-- This module follows [[User:Ganaram inukshuk/Provisional style guide for Lua]]
local getArgs = require("Module:Arguments").getArgs
local iutils = require("Module:Introspection utils")
local yesno = require("Module:Yesno")
local p = {}
-- TODO: Change requirements for lua-based template
-- FROM: detect whether a corresponding page exists
-- TO: detect whether it invokes ANYTHING at all
-- Produces a hatnote that is placed on the top of a documentation page (either
-- template or module documentation) and can autodetect and categorize:
-- - FOR MODULES:
-- - whether a module has an accompanying template (overridable/toggleable)
-- - whether a module is meant as a library for other modules
-- - FOR TEMPLATES:
-- - whether a template has an accompanying module (overridable/toggleable)
-- - what functions from which modules are invoked
-- Helper function
-- Categorizes pages if they're in the right namespace, and based on the nature
-- of the page
local function categorize(namespace, pagename, is_lua_based_template)
local is_lua_based_template = is_lua_based_template or false
local cats = ""
if pagename:match("/doc$") then
-- Documentation subpages
if namespace == "Template" then
cats = "[[Category:Template documentation]]"
elseif namespace == "Module" then
cats = "[[Category:Module documentation]]"
end
else
-- Main pages
if namespace == "Template" then
cats = "[[Category:Templates]]"
if is_lua_based_template then
cats = cats .. " [[Category:Lua-based templates]]"
end
elseif namespace == "Module" then
cats = "[[Category:Lua modules]]"
else
--cats = "[[Category:Templates in the incorrect namespace]]"
end
end
return cats
end
-- Helper function to handle modules
function p.make_module_hatnote(header, pagename, corr_template, detect_corr_page)
-- Check whether corresponding template exists
-- Then check whether that template invokes the module
local has_template = iutils.page_exists("Template:" .. corr_template)
if has_template then
local wikitext = iutils.get_and_preprocess_content("Template", corr_template)
local invokes = iutils.find_invokes(wikitext)
has_template = has_template and iutils.invocation_exists(invokes, pagename)
end
-- Check whether to use detect_corr_page option
-- If the header option is dualuse, metatemplate, or noinvoke, this option
-- is ignored. For any other option, it's not.
if header ~= "dualuse" and header ~= "metatemplate" and header ~= "noinvoke" then
has_template = has_template and detect_corr_page
end
-- Heading meanings and usage on module
-- - dualuse means a template is implement by a module, but its template may
-- be bypassed by using its module directly from other modules.
-- - metatemplate is a special case of dualuse; the template-module pair is
-- for a metatemplate, a template used to build other templates.
-- - noinvoke indicates a lua-based template, but the module's code is so
-- specialized that its code should not be used by other modules or
-- invoked by other templates.
-- - metamodule and library indicate a module whose code is used mainly for
-- other modules. Such modules generally don't have a corresponding
-- template.
-- Does the module have a template?
-- - dualuse, metatemplate, and noinvoke: YES (REQUIRED!!)
-- - metamodule/library: GENERALLY NO
local result = ""
if header == "dualuse" then
if has_template then
result = string.format(
"This module may be invoked by templates using its corresponding template [[Template:%s]], or used directly from other modules.",
corr_template
)
else
result = string.format(
"This module has a corresopnding template that is currently missing or does not use this module. ([[Special:EditPage/Template:%s|edit template]])",
corr_template
)
end
elseif header == "metatemplate" then
if has_template then
result = string.format(
"This module implements a metatemplate, and may be invoked by templates using its corresponding template [[Template:%s]], or used directly from other modules.",
corr_template
)
else
result = "This module is used to create other Lua-based templates and has no corresponding template."
end
elseif header == "noinvoke" then
if has_template then
result = string.format(
"This module should not be invoked directly; use its corresponding instead: [[Template:%s]].",
corr_template
)
else
result = string.format(
"This module implements a template that is currently missing or does not use this module. ([[Special:EditPage/Template:%s|edit template]])",
corr_template
)
end
elseif header == "library" or header == "metamodule" then
result = "This module primarily serves as a library for other modules and has no corresponding template."
else
if has_template and header ~= "" then
result = string.format("%s This module implements [[Template:%s]].", header, corr_template)
elseif has_template and header == "" then
result = string.format("This module implements [[Template:%s]].", corr_template)
else
result = header
end
end
if result == "" then
return ""
else
return string.format(":''%s''", result)
end
end
-- Helper function
-- Creates an additional hatnote denoting which functions are invoked from which
-- modules, if a has more than one invoke.
local function make_invocation_hatnote(invokes)
local hatnote = ""
if #invokes == 0 then
return ""
else
hatnote = "This template invokes the following functions:"
local calls = {}
for _, call in ipairs(invokes) do
local module_link = iutils.make_module_link(call.module)
table.insert(calls, string.format("'''%s''' from %s", call.func, module_link))
end
return string.format("%s %s.", hatnote, table.concat(calls, ", "))
end
end
-- Helper function to handle templates
function p.make_template_hatnote(header, pagename, corr_module, detect_corr_page)
-- Check whether corresponding module exists
-- Then check whether this template invokes the module
local has_module = iutils.page_exists("Module:" .. corr_module)
local wikitext = iutils.get_and_preprocess_content("Template", pagename)
local invokes = iutils.find_invokes(wikitext)
local is_module_invoked = iutils.invocation_exists(invokes, corr_module)
-- Find all invocations for the template and add it as an addl hatnote.
local invocation_hatnote = make_invocation_hatnote(invokes)
-- Check whether to use detect_corr_page option
-- If the header option is dualuse or metatemplate, this option is ignored.
-- For any other option, it's not (although it also has no effect on
-- noinvoke or library/metamodule).
if header ~= "dualuse" and header ~= "metatemplate" then
has_module = has_module and detect_corr_page
end
-- Heading meanings and usage on templates
-- - dualuse means a template is implement by a module, but its template may
-- be bypassed by using its module directly from other modules.
-- - metatemplate is a special case of dualuse; the template-module pair is
-- for a metatemplate, a template used to build other templates.
-- - noinvoke and metamodule/library don't have use for templates.
-- Does the template have a module?
-- - dualuse and metatemplate: YES (REQUIRED!!)
-- - noinvoke and metamodule/library: options don't apply to templates.
-- RATIONALE FOR NOINVOKE NOT APPLYING: a template may invoke functions from
-- more than one module, but one of them must be the "main" module. Since
-- there's no way to autodetect that, that info must be manually entered.
-- If that doesn't happen
local result = ""
if header == "dualuse" then
if has_module and is_module_invoked then
result = string.format(
"This template is implemented by the Lua module [[Module:%s]]. See its module page for Lua-based template implementation.",
corr_module
)
elseif has_module and not is_module_invoked then
result = string.format(
"This template has a corresponding Lua module [[Module:%s]], but does not invoke its functions.",
corr_module
)
else
result = string.format(
"This template is implemented by a module that is currently missing. [[Special:EditPage/Module:%s]]",
corr_module
)
end
elseif header == "metatemplate" then
if has_module and is_module_invoked then
result = string.format(
"This template is a metatemplate. It is used to build other templates and should not be used standalone, except for testing or simple usage. This template is implemented by the Lua module [[Module:%s]].",
corr_module
)
elseif has_module and not is_module_invoked then
result = string.format(
"This metatemplate has a corresponding Lua module [[Module:%s]], but does not invoke its functions.",
corr_module
)
else
result = "This template is a metatemplate. It is used to build other templates and should not be used standalone, except for testing or simple usage."
end
elseif header == "noinvoke" or header == "library" or header == "metamodule" then
result = "This template has a header option in the wrong namespace. It should be used within the Module namespace."
else
if has_module and header ~= "" and is_module_invoked then
result = string.format(
"%s. This template is implemented by the Lua module [[Module:%s]].",
header,
corr_module
)
elseif has_module and header ~= "" and not is_module_invoked then
result = string.format(
"%s. This template has a corresponding Lua module [[Module:%s]], but does not invoke its functions.",
header,
corr_module
)
elseif has_module and header == "" and is_module_invoked then
result = string.format(
"This template is implemented by the Lua module [[Module:%s]].",
corr_module
)
elseif has_module and header == "" and not is_module_invoked then
result = string.format(
"This template has a corresponding Lua module [[Module:%s]], but does not invoke its functions.",
corr_module
)
else
result = header
end
end
if result == "" and invocation_hatnote == "" then
return ""
elseif result == "" and invocation_hatnote ~= "" then
return string.format(":''%s''", invocation_hatnote)
elseif result ~= "" and invocation_hatnote == "" then
return string.format(":''%s''", result)
else
return string.format(":''%s''\n:''%s''", result, invocation_hatnote)
end
end
-- Main function
function p._dochead(args)
local namespace = args["namespace"]
local pagename = args["pagename"]
local header = args["header"] or "none"
local corr_template = args["temp"] or pagename
local corr_module = args["mod"] or pagename
local detect_corr_page = args["detect_corr_page"]
-- If header is none, skip everything
if header == "none" then
return categorize(namespace, pagename)
end
-- Call appropriate hatnote-making function
-- Remove /doc suffix if this is on a /doc page to ensure links are made
-- properly.
local result = ""
if namespace == "Module" then
result = p.make_module_hatnote(header, pagename:gsub("/doc$", ""), corr_template:gsub("/doc$", ""), detect_corr_page)
elseif namespace == "Template" then
result = p.make_template_hatnote(header, pagename:gsub("/doc$", ""), corr_module:gsub("/doc$", ""), detect_corr_page)
else
result = ":''This documentation template is in the wrong namespace. It should be within the Template or Module namespaces.''\n"
end
-- Categorization and output
-- has_link only has an effect if this is used for template documentation.
local has_link = namespace == "Template" and iutils.page_exists("Module:" .. corr_module)
if result == "" then
return categorize(namespace, pagename, has_link)
else
return string.format("%s%s\n", result, categorize(namespace, pagename, has_link))
end
end
-- Wrapper to be invoked
function p.dochead(frame)
local args = getArgs(frame, { removeBlanks = true }) or {}
local title = mw.title.getCurrentTitle()
-- Extract or parse args
args["namespace"] = args["namespace"] or title.nsText
args["pagename" ] = args["pagename" ] or title.text
-- Extract header or set it to defaults
if args["header"] == nil or args["header"] == "" then
if args["namespace"] == "Module" then
args["header"] = "noinvoke"
else
args["header"] = ""
end
end
-- Extract template/module names, or autogenerate them
args["temp"] = args["temp"] or args["pagename"]
args["mod" ] = args["mod" ] or args["pagename"]
-- Option to detect corresponding page (default true)
args["detect_corr_page"] = args["detect_corr_page"] == nil and true or yesno(args["detect_corr_page"])
return p._dochead(args)
end
function p.tester()
local args = {}
args["namespace"] = "Template"
args["pagename" ] = "Module introspection"
args["temp"] = args["pagename"]
args["mod" ] = args["pagename"]
args["header"] = ""
return p._dochead(args)
end
return p
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