linkify/lib/auto_linker.ex
2019-06-21 18:09:52 +07:00

61 lines
2.9 KiB
Elixir

defmodule AutoLinker do
@moduledoc """
Create url links from text containing urls.
Turns an input string like `"Check out google.com"` into
`Check out "<a href=\"http://google.com\" target=\"_blank\" rel=\"noopener noreferrer\">google.com</a>"`
## Examples
iex> AutoLinker.link("google.com")
~s(<a href="http://google.com" class="auto-linker" target="_blank" rel="noopener noreferrer">google.com</a>)
iex> AutoLinker.link("google.com", new_window: false, rel: false)
~s(<a href="http://google.com" class="auto-linker">google.com</a>)
iex> AutoLinker.link("google.com", new_window: false, rel: false, class: false)
~s(<a href="http://google.com">google.com</a>)
"""
import AutoLinker.Parser
@doc """
Auto link a string.
Options:
* `class: "auto-linker"` - specify the class to be added to the generated link. false to clear
* `rel: "noopener noreferrer"` - override the rel attribute. false to clear
* `new_window: true` - set to false to remove `target='_blank'` attribute
* `truncate: false` - Set to a number to truncate urls longer then the number. Truncated urls will end in `..`
* `strip_prefix: true` - Strip the scheme prefix
* `exclude_class: false` - Set to a class name when you don't want urls auto linked in the html of the give class
* `exclude_id: false` - Set to an element id when you don't want urls auto linked in the html of the give element
* `exclude_patterns: ["```"]` - Don't link anything between the the pattern
* `email: false` - link email links
* `mention: false` - link @mentions (when `true`, requires `mention_prefix` or `mention_handler` options to be set)
* `mention_prefix: nil` - a prefix to build a link for a mention (example: `https://example.com/user/`)
* `mention_handler: nil` - a custom handler to validate and formart a mention
* `hashtag: false` - link #hashtags (when `true`, requires `hashtag_prefix` or `hashtag_handler` options to be set)
* `hashtag_prefix: nil` - a prefix to build a link for a hashtag (example: `https://example.com/tag/`)
* `hashtag_handler: nil` - a custom handler to validate and formart a hashtag
* `extra: false` - link urls with rarely used schemes (magnet, ipfs, irc, etc.)
* `validate_tld: true` - Set to false to disable TLD validation for urls/emails, also can be set to :no_scheme to validate TLDs only for urls without a scheme (e.g `example.com` will be validated, but `http://example.loki` won't)
Each of the above options can be specified when calling `link(text, opts)`
or can be set in the `:auto_linker`'s configuration. For example:
config :auto_linker,
class: false,
new_window: false
Note that passing opts to `link/2` will override the configuration settings.
"""
def link(text, opts \\ []) do
parse(text, opts)
end
def link_map(text, acc, opts \\ []) do
parse({text, acc}, opts)
end
end