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Modul:Wikidata

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-- Modulet gør det muligt at vise værdier fra Wikidata. Der er tale om en kopi fra den spanske Wikis Wikidata-modul

local i18n = {
    ["errors"] = {
        ["property-param-not-provided"] = "Property parameter not provided.",
        ["entity-not-found"] = "Entity not found.",
        ["unknown-claim-type"] = "Unknown claim type.",
        ["unknown-snak-type"] = "Unknown snak type.",
        ["unknown-datavalue-type"] = "Unknown datavalue type.",
        ["unknown-entity-type"] = "Unknown entity type.",
        ["unknown-value-module"] = "You must set both value-module and value-function parameters.",
        ["value-module-not-found"] = "The module pointed by value-module not found.",
        ["value-function-not-found"] = "The function pointed by value-function not found."
    },
    ["somevalue"] = "''unknown value''",
    ["novalue"] = "''no value''"
}

function getEntityFromId( id )
    return mw.wikibase.getEntityObject() --TODO support for getting other entities
end

function getEntityIdFromValue( value )
    if value['entity-type'] == 'item' then
        return 'q' .. value['numeric-id']
    elseif value['entity-type'] == 'property' then
        return 'p' .. value['numeric-id']
    else
        return formatError( 'unknown-entity-type' )
    end
end

function formatError( key )
    return '<span class="error">' .. i18n.errors[key] .. '</span>'
end


function formatStatements( options )
    if not options.property then
        return formatError( 'property-param-not-provided' )
    end

    --Get entity
    local entity = nil
    if options.entity and type( options.entity ) == "table" then
        entity = options.entity
    else
        entity = getEntityFromId( options.entityId )
    end

    if not entity then
        return '' --TODO error?
    end

    if not entity.claims or not entity.claims[options.property] then
        return '' --TODO error?
    end

    --Format statement and concat them cleanly
    local formattedStatements = {}
    for i, statement in pairs( entity.claims[options.property] ) do
        if options.rank == 'one' then
            return formatStatement( statement, options ) --Output only one value
        else
            table.insert( formattedStatements, formatStatement( statement, options ) )
        end
    end
    return mw.text.listToText( formattedStatements, options.separator, options.conjunction )
end

function formatStatement( statement, options )
    if not statement.type or statement.type ~= 'statement' then
        return formatError( 'unknown-claim-type' )
    end

    return formatSnak( statement.mainsnak, options )
    --TODO reference and qualifiers
end

function formatSnak( snak, options )
    if snak.snaktype == 'somevalue' then
        return i18n['somevalue']
    elseif snak.snaktype == 'novalue' then
        return i18n['novalue']
    elseif snak.snaktype == 'value' then
        return formatDatavalue( snak.datavalue, options )
    else
        return formatError( 'unknown-snak-type' )
    end
end

function formatDatavalue( datavalue, options )
    --Use the customize handler if provided
    if options['value-module'] or options['value-function'] then
        if not options['value-module'] or not options['value-function'] then
            return formatError( 'unknown-value-module' )
        end
        local formatter = require ('Module:' .. options['value-module'])
        if not formatter then
            return formatError( 'value-module-not-found' )
        end
        local fun = formatter[options['value-function']]
        if not fun then
            return formatError( 'value-function-not-found' )
        end
        return fun( datavalue.value, options )
    end

    --Default formatters
    if options.property == 'latitud' then --Para las coordenadas
        return datavalue.value['latitude']
    elseif options.property == 'longitud' then
        return datavalue.value['longitude']

    elseif datavalue.type == 'wikibase-entityid' then
        return formatEntityId( getEntityIdFromValue( datavalue.value ), options )
    elseif datavalue.type == 'string' then
        if options.pattern and options.pattern ~= '' then
            return formatFromPattern( datavalue.value, options )
        else
            return datavalue.value
        end
    elseif datavalue.type == 'time' then
        local Time = require 'Module:Time'
        return Time.newFromWikidataValue( datavalue.value ):toHtml()
    elseif  datavalue.value['latitude']  and datavalue.value['longitude'] then 
        return  marco:preprocess('{{coord|' .. datavalue.value['latitude'] .. '|' .. 
                   datavalue.value['longitude'] .. '|type:' .. options.tipo .. '|display=' .. 
                   options.display ..'|format=' .. options.formato..'}}')
    else
        return formatError( 'unknown-datavalue-type' )
    end
end

function formatEntityId( entityId, options )
    local label = mw.wikibase.label( entityId )
    local link = mw.wikibase.sitelink( entityId )
    if link then
        if label then
            return '[[' .. link .. '|' .. label .. ']]'
        else
            return '[[' .. link .. ']]'
        end
    else
        return label --TODO what if no links and label + fallback language?
    end
end

function formatFromPattern( str, options )
    return mw.ustring.gsub( options.pattern, '$1', str ) .. '' --Hack to get only the first result of the function
end

local p = {}

function p.formatStatements( frame )
	marco = frame
    local args = frame.args

    --If a value if already set, use it
    if args.value and args.value ~= '' then
        return args.value
    end
    return formatStatements( frame.args )
end

function p.formatStatementsFromLua( options )
    --If a value if already set, use it
    if options.value and options.value ~= '' then
        return options.value
    end
    return formatStatements( options )
end

-- Return the site link (for the current site) for a given data item.
function p.getSiteLink(frame)
    if frame.args[1] == nil then
        entity = mw.wikibase.getEntityObject()
        if not entity then return nil end
            id = entity.id
    else
        id = frame.args[1]
    end
 
    return mw.wikibase.sitelink( id )
end

return p