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176 lines
4.4 KiB
176 lines
4.4 KiB
defmodule AutoLinker.Builder do
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@moduledoc """
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Module for building the auto generated link.
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"""
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@doc """
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Create a link.
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"""
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def create_link(url, opts) do
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[]
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|> build_attrs(url, opts, :rel)
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|> build_attrs(url, opts, :target)
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|> build_attrs(url, opts, :class)
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|> build_attrs(url, opts, :scheme)
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|> format_url(url, opts)
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end
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def create_markdown_links(text, opts) do
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[]
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|> build_attrs(text, opts, :rel)
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|> build_attrs(text, opts, :target)
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|> build_attrs(text, opts, :class)
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|> format_markdown(text, opts)
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end
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defp build_attrs(attrs, _, opts, :rel) do
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if rel = Map.get(opts, :rel, "noopener noreferrer"), do: [{:rel, rel} | attrs], else: attrs
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end
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defp build_attrs(attrs, _, opts, :target) do
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if Map.get(opts, :new_window, true), do: [{:target, :_blank} | attrs], else: attrs
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end
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defp build_attrs(attrs, _, opts, :class) do
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if cls = Map.get(opts, :class, "auto-linker"), do: [{:class, cls} | attrs], else: attrs
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end
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defp build_attrs(attrs, url, _opts, :scheme) do
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if String.starts_with?(url, ["http://", "https://"]),
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do: [{:href, url} | attrs],
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else: [{:href, "http://" <> url} | attrs]
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end
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defp format_url(attrs, url, opts) do
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url =
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url
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|> strip_prefix(Map.get(opts, :strip_prefix, true))
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|> truncate(Map.get(opts, :truncate, false))
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attrs = format_attrs(attrs)
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"<a #{attrs}>" <> url <> "</a>"
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end
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defp format_attrs(attrs) do
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attrs
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|> Enum.map(fn {key, value} -> ~s(#{key}="#{value}") end)
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|> Enum.join(" ")
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end
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defp format_markdown(attrs, text, _opts) do
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attrs =
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case format_attrs(attrs) do
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"" -> ""
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attrs -> " " <> attrs
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end
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Regex.replace(~r/\[(.+?)\]\((.+?)\)/, text, "<a href='\\2'#{attrs}>\\1</a>")
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end
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defp truncate(url, false), do: url
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defp truncate(url, len) when len < 3, do: url
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defp truncate(url, len) do
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if String.length(url) > len, do: String.slice(url, 0, len - 2) <> "..", else: url
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end
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defp strip_prefix(url, true) do
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url
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|> String.replace(~r/^https?:\/\//, "")
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|> String.replace(~r/^www\./, "")
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end
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defp strip_prefix(url, _), do: url
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def create_phone_link([], buffer, _) do
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buffer
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end
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def create_phone_link([h | t], buffer, opts) do
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create_phone_link(t, format_phone_link(h, buffer, opts), opts)
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end
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def format_phone_link([h | _], buffer, opts) do
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val =
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h
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|> String.replace(~r/[\.\+\- x\(\)]+/, "")
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|> format_phone_link(h, opts)
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# val = ~s'<a href="#" class="phone-number" data-phone="#{number}">#{h}</a>'
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String.replace(buffer, h, val)
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end
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def format_phone_link(number, original, opts) do
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tag = opts[:tag] || "a"
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class = opts[:class] || "phone-number"
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data_phone = opts[:data_phone] || "data-phone"
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attrs = format_attributes(opts[:attributes] || [])
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href = opts[:href] || "#"
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~s'<#{tag} href="#{href}" class="#{class}" #{data_phone}="#{number}"#{attrs}>#{original}</#{
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tag
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}>'
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end
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def create_mention_link("@" <> name, _buffer, opts) do
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mention_prefix = opts[:mention_prefix]
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url = mention_prefix <> name
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[href: url]
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|> build_attrs(url, opts, :rel)
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|> build_attrs(url, opts, :target)
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|> build_attrs(url, opts, :class)
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|> format_mention(name, opts)
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end
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def create_hashtag_link("#" <> tag, _buffer, opts) do
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hashtag_prefix = opts[:hashtag_prefix]
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url = hashtag_prefix <> tag
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[href: url]
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|> build_attrs(url, opts, :rel)
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|> build_attrs(url, opts, :target)
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|> build_attrs(url, opts, :class)
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|> format_hashtag(tag, opts)
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end
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def create_email_link(email, opts) do
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[]
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|> build_attrs(email, opts, :class)
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|> format_email(email, opts)
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end
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def create_extra_link(uri, opts) do
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[]
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|> build_attrs(uri, opts, :class)
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|> format_extra(uri, opts)
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end
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def format_mention(attrs, name, _opts) do
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attrs = format_attrs(attrs)
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"<a #{attrs}>@" <> name <> "</a>"
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end
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def format_hashtag(attrs, tag, _opts) do
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attrs = format_attrs(attrs)
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"<a #{attrs}>#" <> tag <> "</a>"
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end
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def format_email(attrs, email, _opts) do
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attrs = format_attrs(attrs)
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~s(<a href="mailto:#{email}" #{attrs}>#{email}</a>)
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end
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def format_extra(attrs, uri, _opts) do
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attrs = format_attributes(attrs)
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~s(<a href="#{uri}"#{attrs}>#{uri}</a>)
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end
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defp format_attributes(attrs) do
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Enum.reduce(attrs, "", fn {name, value}, acc ->
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acc <> ~s' #{name}="#{value}"'
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end)
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end
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end
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