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| --------------------------------------------------------------------------------
| | local p = 3 |
| -- --
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| -- CATEGORY HANDLER --
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| -- --
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| -- This module implements the {{category handler}} template in Lua, --
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| -- with a few improvements: all namespaces and all namespace aliases --
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| -- are supported, and namespace names are detected automatically for --
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| -- the local wiki. This module requires [[Module:Namespace detect]] --
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| -- and [[Module:Yesno]] to be available on the local wiki. It can be --
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| -- configured for different wikis by altering the values in --
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| -- [[Module:Category handler/config]], and pages can be blacklisted --
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| -- from categorisation by using [[Module:Category handler/blacklist]]. --
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| -- --
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| --------------------------------------------------------------------------------
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| -- Load required modules
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| local yesno = require('Module:Yesno')
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| -- Lazily load things we don't always need
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| local mShared, mappings
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| local p = {} | |
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| --------------------------------------------------------------------------------
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| -- Helper functions
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| --------------------------------------------------------------------------------
| |
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| local function trimWhitespace(s, removeBlanks)
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| if type(s) ~= 'string' then
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| return s
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| end
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| s = s:match('^%s*(.-)%s*$')
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| if removeBlanks then
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| if s ~= '' then
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| return s
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| else
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| return nil
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| end
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| else
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| return s
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| end
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| end
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| --------------------------------------------------------------------------------
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| -- CategoryHandler class
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| --------------------------------------------------------------------------------
| |
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| local CategoryHandler = {}
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| CategoryHandler.__index = CategoryHandler
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| function CategoryHandler.new(data, args)
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| local obj = setmetatable({ _data = data, _args = args }, CategoryHandler)
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|
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| -- Set the title object
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| do
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| local pagename = obj:parameter('demopage')
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| local success, titleObj
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| if pagename then
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| success, titleObj = pcall(mw.title.new, pagename)
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| end
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| if success and titleObj then
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| obj.title = titleObj
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| if titleObj == mw.title.getCurrentTitle() then
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| obj._usesCurrentTitle = true
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| end
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| else
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| obj.title = mw.title.getCurrentTitle()
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| obj._usesCurrentTitle = true
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| end
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| end
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| | |
| -- Set suppression parameter values
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| for _, key in ipairs{'nocat', 'categories'} do
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| local value = obj:parameter(key)
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| value = trimWhitespace(value, true)
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| obj['_' .. key] = yesno(value)
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| end
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| do
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| local subpage = obj:parameter('subpage')
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| local category2 = obj:parameter('category2')
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| if type(subpage) == 'string' then
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| subpage = mw.ustring.lower(subpage)
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| end
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| if type(category2) == 'string' then
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| subpage = mw.ustring.lower(category2)
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| end
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| obj._subpage = trimWhitespace(subpage, true)
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| obj._category2 = trimWhitespace(category2) -- don't remove blank values
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| end
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| return obj
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| end
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| function CategoryHandler:parameter(key)
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| local parameterNames = self._data.parameters[key]
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| local pntype = type(parameterNames)
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| if pntype == 'string' or pntype == 'number' then
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| return self._args[parameterNames]
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| elseif pntype == 'table' then
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| for _, name in ipairs(parameterNames) do
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| local value = self._args[name]
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| if value ~= nil then
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| return value
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| end
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| end
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| return nil
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| else
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| error(string.format(
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| 'invalid config key "%s"',
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| tostring(key)
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| ), 2)
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| end
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| end
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| function CategoryHandler:isSuppressedByArguments()
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| return
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| -- See if a category suppression argument has been set.
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| self._nocat == true
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| or self._categories == false
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| or (
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| self._category2
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| and self._category2 ~= self._data.category2Yes
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| and self._category2 ~= self._data.category2Negative
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| )
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| -- Check whether we are on a subpage, and see if categories are
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| -- suppressed based on our subpage status.
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| or self._subpage == self._data.subpageNo and self.title.isSubpage
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| or self._subpage == self._data.subpageOnly and not self.title.isSubpage
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| end
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| function CategoryHandler:shouldSkipBlacklistCheck()
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| -- Check whether the category suppression arguments indicate we
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| -- should skip the blacklist check.
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| return self._nocat == false
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| or self._categories == true
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| or self._category2 == self._data.category2Yes
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| end
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| function CategoryHandler:matchesBlacklist()
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| if self._usesCurrentTitle then
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| return self._data.currentTitleMatchesBlacklist
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| else
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| mShared = mShared or require('Module:Category handler/shared')
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| return mShared.matchesBlacklist(
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| self.title.prefixedText,
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| mw.loadData('Module:Category handler/blacklist')
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| )
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| end
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| end
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| function CategoryHandler:isSuppressed()
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| -- Find if categories are suppressed by either the arguments or by
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| -- matching the blacklist.
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| return self:isSuppressedByArguments()
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| or not self:shouldSkipBlacklistCheck() and self:matchesBlacklist()
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| end
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| function CategoryHandler:getNamespaceParameters()
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| if self._usesCurrentTitle then
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| return self._data.currentTitleNamespaceParameters
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| else
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| if not mappings then
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| mShared = mShared or require('Module:Category handler/shared')
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| mappings = mShared.getParamMappings(true) -- gets mappings with mw.loadData
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| end
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| return mShared.getNamespaceParameters(
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| self.title,
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| mappings
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| )
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| end
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| end
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| function CategoryHandler:namespaceParametersExist()
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| -- Find whether any namespace parameters have been specified.
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| -- We use the order "all" --> namespace params --> "other" as this is what
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| -- the old template did.
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| if self:parameter('all') then
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| return true
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| end
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| if not mappings then
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| mShared = mShared or require('Module:Category handler/shared')
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| mappings = mShared.getParamMappings(true) -- gets mappings with mw.loadData
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| end
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| for ns, params in pairs(mappings) do
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| for i, param in ipairs(params) do
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| if self._args[param] then
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| return true
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| end
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| end
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| end
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| if self:parameter('other') then
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| return true
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| end
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| return false
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| end
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| function CategoryHandler:getCategories()
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| local params = self:getNamespaceParameters()
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| local nsCategory
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| for i, param in ipairs(params) do
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| local value = self._args[param]
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| if value ~= nil then
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| nsCategory = value
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| break
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| end
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| end
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| if nsCategory ~= nil or self:namespaceParametersExist() then
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| -- Namespace parameters exist - advanced usage.
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| if nsCategory == nil then
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| nsCategory = self:parameter('other')
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| end
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| local ret = {self:parameter('all')}
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| local numParam = tonumber(nsCategory)
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| if numParam and numParam >= 1 and math.floor(numParam) == numParam then
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| -- nsCategory is an integer
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| ret[#ret + 1] = self._args[numParam]
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| else
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| ret[#ret + 1] = nsCategory
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| end
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| if #ret < 1 then
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| return nil
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| else
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| return table.concat(ret)
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| end
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| elseif self._data.defaultNamespaces[self.title.namespace] then
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| -- Namespace parameters don't exist, simple usage.
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| return self._args[1]
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| end
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| return nil
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| end
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| --------------------------------------------------------------------------------
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| -- Exports
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| --------------------------------------------------------------------------------
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| local p = {}
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| function p._exportClasses()
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| -- Used for testing purposes.
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| return {
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| CategoryHandler = CategoryHandler
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| }
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| end
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| function p._main(args, data)
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| data = data or mw.loadData('Module:Category handler/data')
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| local handler = CategoryHandler.new(data, args)
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| if handler:isSuppressed() then
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| return nil
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| end
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| return handler:getCategories()
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| end
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| function p.main(frame, data)
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| data = data or mw.loadData('Module:Category handler/data')
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| local args = require('Module:Arguments').getArgs(frame, {
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| wrappers = data.wrappers,
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| valueFunc = function (k, v)
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| v = trimWhitespace(v)
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| if type(k) == 'number' then
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| if v ~= '' then
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| return v
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| else
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| return nil
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| end
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| else
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| return v
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| end
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| end
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| })
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| return p._main(args, data)
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| end
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| return p
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