Merge branch 'dev-lanodan-url-regex' into 'develop'

lib/pleroma/formatter.ex: Fix URL regex

Closes #127

See merge request pleroma/pleroma!69

config/config.exs

@@ -16,6 +16,8 @@
 
 config :pleroma, :emoji, shortcode_globs: ["/emoji/custom/**/*.png"]
 
+config :pleroma, :uri_schemes, additionnal_schemes: []
+
 # Configures the endpoint
 config :pleroma, Pleroma.Web.Endpoint,
   url: [host: "localhost"],

lib/pleroma/formatter.ex

@@ -165,8 +165,29 @@ def get_custom_emoji() do
     @emoji
   end
 
-  @link_regex ~r/https?:\/\/[\w\.\/?=\-#\+%&@~'\(\):]+[\w\/]/u
+  @link_regex ~r/[0-9a-z+\-\.]+:[0-9a-z$-_.+!*'(),]+/ui
 
+  # IANA got a list https://www.iana.org/assignments/uri-schemes/ but
+  # Stuff like ipfs isn’t in it
+  # There is very niche stuff
+  @uri_schemes [
+    "https://",
+    "http://",
+    "dat://",
+    "dweb://",
+    "gopher://",
+    "ipfs://",
+    "ipns://",
+    "irc:",
+    "ircs:",
+    "magnet:",
+    "mailto:",
+    "mumble:",
+    "ssb://",
+    "xmpp:"
+  ]
+
+  # TODO: make it use something other than @link_regex
   def html_escape(text) do
     Regex.split(@link_regex, text, include_captures: true)
     |> Enum.map_every(2, fn chunk ->
@@ -176,11 +197,18 @@ def html_escape(text) do
     |> Enum.join("")
   end
 
-  @doc "changes http:... links to html links"
+  @doc "changes scheme:... urls to html links"
   def add_links({subs, text}) do
+    additionnal_schemes =
+      Application.get_env(:pleroma, :uri_schemes, [])
+      |> Keyword.get(:additionnal_schemes, [])
+
     links =
-      Regex.scan(@link_regex, text)
-      |> Enum.map(fn [url] -> {Ecto.UUID.generate(), url} end)
+      text
+      |> String.split([" ", "\t", "<br>"])
+      |> Enum.filter(fn word -> String.starts_with?(word, @uri_schemes ++ additionnal_schemes) end)
+      |> Enum.filter(fn word -> Regex.match?(@link_regex, word) end)
+      |> Enum.map(fn url -> {Ecto.UUID.generate(), url} end)
       |> Enum.sort_by(fn {_, url} -> -String.length(url) end)
 
     uuid_text =

test/formatter_test.exs

@@ -85,6 +85,12 @@ test "turning urls into links" do
         "<a href=\"https://pleroma.com\">https://pleroma.com</a> <a href=\"https://pleroma.com/sucks\">https://pleroma.com/sucks</a>"
 
       assert Formatter.add_links({[], text}) |> Formatter.finalize() == expected
+
+      text = "xmpp:contact@hacktivis.me"
+
+      expected = "<a href=\"xmpp:contact@hacktivis.me\">xmpp:contact@hacktivis.me</a>"
+
+      assert Formatter.add_links({[], text}) |> Formatter.finalize() == expected
     end
   end