Remove finmoji and add a way to download emojis in packs

These packs are stored in a git repo on pleroma gitlab

lib/mix/tasks/pleroma/emoji.ex

@@ -0,0 +1,98 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Mix.Tasks.Pleroma.Emoji do
+  use Mix.Task
+
+  @shortdoc "Manages Pleroma instance"
+  @moduledoc """
+  """
+
+  defp fetch_manifest do
+    Tesla.get!("https://git.pleroma.social/vaartis/emoji-index/raw/master/index.json").body
+    |> Poison.decode!()
+  end
+
+  def run(["ls-packs"]) do
+    Application.ensure_all_started(:hackney)
+
+    manifest = fetch_manifest()
+
+    Enum.each(manifest, fn {name, info} ->
+      to_print = [
+        {"Name", name},
+        {"Homepage", info["homepage"]},
+        {"Description", info["description"]},
+        {"License", info["license"]},
+        {"Source", info["src"]}
+      ]
+
+      for {param, value} <- to_print do
+        IO.puts(IO.ANSI.format([:bright, param, :normal, ": ", value]))
+      end
+    end)
+  end
+
+  def run(["get-pack", pack_name]) do
+    Application.ensure_all_started(:hackney)
+
+    manifest = fetch_manifest()
+
+    if Map.has_key?(manifest, pack_name) do
+      pack = manifest[pack_name]
+      src_url = pack["src"]
+
+      IO.puts(
+        IO.ANSI.format([
+          "Downloading pack ",
+          :bright,
+          pack_name,
+          :normal,
+          " from ",
+          :underline,
+          src_url
+        ])
+      )
+
+      binary_archive = Tesla.get!(src_url).body
+
+      IO.puts("Unpacking #{pack_name} pack")
+
+      static_path = Path.join(:code.priv_dir(:pleroma), "static")
+
+      pack_path =
+        Path.join([
+          static_path,
+          Pleroma.Config.get!([:instance, :static_dir]),
+          "emoji",
+          pack_name
+        ])
+
+      files_to_unzip =
+        Enum.map(
+          pack["files"],
+          fn {_, f} -> to_charlist(f) end
+        )
+
+      {:ok, _} =
+        :zip.unzip(binary_archive,
+          cwd: pack_path,
+          file_list: files_to_unzip
+        )
+
+      IO.puts("Wriring emoji.txt for the #{pack_name} pack")
+
+      emoji_txt_str =
+        Enum.map(
+          pack["files"],
+          fn {shortcode, path} -> "#{shortcode}, /instance/static/emoji/#{pack_name}/#{path}" end
+        )
+        |> Enum.join("\n")
+
+      File.write!(Path.join(pack_path, "emoji.txt"), emoji_txt_str)
+    else
+      IO.puts(IO.ANSI.format([:bright, :red, "No pack named \"#{pack_name}\" found"]))
+    end
+  end
+end