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    Farthest Frontier

    This module allows templates and modules to be easily translated as part of the multilingual templates and modules project. Instead of storing English text in a module or a template, TNT module allows modules to be designed language-neutral, and store multilingual text in the tabular data pages on Commons. This way your module or template will use those translated strings (messages), or if the message has not yet been translated, will fallback to English. When someone updates the translation table, your page will automatically update (might take some time, or you can purge it), but no change in the template or module is needed on any of the wikis. This process is very similar to MediaWiki's localisation, and supports all standard localization conventions such as {{PLURAL|...}} and other parameters.

    This module can be used from templates using #invoke, and from other modules. For a simple example, see Data:I18n/Template:Graphs.tab - a table with two messages, each message having a single parameter. By convention, all translation tables should have '''Data:I18n/...''' prefix to separate them from other types of data.

    Using from Templates[edit source]

    Description Wiki Markup
    In a template, this command translates source_table message using Commons' Data:I18n/Template:Graphs.tab translation table.
    {{#invoke:TNT | msg
    | I18n/Template:Graphs.tab
    | source_table
    }}
    
    If your message contains parameters, you can specify them after the message ID.
    {{#invoke:TNT | msg
    | I18n/Template:My Template.tab
    | message-with-two-params
    | param1
    | param2
    }}
    

    Translating Template Parameters[edit source]

    Template parameters are usually stored as a JSON templatedata block inside the template's /doc subpage. This makes it convenient to translate, but when a new parameter is added to a global template, all /doc pages need to be updated in every language. TNT helps with this by automatically generating the templatedata block from a table stored on Commons. Placing this line into every /doc sub-page will use Data:Templatedata/Graph:Lines.tab table to generate all the needed templatedata information in every language. Even if the local community has not translated the full template documentation, they will be able to see all template parameters, centrally updated.
    {{#invoke:TNT | doc | Graph:Lines }}
    

    Using from Modules[edit source]

    Just like templates, modules should also use this module for localization:

    local TNT = require('Module:TNT')
    
    -- format <messageId> string with two parameters using a translation table.
    local text = TNT.format('I18n/My_module_messages', 'messageId', 'param1', 'param2', ...)
    
    -- Same, but translate to a specific language.
    local text = TNT.formatInLanguage('fr', 'I18n/My_module_messages', 'messageId', 'param1', 'param2', ...)
    

    Using TNTTools[edit source]

    Module:TNTTools has:

    • Question functions: with boolean or numerical indexed return. To be called from other modules or from templates. With:
      • Case sensitive option.
      • Possibility of more than one translated text value (where each value is separated by "|").
    • To put aside write, adding "I18n/" as a prefix and ".tab" extension as a suffix for the table names.
    • Several examples.

    --
    -- INTRO:   (!!! DO NOT RENAME THIS PAGE !!!)
    --    This module allows any template or module to be copy/pasted between
    --    wikis without any translation changes. All translation text is stored
    --    in the global  Data:*.tab  pages on Commons, and used everywhere.
    --
    -- SEE:   https://www.mediawiki.org/wiki/Multilingual_Templates_and_Modules
    --
    -- ATTENTION:
    --    Please do NOT rename this module - it has to be identical on all wikis.
    --    This code is maintained at https://www.mediawiki.org/wiki/Module:TNT
    --    Please do not modify it anywhere else, as it may get copied and override your changes.
    --    Suggestions can be made at https://www.mediawiki.org/wiki/Module_talk:TNT
    --
    -- DESCRIPTION:
    --    The "msg" function uses a Commons dataset to translate a message
    --    with a given key (e.g. source-table), plus optional arguments
    --    to the wiki markup in the current content language.
    --    Use lang=xx to set language.  Example:
    --
    --    {{#invoke:TNT | msg
    --     | I18n/Template:Graphs.tab  <!-- https://commons.wikimedia.org/wiki/Data:I18n/Template:Graphs.tab -->
    --     | source-table              <!-- uses a translation message with id = "source-table" -->
    --     | param1 }}                 <!-- optional parameter -->
    --
    --
    --    The "doc" function will generate the <templatedata> parameter documentation for templates.
    --    This way all template parameters can be stored and localized in a single Commons dataset.
    --    NOTE: "doc" assumes that all documentation is located in Data:Templatedata/* on Commons.
    --
    --    {{#invoke:TNT | doc | Graph:Lines }}
    --        uses https://commons.wikimedia.org/wiki/Data:Templatedata/Graph:Lines.tab
    --        if the current page is Template:Graph:Lines/doc
    --
    
    local p = {}
    local i18nDataset = 'I18n/Module:TNT.tab'
    
    -- Forward declaration of the local functions
    local sanitizeDataset, loadData, link, formatMessage
    
    function p.msg(frame)
    	local dataset, id
    	local params = {}
    	local lang = nil
    	for k, v in pairs(frame.args) do
    		if k == 1 then
    			dataset = mw.text.trim(v)
    		elseif k == 2 then
    			id = mw.text.trim(v)
    		elseif type(k) == 'number' then
    			params[k - 2] = mw.text.trim(v)
    		elseif k == 'lang' and v ~= '_' then
    			lang = mw.text.trim(v)
    		end
    	end
    	return formatMessage(dataset, id, params, lang)
    end
    
    -- Identical to p.msg() above, but used from other lua modules
    -- Parameters:  name of dataset, message key, optional arguments
    -- Example with 2 params:  format('I18n/Module:TNT', 'error_bad_msgkey', 'my-key', 'my-dataset')
    function p.format(dataset, key, ...)
    	local checkType = require('libraryUtil').checkType
    	checkType('format', 1, dataset, 'string')
    	checkType('format', 2, key, 'string')
    	return formatMessage(dataset, key, {...})
    end
    
    
    -- Identical to p.msg() above, but used from other lua modules with the language param
    -- Parameters:  language code, name of dataset, message key, optional arguments
    -- Example with 2 params:  formatInLanguage('es', I18n/Module:TNT', 'error_bad_msgkey', 'my-key', 'my-dataset')
    function p.formatInLanguage(lang, dataset, key, ...)
    	local checkType = require('libraryUtil').checkType
    	checkType('formatInLanguage', 1, lang, 'string')
    	checkType('formatInLanguage', 2, dataset, 'string')
    	checkType('formatInLanguage', 3, key, 'string')
    	return formatMessage(dataset, key, {...}, lang)
    end
    
    -- Obsolete function that adds a 'c:' prefix to the first param.
    -- "Sandbox/Sample.tab" -> 'c:Data:Sandbox/Sample.tab'
    function p.link(frame)
    	return link(frame.args[1])
    end
    
    function p.doc(frame)
    	local dataset = 'Templatedata/' .. sanitizeDataset(frame.args[1])
    	return frame:extensionTag('templatedata', p.getTemplateData(dataset)) ..
    		   formatMessage(i18nDataset, 'edit_doc', {link(dataset)})
    end
    
    function p.getTemplateData(dataset)
    	-- TODO: add '_' parameter once lua starts reindexing properly for "all" languages
    	local data = loadData(dataset)
    	local names = {}
    	for _, field in ipairs(data.schema.fields) do
    		table.insert(names, field.name)
    	end
    
    	local params = {}
    	local paramOrder = {}
    	for _, row in ipairs(data.data) do
    		local newVal = {}
    		local name = nil
    		for pos, columnName in ipairs(names) do
    			if columnName == 'name' then
    				name = row[pos]
    			else
    				newVal[columnName] = row[pos]
    			end
    		end
    		if name then
    			params[name] = newVal
    			table.insert(paramOrder, name)
    		end
    	end
    
    	-- Work around json encoding treating {"1":{...}} as an [{...}]
    	params['zzz123']=''
    
    	local json = mw.text.jsonEncode({
    		params=params,
    		paramOrder=paramOrder,
    		description=data.description
    	})
    
    	json = string.gsub(json,'"zzz123":"",?', "")
    
    	return json
    end
    
    -- Local functions
    
    sanitizeDataset = function(dataset)
    	if not dataset then
    		return nil
    	end
    	dataset = mw.text.trim(dataset)
    	if dataset == '' then
    		return nil
    	elseif string.sub(dataset,-4) ~= '.tab' then
    		return dataset .. '.tab'
    	else
    		return dataset
    	end
    end
    
    loadData = function(dataset, lang)
    	dataset = sanitizeDataset(dataset)
    	if not dataset then
    		error(formatMessage(i18nDataset, 'error_no_dataset', {}))
    	end
    
    	-- Give helpful error to thirdparties who try and copy this module.
    	if not mw.ext or not mw.ext.data or not mw.ext.data.get then
    		error('Missing JsonConfig extension; Cannot load https://commons.wikimedia.org/wiki/Data:' .. dataset)
    	end
    
    	local data = mw.ext.data.get(dataset, lang)
    
    	if data == false then
    		if dataset == i18nDataset then
    			-- Prevent cyclical calls
    			error('Missing Commons dataset ' .. i18nDataset)
    		else
    			error(formatMessage(i18nDataset, 'error_bad_dataset', {link(dataset)}))
    		end
    	end
    	return data
    end
    
    -- Given a dataset name, convert it to a title with the 'commons:data:' prefix
    link = function(dataset)
    	return 'c:Data:' .. mw.text.trim(dataset or '')
    end
    
    formatMessage = function(dataset, key, params, lang)
    	for _, row in pairs(loadData(dataset, lang).data) do
    		local id, msg = unpack(row)
    		if id == key then
    			local result = mw.message.newRawMessage(msg, unpack(params or {}))
    			return result:plain()
    		end
    	end
    	if dataset == i18nDataset then
    		-- Prevent cyclical calls
    		error('Invalid message key "' .. key .. '"')
    	else
    		error(formatMessage(i18nDataset, 'error_bad_msgkey', {key, link(dataset)}))
    	end
    end
    
    return p
    
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