app/helpers/user_helper.rb

   1 module UserHelper
   2   # User images
   3
   4   def user_image(user, options = {})
   5     options[:class] ||= "user_image"
   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"
  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"
  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 => "openid_logo"
  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-lg"),
  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.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