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 bg-body"
   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.svg", 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 bg-body"
  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.svg", 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 bg-body"
  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.svg", options.merge(:width => 50, :height => 50)
  40     end
  41   end
  42
  43   def user_image_url(user)
  44     if user.image_use_gravatar
  45       user_gravatar_url(user)
  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.svg")
  50     end
  51   end
  52
  53   # External authentication support
  54
  55   def auth_button(provider, preferred: false)
  56     body = image_tag("auth_providers/#{provider}.svg",
  57                      :alt => t("application.auth_providers.#{provider}.alt"),
  58                      :class => "rounded-1",
  59                      :size => "36")
  60     body += t("application.auth_providers.#{provider}.title") if preferred
  61     link_to(
  62       body,
  63       auth_path(:provider => provider),
  64       :method => :post,
  65       :class => ["auth_button btn btn-outline-secondary border p-2", { "px-4 d-flex gap-3 justify-content-center align-items-center" => preferred }],
  66       :title => t("application.auth_providers.#{provider}.title")
  67     )
  68   end
  69
  70   private
  71
  72   # Local avatar support
  73   def user_avatar_variant_tag(user, variant_options, options)
  74     if user.avatar.variable?
  75       variant = user.avatar.variant(variant_options)
  76       # https://stackoverflow.com/questions/61893089/get-metadata-of-active-storage-variant/67228171
  77       if variant.send(:processed?)
  78         metadata = variant.processed.send(:record).image.blob.metadata
  79         if metadata["width"]
  80           options[:width] = metadata["width"]
  81           options[:height] = metadata["height"]
  82         end
  83       end
  84       image_tag variant, options
  85     else
  86       image_tag user.avatar, options
  87     end
  88   end
  89
  90   def user_avatar_variant(user, options)
  91     if user.avatar.variable?
  92       user.avatar.variant(options)
  93     else
  94       user.avatar
  95     end
  96   end
  97
  98   # Gravatar support
  99
 100   # See http://en.gravatar.com/site/implement/images/ for details.
 101   def user_gravatar_url(user, options = {})
 102     size = options[:size] || 100
 103     hash = Digest::MD5.hexdigest(user.email.downcase)
 104     default_image_url = image_url("avatar_large.png")
 105     "#{request.protocol}www.gravatar.com/avatar/#{hash}.jpg?s=#{size}&d=#{u(default_image_url)}"
 106   end
 107
 108   def user_gravatar_tag(user, options = {})
 109     url = user_gravatar_url(user, options)
 110     options[:height] = options[:width] = options.delete(:size) || 100
 111     image_tag url, options
 112   end
 113 end