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[rails.git] / app / helpers / user_helper.rb
1 module UserHelper
2   # User images
3
4   def user_image(user, options = {})
5     options[:class] ||= "user_image border border-grey"
6     options[:alt] ||= ""
7
8     if user.image_use_gravatar
9       user_gravatar_tag(user, options)
10     elsif user.avatar.attached?
11       user_avatar_variant_tag(user, { :resize_to_limit => [100, 100] }, options)
12     else
13       image_tag "avatar_large.png", options.merge(:width => 100, :height => 100)
14     end
15   end
16
17   def user_thumbnail(user, options = {})
18     options[:class] ||= "user_thumbnail border border-grey"
19     options[:alt] ||= ""
20
21     if user.image_use_gravatar
22       user_gravatar_tag(user, options.merge(:size => 50))
23     elsif user.avatar.attached?
24       user_avatar_variant_tag(user, { :resize_to_limit => [50, 50] }, options)
25     else
26       image_tag "avatar_small.png", options.merge(:width => 50, :height => 50)
27     end
28   end
29
30   def user_thumbnail_tiny(user, options = {})
31     options[:class] ||= "user_thumbnail_tiny border border-grey"
32     options[:alt] ||= ""
33
34     if user.image_use_gravatar
35       user_gravatar_tag(user, options.merge(:size => 50))
36     elsif user.avatar.attached?
37       user_avatar_variant_tag(user, { :resize_to_limit => [50, 50] }, options)
38     else
39       image_tag "avatar_small.png", options.merge(:width => 50, :height => 50)
40     end
41   end
42
43   def user_image_url(user, options = {})
44     if user.image_use_gravatar
45       user_gravatar_url(user, options)
46     elsif user.avatar.attached?
47       polymorphic_url(user_avatar_variant(user, :resize_to_limit => [100, 100]), :host => Settings.server_url)
48     else
49       image_url("avatar_large.png")
50     end
51   end
52
53   # External authentication support
54
55   def openid_logo
56     image_tag "openid_small.png", :alt => t("sessions.new.openid_logo_alt"), :class => "align-text-bottom"
57   end
58
59   def auth_button(name, provider, options = {})
60     link_to(
61       image_tag("#{name}.svg", :alt => t("sessions.new.auth_providers.#{name}.alt"), :class => "rounded-3"),
62       auth_path(options.merge(:provider => provider)),
63       :method => :post,
64       :class => "auth_button",
65       :title => t("sessions.new.auth_providers.#{name}.title")
66     )
67   end
68
69   private
70
71   # Local avatar support
72   def user_avatar_variant_tag(user, variant_options, options)
73     if user.avatar.variable?
74       variant = user.avatar.variant(variant_options)
75       # https://stackoverflow.com/questions/61893089/get-metadata-of-active-storage-variant/67228171
76       if variant.send(:processed?)
77         metadata = variant.processed.send(:record).image.blob.metadata
78         if metadata["width"]
79           options[:width] = metadata["width"]
80           options[:height] = metadata["height"]
81         end
82       end
83       image_tag variant, options
84     else
85       image_tag user.avatar, options
86     end
87   end
88
89   def user_avatar_variant(user, options)
90     if user.avatar.variable?
91       user.avatar.variant(options)
92     else
93       user.avatar
94     end
95   end
96
97   # Gravatar support
98
99   # See http://en.gravatar.com/site/implement/images/ for details.
100   def user_gravatar_url(user, options = {})
101     size = options[:size] || 100
102     hash = Digest::MD5.hexdigest(user.email.downcase)
103     default_image_url = image_url("avatar_large.png")
104     "#{request.protocol}www.gravatar.com/avatar/#{hash}.jpg?s=#{size}&d=#{u(default_image_url)}"
105   end
106
107   def user_gravatar_tag(user, options = {})
108     url = user_gravatar_url(user, options)
109     options[:height] = options[:width] = options.delete(:size) || 100
110     image_tag url, options
111   end
112 end