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defmodule ExDoc.GroupMatcher do
@moduledoc false
@type pattern :: Regex.t() | module() | String.t()
@type patterns :: pattern | [pattern]
@type group_patterns :: keyword(patterns)
@doc """
Finds the index of a given group.
"""
def group_index(groups, group) do
Enum.find_index(groups, fn {k, _v} -> k == group end) || -1
end
@doc """
Finds a matching group for the given function.
"""
@spec match_function(group_patterns, map) :: atom() | nil
def match_function(group_patterns, metadata) do
match_group_patterns(group_patterns, fn pattern -> pattern.(metadata) end)
end
@doc """
Finds a matching group for the given module name, id, and metadata.
"""
@spec match_module(group_patterns, module, binary, map) :: atom() | nil
def match_module(group_patterns, module, id, metadata) do
match_group_patterns(group_patterns, fn pattern ->
case pattern do
%Regex{} = regex -> Regex.match?(regex, id)
string when is_binary(string) -> id == string
atom when is_atom(atom) -> atom == module
function when is_function(function) -> function.(metadata)
end
end)
end
@doc """
Finds a matching group for the given extra filename
"""
@spec match_extra(group_patterns, binary) :: atom() | nil
def match_extra(group_patterns, filename) do
match_group_patterns(group_patterns, fn pattern ->
case pattern do
%Regex{} = regex -> Regex.match?(regex, filename)
string when is_binary(string) -> filename == string
end
end)
end
defp match_group_patterns(group_patterns, matcher) do
Enum.find_value(group_patterns, fn {group, patterns} ->
patterns = List.wrap(patterns)
Enum.any?(patterns, matcher) && group
end)
end
end
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