Mike Dalessio
62 lines
1.8 KiB
Ruby
62 lines
1.8 KiB
Ruby
require "zlib"
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module User::Avatar
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extend ActiveSupport::Concern
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ALLOWED_AVATAR_CONTENT_TYPES = %w[ image/jpeg image/png image/gif image/webp ].freeze
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MAX_AVATAR_DIMENSIONS = { width: 4096, height: 4096 }.freeze
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AVATAR_COLORS = %w[
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#AF2E1B #CC6324 #3B4B59 #BFA07A #ED8008 #ED3F1C #BF1B1B #736B1E #D07B53
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#736356 #AD1D1D #BF7C2A #C09C6F #698F9C #7C956B #5D618F #3B3633 #67695E
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].freeze
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included do
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has_one_attached :avatar, dependent: :purge_later do |attachable|
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attachable.variant :thumb, resize_to_fill: [ 256, 256 ], process: :immediately
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end
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scope :with_avatars, -> { preload(:account, :avatar_attachment) }
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validate :avatar_content_type_allowed, :avatar_dimensions_allowed, if: :avatar_attached?
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end
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def avatar_attached?
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avatar.attached?
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end
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def avatar_thumbnail
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avatar.variable? ? avatar.variant(:thumb) : avatar
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end
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def avatar_background_color
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AVATAR_COLORS[Zlib.crc32(to_param) % AVATAR_COLORS.size]
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end
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# Avatars are always publicly accessible
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def publicly_accessible?
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true
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end
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private
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def avatar_content_type_allowed
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unless ALLOWED_AVATAR_CONTENT_TYPES.include?(avatar.content_type)
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errors.add(:avatar, "must be a JPEG, PNG, GIF, or WebP image")
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end
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end
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def avatar_dimensions_allowed
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return unless avatar.blob.analyzed? || avatar.blob.analyze
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width = avatar.blob.metadata[:width]
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height = avatar.blob.metadata[:height]
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if width && width > MAX_AVATAR_DIMENSIONS[:width]
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errors.add(:avatar, "width must be less than #{MAX_AVATAR_DIMENSIONS[:width]}px")
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end
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if height && height > MAX_AVATAR_DIMENSIONS[:height]
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errors.add(:avatar, "height must be less than #{MAX_AVATAR_DIMENSIONS[:height]}px")
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end
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end
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end
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