Class: Vines::Storage::Sql

Inherits:
Vines::Storage show all
Defined in:
lib/vines/storage/sql.rb

Defined Under Namespace

Classes: Contact, Fragment, Group, User

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(&block) ⇒ Sql

Returns a new instance of Sql.



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# File 'lib/vines/storage/sql.rb', line 45

def initialize(&block)
  @config = {}
  instance_eval(&block)
  required = [:adapter, :database]
  required << [:host, :port] unless @config[:adapter] == 'sqlite3'
  required.flatten.each {|key| raise "Must provide #{key}" unless @config[key] }
  [:username, :password].each {|key| @config.delete(key) if empty?(@config[key]) }
  establish_connection
end

Class Method Details

.with_connection(method, args = {}) ⇒ Object

Wrap the method with ActiveRecord connection pool logic, so we properly return connections to the pool when we’re finished with them. This also defers the original method by pushing it onto the EM thread pool because ActiveRecord uses blocking IO.



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# File 'lib/vines/storage/sql.rb', line 24

def self.with_connection(method, args={})
  deferrable = args.key?(:defer) ? args[:defer] : true
  old = instance_method(method)
  define_method method do |*args|
    ActiveRecord::Base.connection_pool.with_connection do
      old.bind(self).call(*args)
    end
  end
  defer(method) if deferrable
end

Instance Method Details

#create_schema(args = {}) ⇒ Object

Create the tables and indexes used by this storage engine.



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# File 'lib/vines/storage/sql.rb', line 150

def create_schema(args={})
  args[:force] ||= false

  ActiveRecord::Schema.define do
    create_table :users, force: args[:force] do |t|
      t.string :jid,      limit: 512, null: false
      t.string :name,     limit: 256, null: true
      t.string :password, limit: 256, null: true
      t.text   :vcard,    null: true
    end
    add_index :users, :jid, unique: true

    create_table :contacts, force: args[:force] do |t|
      t.integer :user_id,      null: false
      t.string  :jid,          limit: 512, null: false
      t.string  :name,         limit: 256, null: true
      t.string  :ask,          limit: 128, null: true
      t.string  :subscription, limit: 128, null: false
    end
    add_index :contacts, [:user_id, :jid], unique: true

    create_table :groups, force: args[:force] do |t|
      t.string :name, limit: 256, null: false
    end
    add_index :groups, :name, unique: true

    create_table :contacts_groups, id: false, force: args[:force] do |t|
      t.integer :contact_id, null: false
      t.integer :group_id,   null: false
    end
    add_index :contacts_groups, [:contact_id, :group_id], unique: true

    create_table :fragments, force: args[:force] do |t|
      t.integer :user_id,   null: false
      t.string  :root,      limit: 256, null: false
      t.string  :namespace, limit: 256, null: false
      t.text    :xml,       null: false
    end
    add_index :fragments, [:user_id, :root, :namespace], unique: true
  end
end

#find_fragment(jid, node) ⇒ Object 



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# File 'lib/vines/storage/sql.rb', line 128

def find_fragment(jid, node)
  jid = JID.new(jid).bare.to_s
  return if jid.empty?
  if fragment = fragment_by_jid(jid, node)
    Nokogiri::XML(fragment.xml).root rescue nil
  end
end

#find_user(jid) ⇒ Object 



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# File 'lib/vines/storage/sql.rb', line 55

def find_user(jid)
  jid = JID.new(jid).bare.to_s
  return if jid.empty?
  xuser = user_by_jid(jid)
  return Vines::User.new(jid: jid).tap do |user|
    user.name, user.password = xuser.name, xuser.password
    xuser.contacts.each do |contact|
      groups = contact.groups.map {|group| group.name }
      user.roster << Vines::Contact.new(
        jid: contact.jid,
        name: contact.name,
        subscription: contact.subscription,
        ask: contact.ask,
        groups: groups)
    end
  end if xuser
end

#find_vcard(jid) ⇒ Object 



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# File 'lib/vines/storage/sql.rb', line 110

def find_vcard(jid)
  jid = JID.new(jid).bare.to_s
  return if jid.empty?
  if xuser = user_by_jid(jid)
    Nokogiri::XML(xuser.vcard).root rescue nil
  end
end

#save_fragment(jid, node) ⇒ Object 



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# File 'lib/vines/storage/sql.rb', line 137

def save_fragment(jid, node)
  jid = JID.new(jid).bare.to_s
  fragment = fragment_by_jid(jid, node) ||
    Sql::Fragment.new(
      user: user_by_jid(jid),
      root: node.name,
      namespace: node.namespace.href)
  fragment.xml = node.to_xml
  fragment.save
end

#save_user(user) ⇒ Object 



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# File 'lib/vines/storage/sql.rb', line 74

def save_user(user)
  xuser = user_by_jid(user.jid) || Sql::User.new(jid: user.jid.bare.to_s)
  xuser.name = user.name
  xuser.password = user.password

  # remove deleted contacts from roster
  xuser.contacts.delete(xuser.contacts.select do |contact|
    !user.contact?(contact.jid)
  end)

  # update contacts
  xuser.contacts.each do |contact|
    fresh = user.contact(contact.jid)
    contact.update_attributes(
      name: fresh.name,
      ask: fresh.ask,
      subscription: fresh.subscription,
      groups: groups(fresh))
  end

  # add new contacts to roster
  jids = xuser.contacts.map {|c| c.jid }
  user.roster.select {|contact| !jids.include?(contact.jid.bare.to_s) }
    .each do |contact|
      xuser.contacts.build(
        user: xuser,
        jid: contact.jid.bare.to_s,
        name: contact.name,
        ask: contact.ask,
        subscription: contact.subscription,
        groups: groups(contact))
    end
  xuser.save
end

#save_vcard(jid, card) ⇒ Object 



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# File 'lib/vines/storage/sql.rb', line 119

def save_vcard(jid, card)
  xuser = user_by_jid(jid)
  if xuser
    xuser.vcard = card.to_xml
    xuser.save
  end
end