-- Module:DatasetLoader
-- Central loader for Data: JSON assets via JsonConfig or mw.loadData, cached per render

local DatasetLoader = {}
local cache = {}

-- Retrieve a dataset by name (without extension). Returns a Lua table or {}.
function DatasetLoader.get(name)
    -- Return cached if available
    if cache[name] then
        return cache[name]
    end

    -- Ensure filename has .json extension
    local fullName = name
    if not fullName:match('%.%w+$') then
        fullName = fullName .. '.json'
    end

    local data
    local loadMethod = "none"

    -- Try JsonConfig extension (mw.ext.data.get)
    local success, result = pcall(function()
        return mw.ext.data.get(fullName)
    end)
    if success and type(result) == 'table' then
        data = result
        loadMethod = "JsonConfig"
    else
        -- Fallback to mw.loadData from Data: namespace
        success, result = pcall(function()
            return mw.loadData('Data:' .. fullName)
        end)
        if success and type(result) == 'table' then
            data = result
            loadMethod = "mw.loadData"
        end
    end

    -- Default to empty table on any failure
    if not data or type(data) ~= 'table' then
        data = {}
        loadMethod = "failed"
    end

    -- DEBUG: Log what we loaded for any Campaign request
    if name:match("Campaigns/") then
        local ErrorHandling = require('Module:ErrorHandling')
        local context = ErrorHandling.createContext('DatasetLoader')
        ErrorHandling.addStatus(context, 'datasetLoader', 'Campaign request: "' .. name .. '" via ' .. loadMethod, 'FullName: "' .. fullName .. '"')
        
        if data and type(data) == "table" then
            if data.defaults then
                local titleValue = data.defaults.title or "MISSING"
                ErrorHandling.addStatus(context, 'datasetLoader', 'Campaign data structure found', 'Title field: "' .. tostring(titleValue) .. '"')
            else
                local keys = {}
                for k, v in pairs(data or {}) do
                    table.insert(keys, tostring(k))
                end
                ErrorHandling.addStatus(context, 'datasetLoader', 'Campaign data loaded but no defaults', 'Keys: ' .. table.concat(keys, ", "))
            end
        else
            ErrorHandling.addStatus(context, 'datasetLoader', 'Campaign data load failed', 'Data type: ' .. type(data))
        end
        
        -- Force output the debug info immediately
        mw.log(ErrorHandling.formatCombinedOutput(context))
    end

    -- Cache and return
    cache[name] = data
    return data
end

return DatasetLoader