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defmodule Nola.Plugins.Link.Imgur do
@behaviour Nola.Plugins.Link
@moduledoc """
# Imgur link preview
No options.
Needs to have a Imgur API key configured:
```
config :nola, :imgur,
client_id: "xxxxxxxx",
client_secret: "xxxxxxxxxxxxxxxxxxxx"
```
"""
@impl true
def match(uri = %URI{host: "imgur.io"}, arg) do
match(%URI{uri | host: "imgur.com"}, arg)
end
def match(uri = %URI{host: "i.imgur.io"}, arg) do
match(%URI{uri | host: "i.imgur.com"}, arg)
end
def match(uri = %URI{host: "imgur.com", path: "/a/"<>album_id}, _) do
{true, %{album_id: album_id}}
end
def match(uri = %URI{host: "imgur.com", path: "/gallery/"<>album_id}, _) do
{true, %{album_id: album_id}}
end
def match(uri = %URI{host: "i.imgur.com", path: "/"<>image}, _) do
[hash, _] = String.split(image, ".", parts: 2)
{true, %{image_id: hash}}
end
def match(_, _), do: false
@impl true
def post_match(_, _, _, _), do: false
def expand(_uri, %{album_id: album_id}, opts) do
expand_imgur_album(album_id, opts)
end
def expand(_uri, %{image_id: image_id}, opts) do
expand_imgur_image(image_id, opts)
end
def expand_imgur_image(image_id, opts) do
client_id = Keyword.get(Application.get_env(:nola, :imgur, []), :client_id, "42")
headers = [{"Authorization", "Client-ID #{client_id}"}]
options = []
case HTTPoison.get("https://api.imgur.com/3/image/#{image_id}", headers, options) do
{:ok, %HTTPoison.Response{status_code: 200, body: body}} ->
{:ok, json} = Jason.decode(body)
data = json["data"]
title = String.slice(data["title"] || data["description"], 0, 180)
nsfw = if data["nsfw"], do: "(NSFW) - ", else: " "
height = Map.get(data, "height")
width = Map.get(data, "width")
size = Map.get(data, "size")
{:ok, "image, #{width}x#{height}, #{size} bytes #{nsfw}#{title}"}
other ->
:error
end
end
def expand_imgur_album(album_id, opts) do
client_id = Keyword.get(Application.get_env(:nola, :imgur, []), :client_id, "42")
headers = [{"Authorization", "Client-ID #{client_id}"}]
options = []
case HTTPoison.get("https://api.imgur.com/3/album/#{album_id}", headers, options) do
{:ok, %HTTPoison.Response{status_code: 200, body: body}} ->
{:ok, json} = Jason.decode(body)
data = json["data"]
title = data["title"]
nsfw = data["nsfw"]
nsfw = if nsfw, do: "(NSFW) - ", else: ""
if data["images_count"] == 1 do
[image] = data["images"]
title = if title || data["title"] do
title = [title, data["title"]] |> Enum.filter(fn(x) -> x end) |> Enum.uniq() |> Enum.join(" — ")
"#{title} — "
else
""
end
{:ok, "#{nsfw}#{title}#{image["link"]}"}
else
title = if title, do: title, else: "Untitled album"
{:ok, "#{nsfw}#{title} - #{data["images_count"]} images"}
end
other ->
:error
end
end
end

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imgur.ex (2 KB)

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