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	diff --git a/lib/auto_linker/builder.ex b/lib/auto_linker/builder.ex
	index 185357f..be0ed26 100644
	--- a/lib/auto_linker/builder.ex
	+++ b/lib/auto_linker/builder.ex
	@@ -1,178 +1,177 @@
	defmodule AutoLinker.Builder do
	@moduledoc """
	Module for building the auto generated link.
	"""

	@doc """
	Create a link.
	"""
	def create_link(url, opts) do
	[]
	\|> build_attrs(url, opts, :rel)
	\|> build_attrs(url, opts, :target)
	\|> build_attrs(url, opts, :class)
	\|> build_attrs(url, opts, :scheme)
	\|> format_url(url, opts)
	end

	def create_markdown_links(text, opts) do
	[]
	\|> build_attrs(text, opts, :rel)
	\|> build_attrs(text, opts, :target)
	\|> build_attrs(text, opts, :class)
	\|> format_markdown(text, opts)
	end

	defp build_attrs(attrs, _, opts, :rel) do
	if rel = Map.get(opts, :rel, "noopener noreferrer"), do: [{:rel, rel} \| attrs], else: attrs
	end

	defp build_attrs(attrs, _, opts, :target) do
	if Map.get(opts, :new_window, true), do: [{:target, :_blank} \| attrs], else: attrs
	end

	defp build_attrs(attrs, _, opts, :class) do
	if cls = Map.get(opts, :class, "auto-linker"), do: [{:class, cls} \| attrs], else: attrs
	end

	defp build_attrs(attrs, url, _opts, :scheme) do
	if String.starts_with?(url, ["http://", "https://"]),
	do: [{:href, url} \| attrs],
	else: [{:href, "http://" <> url} \| attrs]
	end

	defp format_url(attrs, url, opts) do
	url =
	url
	\|> strip_prefix(Map.get(opts, :strip_prefix, true))
	\|> truncate(Map.get(opts, :truncate, false))

	attrs = format_attrs(attrs)
	"<a #{attrs}>" <> url <> "</a>"
	end

	defp format_attrs(attrs) do
	attrs
	\|> Enum.map(fn {key, value} -> ~s(#{key}="#{value}") end)
	\|> Enum.join(" ")
	end

	defp format_markdown(attrs, text, _opts) do
	attrs =
	case format_attrs(attrs) do
	"" -> ""
	attrs -> " " <> attrs
	end

	Regex.replace(~r/\[(.+?)\]$(.+?)$/, text, "<a href='\\2'#{attrs}>\\1</a>")
	end

	defp truncate(url, false), do: url
	defp truncate(url, len) when len < 3, do: url

	defp truncate(url, len) do
	if String.length(url) > len, do: String.slice(url, 0, len - 2) <> "..", else: url
	end

	defp strip_prefix(url, true) do
	url
	\|> String.replace(~r/^https?:\/\//, "")
	\|> String.replace(~r/^www\./, "")
	end

	defp strip_prefix(url, _), do: url

	def create_phone_link([], buffer, _) do
	buffer
	end

	def create_phone_link([h \| t], buffer, opts) do
	create_phone_link(t, format_phone_link(h, buffer, opts), opts)
	end

	def format_phone_link([h \| _], buffer, opts) do
	val =
	h
	\|> String.replace(~r/[\.\+\- x]+/, "")
	\|> format_phone_link(h, opts)

	# val = ~s'<a href="#" class="phone-number" data-phone="#{number}">#{h}</a>'
	String.replace(buffer, h, val)
	end

	def format_phone_link(number, original, opts) do
	tag = opts[:tag] \|\| "a"
	class = opts[:class] \|\| "phone-number"
	data_phone = opts[:data_phone] \|\| "data-phone"
	attrs = format_attributes(opts[:attributes] \|\| [])
	href = opts[:href] \|\| "#"

	~s'<#{tag} href="#{href}" class="#{class}" #{data_phone}="#{number}"#{attrs}>#{original}</#{
	tag
	}>'
	end

	def create_mention_link("@" <> name, _buffer, opts) do
	mention_prefix = opts[:mention_prefix]

	url = mention_prefix <> name

	[]
	\|> build_attrs(url, opts, :rel)
	\|> build_attrs(url, opts, :target)
	\|> build_attrs(url, opts, :class)
	\|> build_attrs(url, opts, :scheme)
	\|> format_mention(name, opts)
	end

	- def create_hashtag_link(tag, _buffer, opts) do
	+ def create_hashtag_link("#" <> tag, _buffer, opts) do
	hashtag_prefix = opts[:hashtag_prefix]

	url = hashtag_prefix <> tag

	- []
	+ [href: url]
	\|> build_attrs(url, opts, :rel)
	\|> build_attrs(url, opts, :target)
	\|> build_attrs(url, opts, :class)
	- \|> build_attrs(url, opts, :scheme)
	\|> format_hashtag(tag, opts)
	end

	def create_email_link(email, opts) do
	[]
	\|> build_attrs(email, opts, :class)
	\|> format_email(email, opts)
	end

	def create_extra_link(uri, opts) do
	[]
	\|> build_attrs(uri, opts, :class)
	\|> format_extra(uri, opts)
	end

	def format_mention(attrs, name, _opts) do
	attrs = format_attrs(attrs)
	"<a #{attrs}>@" <> name <> "</a>"
	end

	def format_hashtag(attrs, tag, _opts) do
	attrs = format_attrs(attrs)
	"<a #{attrs}>#" <> tag <> "</a>"
	end

	def format_email(attrs, email, _opts) do
	attrs = format_attrs(attrs)
	~s(<a href="mailto:#{email}" #{attrs}>#{email}</a>)
	end

	def format_extra(attrs, uri, _opts) do
	attrs = format_attributes(attrs)
	~s(<a href="#{uri}"#{attrs}>#{uri}</a>)
	end

	defp format_attributes(attrs) do
	Enum.reduce(attrs, "", fn {name, value}, acc ->
	acc <> ~s' #{name}="#{value}"'
	end)
	end
	end
	diff --git a/lib/auto_linker/parser.ex b/lib/auto_linker/parser.ex
	index b00fc67..7374df0 100644
	--- a/lib/auto_linker/parser.ex
	+++ b/lib/auto_linker/parser.ex
	@@ -1,430 +1,430 @@
	defmodule AutoLinker.Parser do
	@moduledoc """
	Module to handle parsing the the input string.
	"""

	alias AutoLinker.Builder

	@doc """
	Parse the given string, identifying items to link.

	Parses the string, replacing the matching urls and phone numbers with an html link.

	## Examples

	iex> AutoLinker.Parser.parse("Check out google.com")
	~s{Check out <a href="http://google.com" class="auto-linker" target="_blank" rel="noopener noreferrer">google.com</a>}

	iex> AutoLinker.Parser.parse("call me at x9999", phone: true)
	~s{call me at <a href="#" class="phone-number" data-phone="9999">x9999</a>}

	iex> AutoLinker.Parser.parse("or at home on 555.555.5555", phone: true)
	~s{or at home on <a href="#" class="phone-number" data-phone="5555555555">555.555.5555</a>}

	iex> AutoLinker.Parser.parse(", work (555) 555-5555", phone: true)
	~s{, work <a href="#" class="phone-number" data-phone="5555555555">(555) 555-5555</a>}
	"""

	# @invalid_url ~r/\.\.+/
	@invalid_url ~r/(\.\.+)\|(^(\d+\.){1,2}\d+$)/

	@match_url ~r{^[\w\.-]+(?:\.[\w\.-]+)+[\w\-\._~%:/?#[\]@!\$&'\*\+,;=.]+$}

	@match_scheme ~r{^(?:http(s)?:\/\/)?[\w.-]+(?:\.[\w\.-]+)+[\w\-\._~%:/?#[\]@!\$&'\*\+,;=.]+$}

	@match_phone ~r"((?:x\d{2,7})\|(?:(?:\+?1\s?(?:[.-]\s?)?)?(?:$\s?(?:[2-9]1[02-9]\|[2-9][02-8]1\|[2-9][02-8][02-9])\s?$\|(?:[2-9]1[02-9]\|[2-9][02-8]1\|[2-9][02-8][02-9]))\s?(?:[.-]\s?)?)(?:[2-9]1[02-9]\|[2-9][02-9]1\|[2-9][02-9]{2})\s?(?:[.-]\s?)?(?:[0-9]{4}))"

	@match_hostname ~r{^(?:https?:\/\/)?(?:[^@\n]+\\w@)?(?<host>[^:#~\/\n?]+)}

	@match_ip ~r"^(([0-9]\|[1-9][0-9]\|1[0-9]{2}\|2[0-4][0-9]\|25[0-5])\.){3}([0-9]\|[1-9][0-9]\|1[0-9]{2}\|2[0-4][0-9]\|25[0-5])$"

	# @user
	# @user@example.com
	@match_mention ~r/^@[a-zA-Z0-9.!#$%&'+\/=?^_`{\|}~-]+@?[a-zA-Z0-9_-](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)/u

	# https://www.w3.org/TR/html5/forms.html#valid-e-mail-address
	@match_email ~r/^[a-zA-Z0-9.!#$%&'+\/=?^_`{\|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)$/u

	- @match_hashtag ~r/^\#(?<tag>\w+)/u
	+ @match_hashtag ~r/^(?<tag>\#\w+)/u

	@prefix_extra [
	"magnet:?",
	"dweb://",
	"dat://",
	"gopher://",
	"ipfs://",
	"ipns://",
	"irc://",
	"ircs://",
	"irc6://",
	"mumble://",
	"ssb://"
	]

	@tlds "./priv/tlds.txt" \|> File.read!() \|> String.split("\n", trim: true)

	@default_opts ~w(url)a

	def parse(input, opts \\ %{})
	def parse(input, opts) when is_binary(input), do: {input, nil} \|> parse(opts) \|> elem(0)
	def parse(input, list) when is_list(list), do: parse(input, Enum.into(list, %{}))

	def parse(input, opts) do
	config =
	:auto_linker
	\|> Application.get_env(:opts, [])
	\|> Enum.into(%{})
	\|> Map.put(
	:attributes,
	Application.get_env(:auto_linker, :attributes, [])
	)

	opts =
	Enum.reduce(@default_opts, opts, fn opt, acc ->
	if is_nil(opts[opt]) and is_nil(config[opt]) do
	Map.put(acc, opt, true)
	else
	acc
	end
	end)

	do_parse(input, Map.merge(config, opts))
	end

	defp do_parse(input, %{phone: false} = opts), do: do_parse(input, Map.delete(opts, :phone))
	defp do_parse(input, %{url: false} = opts), do: do_parse(input, Map.delete(opts, :url))

	defp do_parse(input, %{phone: _} = opts) do
	input
	\|> do_parse(opts, {"", "", :parsing}, &check_and_link_phone/3)
	\|> do_parse(Map.delete(opts, :phone))
	end

	defp do_parse(input, %{mention: true} = opts) do
	input
	\|> do_parse(opts, {"", "", :parsing}, &check_and_link_mention/3)
	\|> do_parse(Map.delete(opts, :mention))
	end

	defp do_parse(input, %{extra: true} = opts) do
	input
	\|> do_parse(opts, {"", "", :parsing}, &check_and_link_extra/3)
	\|> do_parse(Map.delete(opts, :extra))
	end

	defp do_parse({text, user_acc}, %{markdown: true} = opts) do
	text
	\|> Builder.create_markdown_links(opts)
	\|> (&{&1, user_acc}).()
	\|> do_parse(Map.delete(opts, :markdown))
	end

	defp do_parse(input, %{email: true} = opts) do
	input
	\|> do_parse(opts, {"", "", :parsing}, &check_and_link_email/3)
	\|> do_parse(Map.delete(opts, :email))
	end

	defp do_parse({text, user_acc}, %{url: _} = opts) do
	input =
	with exclude <- Map.get(opts, :exclude_patterns),
	true <- is_list(exclude),
	true <- String.starts_with?(text, exclude) do
	{text, user_acc}
	else
	_ ->
	do_parse(
	{text, user_acc},
	opts,
	{"", "", :parsing},
	&check_and_link/3
	)
	end

	do_parse(input, Map.delete(opts, :url))
	end

	defp do_parse(input, %{hashtag: true} = opts) do
	input
	\|> do_parse(opts, {"", "", :parsing}, &check_and_link_hashtag/3)
	\|> do_parse(Map.delete(opts, :hashtag))
	end

	defp do_parse(input, _), do: input

	defp do_parse({"", user_acc}, _opts, {"", acc, _}, _handler),
	do: {acc, user_acc}

	defp do_parse({"", user_acc}, opts, {buffer, acc, _}, handler) do
	{buffer, user_acc} = run_handler(handler, buffer, opts, user_acc)
	{acc <> buffer, user_acc}
	end

	defp do_parse({"<a" <> text, user_acc}, opts, {buffer, acc, :parsing}, handler),
	do: do_parse({text, user_acc}, opts, {"", acc <> buffer <> "<a", :skip}, handler)

	defp do_parse({"</a>" <> text, user_acc}, opts, {buffer, acc, :skip}, handler),
	do: do_parse({text, user_acc}, opts, {"", acc <> buffer <> "</a>", :parsing}, handler)

	defp do_parse({"<" <> text, user_acc}, opts, {"", acc, :parsing}, handler),
	do: do_parse({text, user_acc}, opts, {"<", acc, {:open, 1}}, handler)

	defp do_parse({">" <> text, user_acc}, opts, {buffer, acc, {:attrs, level}}, handler),
	do:
	do_parse(
	{text, user_acc},
	opts,
	{"", acc <> buffer <> ">", {:html, level}},
	handler
	)

	defp do_parse({<<ch::8>> <> text, user_acc}, opts, {"", acc, {:attrs, level}}, handler) do
	do_parse({text, user_acc}, opts, {"", acc <> <<ch::8>>, {:attrs, level}}, handler)
	end

	defp do_parse({"</" <> text, user_acc}, opts, {buffer, acc, {:html, level}}, handler) do
	{buffer, user_acc} = run_handler(handler, buffer, opts, user_acc)

	do_parse(
	{text, user_acc},
	opts,
	{"", acc <> buffer <> "</", {:close, level}},
	handler
	)
	end

	defp do_parse({">" <> text, user_acc}, opts, {buffer, acc, {:close, 1}}, handler),
	do: do_parse({text, user_acc}, opts, {"", acc <> buffer <> ">", :parsing}, handler)

	defp do_parse({">" <> text, user_acc}, opts, {buffer, acc, {:close, level}}, handler),
	do:
	do_parse(
	{text, user_acc},
	opts,
	{"", acc <> buffer <> ">", {:html, level - 1}},
	handler
	)

	defp do_parse({" " <> text, user_acc}, opts, {buffer, acc, {:open, level}}, handler),
	do:
	do_parse(
	{text, user_acc},
	opts,
	{"", acc <> buffer <> " ", {:attrs, level}},
	handler
	)

	defp do_parse({"\n" <> text, user_acc}, opts, {buffer, acc, {:open, level}}, handler),
	do:
	do_parse(
	{text, user_acc},
	opts,
	{"", acc <> buffer <> "\n", {:attrs, level}},
	handler
	)

	# default cases where state is not important
	defp do_parse(
	{" " <> text, user_acc},
	%{phone: _} = opts,
	{buffer, acc, state},
	handler
	),
	do: do_parse({text, user_acc}, opts, {buffer <> " ", acc, state}, handler)

	defp do_parse({" " <> text, user_acc}, opts, {buffer, acc, state}, handler) do
	{buffer, user_acc} = run_handler(handler, buffer, opts, user_acc)

	do_parse(
	{text, user_acc},
	opts,
	{"", acc <> buffer <> " ", state},
	handler
	)
	end

	defp do_parse({"\n" <> text, user_acc}, opts, {buffer, acc, state}, handler) do
	{buffer, user_acc} = run_handler(handler, buffer, opts, user_acc)

	do_parse(
	{text, user_acc},
	opts,
	{"", acc <> buffer <> "\n", state},
	handler
	)
	end

	defp do_parse({<<ch::8>>, user_acc}, opts, {buffer, acc, state}, handler) do
	{buffer, user_acc} = run_handler(handler, buffer <> <<ch::8>>, opts, user_acc)

	do_parse(
	{"", user_acc},
	opts,
	{"", acc <> buffer, state},
	handler
	)
	end

	defp do_parse({<<ch::8>> <> text, user_acc}, opts, {buffer, acc, state}, handler),
	do: do_parse({text, user_acc}, opts, {buffer <> <<ch::8>>, acc, state}, handler)

	def check_and_link(buffer, opts, _user_acc) do
	buffer
	\|> is_url?(opts[:scheme])
	\|> link_url(buffer, opts)
	end

	def check_and_link_email(buffer, opts, _user_acc) do
	buffer
	\|> is_email?
	\|> link_email(buffer, opts)
	end

	def check_and_link_phone(buffer, opts, _user_acc) do
	buffer
	\|> match_phone
	\|> link_phone(buffer, opts)
	end

	def check_and_link_mention(buffer, opts, user_acc) do
	buffer
	\|> match_mention
	\|> link_mention(buffer, opts, user_acc)
	end

	def check_and_link_hashtag(buffer, opts, user_acc) do
	buffer
	\|> match_hashtag
	\|> link_hashtag(buffer, opts, user_acc)
	end

	def check_and_link_extra("xmpp:" <> handle, opts, _user_acc) do
	handle
	\|> is_email?
	\|> link_extra("xmpp:" <> handle, opts)
	end

	def check_and_link_extra(buffer, opts, _user_acc) do
	buffer
	\|> String.starts_with?(@prefix_extra)
	\|> link_extra(buffer, opts)
	end

	# @doc false
	def is_url?(buffer, true) do
	if Regex.match?(@invalid_url, buffer) do
	false
	else
	@match_scheme \|> Regex.match?(buffer) \|> is_valid_tld?(buffer)
	end
	end

	def is_url?(buffer, _) do
	if Regex.match?(@invalid_url, buffer) do
	false
	else
	@match_url \|> Regex.match?(buffer) \|> is_valid_tld?(buffer)
	end
	end

	def is_email?(buffer) do
	if Regex.match?(@invalid_url, buffer) do
	false
	else
	@match_email \|> Regex.match?(buffer) \|> is_valid_tld?(buffer)
	end
	end

	def is_valid_tld?(true, buffer) do
	[host] = Regex.run(@match_hostname, buffer, capture: [:host])

	if is_ip?(host) do
	true
	else
	tld = host \|> String.split(".") \|> List.last()

	Enum.member?(@tlds, tld)
	end
	end

	def is_valid_tld?(false, _), do: false

	def is_ip?(buffer) do
	Regex.match?(@match_ip, buffer)
	end

	@doc false
	def match_phone(buffer) do
	case Regex.scan(@match_phone, buffer) do
	[] -> nil
	other -> other
	end
	end

	def match_mention(buffer) do
	case Regex.run(@match_mention, buffer) do
	[mention] -> mention
	_ -> nil
	end
	end

	def match_hashtag(buffer) do
	case Regex.run(@match_hashtag, buffer, capture: [:tag]) do
	[hashtag] -> hashtag
	_ -> nil
	end
	end

	def link_hashtag(nil, buffer, _, _user_acc), do: buffer

	def link_hashtag(hashtag, buffer, %{hashtag_handler: hashtag_handler} = opts, user_acc) do
	hashtag_handler.(hashtag, buffer, opts, user_acc)
	end

	def link_hashtag(hashtag, buffer, opts, _user_acc) do
	Builder.create_hashtag_link(hashtag, buffer, opts)
	end

	def link_mention(nil, buffer, _, user_acc), do: {buffer, user_acc}

	def link_mention(mention, buffer, %{mention_handler: mention_handler} = opts, user_acc) do
	mention_handler.(mention, buffer, opts, user_acc)
	end

	def link_mention(mention, buffer, opts, _user_acc) do
	Builder.create_mention_link(mention, buffer, opts)
	end

	def link_phone(nil, buffer, _), do: buffer

	def link_phone(list, buffer, opts) do
	Builder.create_phone_link(list, buffer, opts)
	end

	@doc false
	def link_url(true, buffer, opts) do
	Builder.create_link(buffer, opts)
	end

	def link_url(_, buffer, _opts), do: buffer

	@doc false
	def link_email(true, buffer, opts) do
	Builder.create_email_link(buffer, opts)
	end

	def link_email(_, buffer, _opts), do: buffer

	def link_extra(true, buffer, opts) do
	Builder.create_extra_link(buffer, opts)
	end

	def link_extra(_, buffer, _opts), do: buffer

	defp run_handler(handler, buffer, opts, user_acc) do
	case handler.(buffer, opts, user_acc) do
	{buffer, user_acc} -> {buffer, user_acc}
	buffer -> {buffer, user_acc}
	end
	end
	end
	diff --git a/test/auto_linker_test.exs b/test/auto_linker_test.exs
	index c906206..fc6f64d 100644
	--- a/test/auto_linker_test.exs
	+++ b/test/auto_linker_test.exs
	@@ -1,345 +1,345 @@
	defmodule AutoLinkerTest do
	use ExUnit.Case, async: true
	doctest AutoLinker

	test "phone number" do
	assert AutoLinker.link(", work (555) 555-5555", phone: true) ==
	~s{, work <a href="#" class="phone-number" data-phone="5555555555">(555) 555-5555</a>}
	end

	test "default link" do
	assert AutoLinker.link("google.com") ==
	"<a href=\"http://google.com\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">google.com</a>"
	end

	test "markdown" do
	assert AutoLinker.link("[google.com](http://google.com)", markdown: true) ==
	"<a href='http://google.com' class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">google.com</a>"
	end

	test "does on link existing links" do
	assert AutoLinker.link("<a href='http://google.com'>google.com</a>") ==
	"<a href='http://google.com'>google.com</a>"
	end

	test "phone number and markdown link" do
	assert AutoLinker.link("888 888-8888 [ab](a.com)", phone: true, markdown: true) ==
	"<a href=\"#\" class=\"phone-number\" data-phone=\"8888888888\">888 888-8888</a>" <>
	" <a href='a.com' class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">ab</a>"
	end

	test "all kinds of links" do
	text =
	"hello @user google.com https://ddg.com 888 888-8888 #tag user@email.com [google.com](http://google.com) irc:///mIRC"

	expected =
	"hello <a href=\"https://example.com/user/user\">@user</a> <a href=\"http://google.com\">google.com</a> <a href=\"https://ddg.com\">ddg.com</a> <a href=\"#\" class=\"phone-number\" data-phone=\"8888888888\">888 888-8888</a> <a href=\"https://example.com/tag/tag\">#tag</a> <a href=\"mailto:user@email.com\" >user@email.com</a> <a href='http://google.com'>google.com</a> <a href=\"irc:///mIRC\">irc:///mIRC</a>"

	assert AutoLinker.link(text,
	phone: true,
	markdown: true,
	email: true,
	mention: true,
	mention_prefix: "https://example.com/user/",
	hashtag: true,
	hashtag_prefix: "https://example.com/tag/",
	scheme: true,
	extra: true,
	class: false,
	new_window: false,
	rel: false
	) == expected
	end

	describe "custom handlers" do
	test "mentions handler" do
	text = "hello @user, @valid_user and @invalid_user"
	valid_users = ["user", "valid_user"]

	handler = fn "@" <> user = mention, buffer, _opts, acc ->
	if Enum.member?(valid_users, user) do
	link = ~s(<a href="https://example.com/user/#{user}" data-user="#{user}">#{mention}</a>)
	{link, %{acc \| mentions: MapSet.put(acc.mentions, {mention, user})}}
	else
	{buffer, acc}
	end
	end

	{result_text, %{mentions: mentions}} =
	AutoLinker.link_map(text, %{mentions: MapSet.new()},
	mention: true,
	mention_handler: handler
	)

	assert result_text ==
	"hello <a href=\"https://example.com/user/user\" data-user=\"user\">@user</a>, <a href=\"https://example.com/user/valid_user\" data-user=\"valid_user\">@valid_user</a> and @invalid_user"

	assert mentions \|> MapSet.to_list() \|> Enum.map(&elem(&1, 1)) == valid_users
	end

	test "hashtags handler" do
	text = "#hello #world"

	handler = fn hashtag, buffer, opts, acc ->
	link = AutoLinker.Builder.create_hashtag_link(hashtag, buffer, opts)
	{link, %{acc \| tags: MapSet.put(acc.tags, hashtag)}}
	end

	{result_text, %{tags: tags}} =
	AutoLinker.link_map(text, %{tags: MapSet.new()},
	hashtag: true,
	hashtag_handler: handler,
	hashtag_prefix: "https://example.com/user/",
	class: false,
	new_window: false,
	rel: false
	)

	assert result_text ==
	"<a href=\"https://example.com/user/hello\">#hello</a> <a href=\"https://example.com/user/world\">#world</a>"

	- assert MapSet.to_list(tags) == ["hello", "world"]
	+ assert MapSet.to_list(tags) == ["#hello", "#world"]
	end
	end

	describe "mentions" do
	test "simple mentions" do
	expected =
	~s{hello <a class="auto-linker" target="_blank" rel="noopener noreferrer" href="https://example.com/user/user">@user</a> and <a class="auto-linker" target="_blank" rel="noopener noreferrer" href="https://example.com/user/anotherUser">@anotherUser</a>.}

	assert AutoLinker.link("hello @user and @anotherUser.",
	mention: true,
	mention_prefix: "https://example.com/user/"
	) == expected
	end

	test "metion @user@example.com" do
	text = "hey @user@example.com"

	expected =
	"hey <a class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https://example.com/user/user@example.com\">@user@example.com</a>"

	assert AutoLinker.link(text,
	mention: true,
	mention_prefix: "https://example.com/user/"
	) == expected
	end

	test "skip if starts with @@" do
	text = "hello @@user and @anotherUser"

	expected =
	"hello @@user and <a href='https://example.com/user/anotherUser' class='auto-linker' target='_blank' rel='noopener noreferrer'>@anotherUser</a>"

	assert AutoLinker.link(text,
	mention: true,
	mention_prefix: "https://example.com/user/"
	) == expected
	end
	end

	describe "hashtag links" do
	test "hashtag" do
	expected =
	" one <a class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https://example.com/tag/2two\">#2two</a> three <a class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https://example.com/tag/four\">#four</a>."

	assert AutoLinker.link(" one #2two three #four.",
	hashtag: true,
	hashtag_prefix: "https://example.com/tag/"
	) == expected
	end

	test "do not turn urls with hashes into hashtags" do
	text = "google.com#test #test google.com/#test #tag"

	expected =
	"<a href=\"http://google.com#test\">google.com#test</a> <a href=\"https://example.com/tag/test\">#test</a> <a href=\"http://google.com/#test\">google.com/#test</a> <a href=\"https://example.com/tag/tag\">#tag</a>"

	assert AutoLinker.link(text,
	scheme: true,
	hashtag: true,
	class: false,
	new_window: false,
	rel: false,
	hashtag_prefix: "https://example.com/tag/"
	) == expected
	end

	test "works with non-latin characters" do
	text = "#漢字 #は #тест #ทดสอบ"

	expected =
	"<a href=\"https://example.com/tag/漢字\">#漢字</a> <a href=\"https://example.com/tag/は\">#は</a> <a href=\"https://example.com/tag/тест\">#тест</a> <a href=\"https://example.com/tag/ทดสอบ\">#ทดสอบ</a>"

	assert AutoLinker.link(text,
	scheme: true,
	class: false,
	new_window: false,
	rel: false,
	hashtag: true,
	hashtag_prefix: "https://example.com/tag/"
	) == expected
	end
	end

	describe "links" do
	test "turning urls into links" do
	text = "Hey, check out http://www.youtube.com/watch?v=8Zg1-TufF%20zY?x=1&y=2#blabla ."

	expected =
	"Hey, check out <a href=\"http://www.youtube.com/watch?v=8Zg1-TufF%20zY?x=1&y=2#blabla\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">youtube.com/watch?v=8Zg1-TufF%20zY?x=1&y=2#blabla</a> ."

	assert AutoLinker.link(text, scheme: true) == expected

	# no scheme
	text = "Hey, check out www.youtube.com/watch?v=8Zg1-TufF%20zY?x=1&y=2#blabla ."
	assert AutoLinker.link(text, scheme: true) == expected
	end

	test "hostname/@user" do
	text = "https://example.com/@user"

	expected =
	"<a href=\"https://example.com/@user\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">example.com/@user</a>"

	assert AutoLinker.link(text, scheme: true) == expected

	text = "https://example.com:4000/@user"

	expected =
	"<a href=\"https://example.com:4000/@user\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">example.com:4000/@user</a>"

	assert AutoLinker.link(text, scheme: true) == expected

	text = "https://example.com:4000/@user"

	expected =
	"<a href=\"https://example.com:4000/@user\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">example.com:4000/@user</a>"

	assert AutoLinker.link(text, scheme: true) == expected

	text = "@username"
	expected = "@username"
	assert AutoLinker.link(text, scheme: true) == expected

	text = "http://www.cs.vu.nl/~ast/intel/"

	expected =
	"<a href=\"http://www.cs.vu.nl/~ast/intel/\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">cs.vu.nl/~ast/intel/</a>"

	assert AutoLinker.link(text, scheme: true) == expected

	text = "https://forum.zdoom.org/viewtopic.php?f=44&t=57087"

	expected =
	"<a href=\"https://forum.zdoom.org/viewtopic.php?f=44&t=57087\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">forum.zdoom.org/viewtopic.php?f=44&t=57087</a>"

	assert AutoLinker.link(text, scheme: true) == expected

	text = "https://en.wikipedia.org/wiki/Sophia_(Gnosticism)#Mythos_of_the_soul"

	expected =
	"<a href=\"https://en.wikipedia.org/wiki/Sophia_(Gnosticism)#Mythos_of_the_soul\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">en.wikipedia.org/wiki/Sophia_(Gnosticism)#Mythos_of_the_soul</a>"

	assert AutoLinker.link(text, scheme: true) == expected

	text = "https://en.wikipedia.org/wiki/Duff's_device"

	expected =
	"<a href=\"https://en.wikipedia.org/wiki/Duff's_device\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">en.wikipedia.org/wiki/Duff's_device</a>"

	assert AutoLinker.link(text, scheme: true) == expected
	end
	end

	describe "non http links" do
	test "xmpp" do
	text = "xmpp:user@example.com"

	expected =
	"<a href=\"xmpp:user@example.com\" class=\"auto-linker\">xmpp:user@example.com</a>"

	assert AutoLinker.link(text, extra: true) == expected
	end

	test "email" do
	text = "user@example.com"
	expected = "<a href=\"mailto:user@example.com\" class=\"auto-linker\">user@example.com</a>"
	assert AutoLinker.link(text, email: true) == expected
	end

	test "magnet" do
	text =
	"magnet:?xt=urn:btih:a4104a9d2f5615601c429fe8bab8177c47c05c84&dn=ubuntu-18.04.1.0-live-server-amd64.iso&tr=http%3A%2F%2Ftorrent.ubuntu.com%3A6969%2Fannounce&tr=http%3A%2F%2Fipv6.torrent.ubuntu.com%3A6969%2Fannounce"

	expected =
	"<a href=\"magnet:?xt=urn:btih:a4104a9d2f5615601c429fe8bab8177c47c05c84&dn=ubuntu-18.04.1.0-live-server-amd64.iso&tr=http%3A%2F%2Ftorrent.ubuntu.com%3A6969%2Fannounce&tr=http%3A%2F%2Fipv6.torrent.ubuntu.com%3A6969%2Fannounce\" class=\"auto-linker\">magnet:?xt=urn:btih:a4104a9d2f5615601c429fe8bab8177c47c05c84&dn=ubuntu-18.04.1.0-live-server-amd64.iso&tr=http%3A%2F%2Ftorrent.ubuntu.com%3A6969%2Fannounce&tr=http%3A%2F%2Fipv6.torrent.ubuntu.com%3A6969%2Fannounce</a>"

	assert AutoLinker.link(text, extra: true) == expected
	end

	test "dweb" do
	text =
	"dweb://584faa05d394190ab1a3f0240607f9bf2b7e2bd9968830a11cf77db0cea36a21+v1.0.0/path/to/file.txt"

	expected =
	"<a href=\"dweb://584faa05d394190ab1a3f0240607f9bf2b7e2bd9968830a11cf77db0cea36a21+v1.0.0/path/to/file.txt\" class=\"auto-linker\">dweb://584faa05d394190ab1a3f0240607f9bf2b7e2bd9968830a11cf77db0cea36a21+v1.0.0/path/to/file.txt</a>"

	assert AutoLinker.link(text, extra: true) == expected
	end
	end

	describe "TLDs" do
	test "parse with scheme" do
	text = "https://google.com"

	expected =
	"<a href=\"https://google.com\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">google.com</a>"

	assert AutoLinker.link(text, scheme: true) == expected
	end

	test "only existing TLDs with scheme" do
	text = "this url https://google.foobar.blah11blah/ has invalid TLD"

	expected = "this url https://google.foobar.blah11blah/ has invalid TLD"
	assert AutoLinker.link(text, scheme: true) == expected

	text = "this url https://google.foobar.com/ has valid TLD"

	expected =
	"this url <a href=\"https://google.foobar.com/\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">google.foobar.com/</a> has valid TLD"

	assert AutoLinker.link(text, scheme: true) == expected
	end

	test "only existing TLDs without scheme" do
	text = "this url google.foobar.blah11blah/ has invalid TLD"
	expected = "this url google.foobar.blah11blah/ has invalid TLD"
	assert AutoLinker.link(text, scheme: false) == expected

	text = "this url google.foobar.com/ has valid TLD"

	expected =
	"this url <a href=\"http://google.foobar.com/\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">google.foobar.com/</a> has valid TLD"

	assert AutoLinker.link(text, scheme: false) == expected
	end

	test "only existing TLDs with and without scheme" do
	text = "this url http://google.foobar.com/ has valid TLD"

	expected =
	"this url <a href=\"http://google.foobar.com/\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">google.foobar.com/</a> has valid TLD"

	assert AutoLinker.link(text, scheme: true) == expected

	text = "this url google.foobar.com/ has valid TLD"

	expected =
	"this url <a href=\"http://google.foobar.com/\" class=\"auto-linker\" target=\"_blank\" rel=\"noopener noreferrer\">google.foobar.com/</a> has valid TLD"

	assert AutoLinker.link(text, scheme: true) == expected
	end
	end
	end

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