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diff --git a/lib/auto_linker/parser.ex b/lib/auto_linker/parser.ex
index ecd4352..1f68733 100644
--- a/lib/auto_linker/parser.ex
+++ b/lib/auto_linker/parser.ex
@@ -1,241 +1,242 @@
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")
"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]+@)?(?<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])$"
@default_opts ~w(url)a
@tlds "./priv/tlds.txt" |> File.read!() |> String.trim() |> String.split("\n")
def parse(text, opts \\ %{})
def parse(text, list) when is_list(list), do: parse(text, Enum.into(list, %{}))
def parse(text, 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(text, Map.merge(config, opts))
end
defp do_parse(text, %{phone: false} = opts), do: do_parse(text, Map.delete(opts, :phone))
defp do_parse(text, %{url: false} = opts), do: do_parse(text, Map.delete(opts, :url))
defp do_parse(text, %{phone: _} = opts) do
text
|> do_parse(false, opts, {"", "", :parsing}, &check_and_link_phone/3)
|> do_parse(Map.delete(opts, :phone))
end
defp do_parse(text, %{markdown: true} = opts) do
text
|> Builder.create_markdown_links(opts)
|> do_parse(Map.delete(opts, :markdown))
end
defp do_parse(text, %{url: _} = opts) do
if (exclude = Map.get(opts, :exclude_pattern, false)) && String.starts_with?(text, exclude) do
text
else
do_parse(text, Map.get(opts, :scheme, false), opts, {"", "", :parsing}, &check_and_link/3)
end
|> do_parse(Map.delete(opts, :url))
end
defp do_parse(text, _), do: text
defp do_parse("", _scheme, _opts, {"", acc, _}, _handler),
do: acc
defp do_parse("", scheme, opts, {buffer, acc, _}, handler),
do: acc <> handler.(buffer, scheme, opts)
defp do_parse("<a" <> text, scheme, opts, {buffer, acc, :parsing}, handler),
do: do_parse(text, scheme, opts, {"", acc <> buffer <> "<a", :skip}, handler)
defp do_parse("</a>" <> text, scheme, opts, {buffer, acc, :skip}, handler),
do: do_parse(text, scheme, opts, {"", acc <> buffer <> "</a>", :parsing}, handler)
defp do_parse("<" <> text, scheme, opts, {"", acc, :parsing}, handler),
do: do_parse(text, scheme, opts, {"<", acc, {:open, 1}}, handler)
defp do_parse(">" <> text, scheme, opts, {buffer, acc, {:attrs, level}}, handler),
do: do_parse(text, scheme, opts, {"", acc <> buffer <> ">", {:html, level}}, handler)
defp do_parse(<<ch::8>> <> text, scheme, opts, {"", acc, {:attrs, level}}, handler),
do: do_parse(text, scheme, opts, {"", acc <> <<ch::8>>, {:attrs, level}}, handler)
defp do_parse("</" <> text, scheme, opts, {buffer, acc, {:html, level}}, handler),
do:
do_parse(
text,
scheme,
opts,
{"", acc <> handler.(buffer, scheme, opts) <> "</", {:close, level}},
handler
)
defp do_parse(">" <> text, scheme, opts, {buffer, acc, {:close, 1}}, handler),
do: do_parse(text, scheme, opts, {"", acc <> buffer <> ">", :parsing}, handler)
defp do_parse(">" <> text, scheme, opts, {buffer, acc, {:close, level}}, handler),
do: do_parse(text, scheme, opts, {"", acc <> buffer <> ">", {:html, level - 1}}, handler)
defp do_parse(" " <> text, scheme, opts, {buffer, acc, {:open, level}}, handler),
do: do_parse(text, scheme, opts, {"", acc <> buffer <> " ", {:attrs, level}}, handler)
defp do_parse("\n" <> text, scheme, opts, {buffer, acc, {:open, level}}, handler),
do: do_parse(text, scheme, opts, {"", acc <> buffer <> "\n", {:attrs, level}}, handler)
# default cases where state is not important
defp do_parse(" " <> text, scheme, %{phone: _} = opts, {buffer, acc, state}, handler),
do: do_parse(text, scheme, opts, {buffer <> " ", acc, state}, handler)
defp do_parse(" " <> text, scheme, opts, {buffer, acc, state}, handler),
do:
do_parse(
text,
scheme,
opts,
{"", acc <> handler.(buffer, scheme, opts) <> " ", state},
handler
)
defp do_parse("\n" <> text, scheme, opts, {buffer, acc, state}, handler),
do:
do_parse(
text,
scheme,
opts,
{"", acc <> handler.(buffer, scheme, opts) <> "\n", state},
handler
)
defp do_parse(<<ch::8>>, scheme, opts, {buffer, acc, state}, handler),
do:
do_parse(
"",
scheme,
opts,
{"", acc <> handler.(buffer <> <<ch::8>>, scheme, opts), state},
handler
)
defp do_parse(<<ch::8>> <> text, scheme, opts, {buffer, acc, state}, handler),
do: do_parse(text, scheme, opts, {buffer <> <<ch::8>>, acc, state}, handler)
def check_and_link(buffer, scheme, opts) do
buffer
|> is_url?(scheme)
|> link_url(buffer, opts)
end
def check_and_link_phone(buffer, _, opts) do
buffer
|> match_phone
|> link_phone(buffer, opts)
end
@doc false
def is_url?(buffer, true) do
if Regex.match?(@invalid_url, buffer) do
false
else
Regex.match?(@match_scheme, buffer) |> is_valid_tld?(buffer)
end
end
def is_url?(buffer, _) do
if Regex.match?(@invalid_url, buffer) do
false
else
Regex.match?(@match_url, 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()
- tld in @tlds
+
+ 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 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
end

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