trabajo-afectivo/lib/static_assets.rb

172 lines
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module StaticAssets
=begin
file_attributes = StaticAssets.data_url_attributes(data_url)
returns
{
mime_type: 'image/png',
content: image_bin_content,
}
=end
def self.data_url_attributes(data_url)
data = {}
if data_url =~ /^data:(.+?);base64,(.+?)$/
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data[:mime_type] = $1
data[:content] = Base64.decode64($2)
return data
end
fail "Unable to parse data url: #{data_url.substr(0, 100)}"
end
=begin
store image 1:1 in backend and return filename
filename = StaticAssets.store_raw( content, content_type )
returns
filename # hash.png
=end
def self.store_raw(content, content_type)
Store.remove(object: 'System::Logo', o_id: 1)
file = Store.add(
object: 'System::Logo',
o_id: 1,
data: content,
filename: 'logo_raw',
preferences: {
'Content-Type' => content_type
},
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created_by_id: 1,
)
filename(file)
end
=begin
read image 1:1 size in backend and return file (Store model)
store = StaticAssets.read_raw
returns
store # Store model, e.g. store.content or store.preferences
=end
def self.read_raw
list = Store.list(object: 'System::Logo', o_id: 1)
if list && list[0]
return Store.find( list[0] )
end
fail 'No such raw logo!'
end
=begin
store image in right size (resized) in backend and return filename
filename = StaticAssets.store( content, content_type )
returns
filename # hash.png
=end
def self.store(content, content_type)
Store.remove(object: 'System::Logo', o_id: 2)
file = Store.add(
object: 'System::Logo',
o_id: 2,
data: content,
filename: 'logo',
preferences: {
'Content-Type' => content_type
},
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created_by_id: 1,
)
StaticAssets.sync
filename(file)
end
=begin
read image size from backend (if not exists, read 1:1 size) and return file (Store model)
store = StaticAssets.read
returns
store # Store model, e.g. store.content or store.preferences
=end
def self.read
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# use reduced dimensions
list = Store.list(object: 'System::Logo', o_id: 2)
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# as fallback use 1:1
if !list || !list[0]
list = Store.list(object: 'System::Logo', o_id: 1)
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end
# store hash in config
if list && list[0]
file = Store.find(list[0])
filelocation = filename(file)
Setting.set('product_logo', filelocation)
return file
end
end
=begin
generate filename based on Store model
filename = StaticAssets.filename(store)
=end
def self.filename(file)
hash = Digest::MD5.hexdigest(file.content)
extention = ''
if file.preferences['Content-Type'] =~ /jpg|jpeg/i
extention = '.jpg'
elsif file.preferences['Content-Type'] =~ /png/i
extention = '.png'
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elsif file.preferences['Content-Type'] =~ /gif/i
extention = '.gif'
elsif file.preferences['Content-Type'] =~ /svg/i
extention = '.svg'
end
"#{hash}#{extention}"
end
=begin
sync image to fs (public/assets/images/hash.png)
StaticAssets.sync
=end
def self.sync
file = read
return if !file
path = "#{Rails.root}/public/assets/images/#{filename(file)}"
File.open( path, 'wb' ) do |f|
f.puts file.content
end
end
end