From dd50144bcd4dbd605995123ab5afc99e40e9a630 Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Fri, 30 Jun 2017 19:12:58 +0200
Subject: First sketching

---
 lib/active_file/blob.rb      | 45 ++++++++++++++++++++++++++++++++++++++++++++
 lib/active_file/filename.rb  | 31 ++++++++++++++++++++++++++++++
 lib/active_file/migration.rb | 14 ++++++++++++++
 lib/active_file/purge_job.rb |  7 +++++++
 lib/active_file/railtie.rb   |  6 ++++++
 lib/active_file/store.rb     | 26 +++++++++++++++++++++++++
 6 files changed, 129 insertions(+)
 create mode 100644 lib/active_file/blob.rb
 create mode 100644 lib/active_file/filename.rb
 create mode 100644 lib/active_file/migration.rb
 create mode 100644 lib/active_file/purge_job.rb
 create mode 100644 lib/active_file/railtie.rb
 create mode 100644 lib/active_file/store.rb

(limited to 'lib/active_file')

diff --git a/lib/active_file/blob.rb b/lib/active_file/blob.rb
new file mode 100644
index 0000000000..248b136903
--- /dev/null
+++ b/lib/active_file/blob.rb
@@ -0,0 +1,45 @@
+# Schema: id, token, filename, content_type, metadata, byte_size, digest, created_at
+class ActiveFile::Blob < ActiveRecord::Base
+  self.table_name = "rails_active_file_blobs"
+
+  store :metadata, coder: JSON
+  has_secure_token
+
+  class_attribute :verifier, default: -> { Rails.application.message_verifier('ActiveFile') }
+  class_attribute :storage
+
+  class << self
+    def find_verified(signed_id)
+      find(verifier.verify(signed_id))
+    end
+
+    def build_after_upload(data:, filename:, content_type: nil, metadata: nil)
+      new.tap do |blob|
+        blob.filename = name
+        blob.content_type = Marcel::MimeType.for(data, name: name, declared_type: content_type)
+        blob.data = data
+      end
+    end
+
+    def create_after_upload!(data:, filename:, content_type: nil, metadata: nil)
+      build_after_upload(data: data, filename: filename, content_type: content_type, metadata: metadata).tap(&:save!)
+    end
+  end
+
+  def filename
+    Filename.new(filename)
+  end
+
+  def delete
+    storage.delete token
+  end
+
+  def purge
+    delete
+    destroy
+  end
+
+  def purge_later
+    ActiveFile::PurgeJob.perform_later(self)
+  end
+end
diff --git a/lib/active_file/filename.rb b/lib/active_file/filename.rb
new file mode 100644
index 0000000000..b3c184e26c
--- /dev/null
+++ b/lib/active_file/filename.rb
@@ -0,0 +1,31 @@
+class ActiveFile::Filename
+  include Comparable
+
+  def initialize(filename)
+    @filename = filename
+  end
+
+  def extname
+    File.extname(@filename)
+  end
+
+  def extension
+    extname.from(1)
+  end
+
+  def base
+    File.basename(@filename, extname)
+  end
+
+  def sanitized
+    @filename.encode(Encoding::UTF_8, invalid: :replace, undef: :replace, replace: "�").strip.tr("\u{202E}%$|:;/\t\r\n\\", "-")
+  end
+
+  def to_s
+    sanitized.to_s
+  end
+
+  def <=>(other)
+    to_s.downcase <=> other.to_s.downcase
+  end
+end
diff --git a/lib/active_file/migration.rb b/lib/active_file/migration.rb
new file mode 100644
index 0000000000..0f6b0a3fd2
--- /dev/null
+++ b/lib/active_file/migration.rb
@@ -0,0 +1,14 @@
+class ActiveFile::CreateBlobs < ActiveRecord::Migration[5.2]
+  def change
+    create_table :rails_active_file_blobs do |t|
+      t.string :token
+      t.string :filename
+      t.string :content_type
+      t.integer :byte_size
+      t.string :digest
+      t.time :created_at
+
+      t.index [ :token ], unique: true
+    end
+  end
+end
diff --git a/lib/active_file/purge_job.rb b/lib/active_file/purge_job.rb
new file mode 100644
index 0000000000..1a967db2f0
--- /dev/null
+++ b/lib/active_file/purge_job.rb
@@ -0,0 +1,7 @@
+class ActiveFile::PurgeJob < ActiveJob::Base
+  retry_on ActiveFile::StorageException
+
+  def perform(blob)
+    blob.purge
+  end
+end
diff --git a/lib/active_file/railtie.rb b/lib/active_file/railtie.rb
new file mode 100644
index 0000000000..ccba844742
--- /dev/null
+++ b/lib/active_file/railtie.rb
@@ -0,0 +1,6 @@
+require 'rails/railtie'
+
+module ActiveFile
+  class Engine < ::Rails::Engine
+  end
+end
diff --git a/lib/active_file/store.rb b/lib/active_file/store.rb
new file mode 100644
index 0000000000..bdac4eab9e
--- /dev/null
+++ b/lib/active_file/store.rb
@@ -0,0 +1,26 @@
+class ActiveFile::Store
+  def upload(key, data)
+  end
+
+  def download(key)
+  end
+
+  def delete(key)
+  end
+
+  def exists?(key)
+  end
+
+  def url(key)
+  end
+
+  def checksum(key)
+  end
+
+
+  def copy(from_key:, to_key:)
+  end
+
+  def move(from_key:, to_key:)
+  end
+end
-- 
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