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-secondary-subtle"
   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-secondary-subtle"
  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-secondary-subtle"
  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",
  62                 :alt => t("sessions.new.auth_providers.#{name}.alt"),
  63                 :class => "rounded-3",
  64                 :size => "36"),
  65       auth_path(options.merge(:provider => provider)),
  66       :method => :post,
  67       :class => "auth_button",
  68       :title => t("sessions.new.auth_providers.#{name}.title")
  69     )
  70   end
  71
  72   private
  73
  74   # Local avatar support
  75   def user_avatar_variant_tag(user, variant_options, options)
  76     if user.avatar.variable?
  77       variant = user.avatar.variant(variant_options)
  78       # https://stackoverflow.com/questions/61893089/get-metadata-of-active-storage-variant/67228171
  79       if variant.send(:processed?)
  80         metadata = variant.processed.send(:record).image.blob.metadata
  81         if metadata["width"]
  82           options[:width] = metadata["width"]
  83           options[:height] = metadata["height"]
  84         end
  85       end
  86       image_tag variant, options
  87     else
  88       image_tag user.avatar, options
  89     end
  90   end
  91
  92   def user_avatar_variant(user, options)
  93     if user.avatar.variable?
  94       user.avatar.variant(options)
  95     else
  96       user.avatar
  97     end
  98   end
  99
 100   # Gravatar support
 101
 102   # See http://en.gravatar.com/site/implement/images/ for details.
 103   def user_gravatar_url(user, options = {})
 104     size = options[:size] || 100
 105     hash = Digest::MD5.hexdigest(user.email.downcase)
 106     default_image_url = image_url("avatar_large.png")
 107     "#{request.protocol}www.gravatar.com/avatar/#{hash}.jpg?s=#{size}&d=#{u(default_image_url)}"
 108   end
 109
 110   def user_gravatar_tag(user, options = {})
 111     url = user_gravatar_url(user, options)
 112     options[:height] = options[:width] = options.delete(:size) || 100
 113     image_tag url, options
 114   end
 115 end