Add activerecord, migrate to SQLite3

.gitignore

@@ -4,6 +4,6 @@
 Gemfile.lock
 .yardoc/
 .dev/
-doc/
+.doc/
 pkg/
 .gems/

twenty-backend/lib/twenty-backend.rb

@@ -1,5 +1,8 @@
 # frozen_string_literal: true
 module Twenty
   require "webrick"
+  require "active_record"
   require_relative "twenty-backend/servlet"
+  require_relative "twenty-backend/migration"
+  require_relative "twenty-backend/model"
 end

twenty-backend/lib/twenty-backend/migration.rb

@@ -0,0 +1,11 @@
+module Twenty::Migration
+  require_relative "migration/create_connections"
+  require_relative "migration/create_issues"
+
+  def self.run!
+    CreateConnections.migrate(:up)
+    CreateIssues.migrate(:up)
+  rescue
+    warn "#{$!.class}: #{$!.message}"
+  end
+end

twenty-backend/lib/twenty-backend/migration/create_connections.rb

@@ -0,0 +1,15 @@
+module Twenty::Migration
+  class CreateConnections < ActiveRecord::Migration[7.1]
+    def up
+      create_table(:connections) do |t|
+        t.string :name, null: false
+        t.string :path, null: false
+        t.timestamps
+      end
+    end
+
+    def down
+      drop_table(:connections)
+    end
+  end
+end

twenty-backend/lib/twenty-backend/migration/create_issues.rb

@@ -0,0 +1,17 @@
+module Twenty::Migration
+  class CreateIssues < ActiveRecord::Migration[7.1]
+    def up
+      create_table(:issues) do |t|
+        t.string :title, null: false
+        t.text :content, null: false
+        t.string :state, null: false
+        t.belongs_to :connection, null: false
+        t.timestamps
+      end
+    end
+
+    def down
+      drop_table(:issues)
+    end
+  end
+end

twenty-backend/lib/twenty-backend/model.rb

@@ -0,0 +1,46 @@
+class Twenty::Model < ActiveRecord::Base
+  require "fileutils"
+  extend FileUtils
+
+  ##
+  # @return [String]
+  #  Returns the path to a SQLite database.
+  def self.database
+    File.join(home, "twenty.sqlite")
+  end
+
+  ##
+  # @return [String]
+  #  Returns a path to the directory where twenty writes data.
+  def self.home
+    File.join(Dir.home, ".local", "share", "twenty")
+  end
+
+  ##
+  # Establishes a database connection.
+  # @return [void]
+  # @api private
+  def self.connect
+    ActiveRecord::Base.establish_connection(
+      adapter: 'sqlite3',
+      database:,
+      pool: 3
+    )
+  end
+
+  ##
+  # Creates the {home home} directory.
+  # @return [void]
+  # @api private
+  def self.prepare
+    return if File.exist?(database)
+    mkdir_p(home)
+    touch(database)
+  end
+
+  prepare
+  connect
+  require_relative "model/connection"
+  require_relative "model/issue"
+  Twenty::Migration.run!
+end

twenty-backend/lib/twenty-backend/model/connection.rb

@@ -0,0 +1,10 @@
+class Twenty::Connection < Twenty::Model
+  ##
+  # Validations
+  validates :name, presence: true
+  validates :path, presence: true
+
+  ##
+  # Associations
+  has_many :issues, class_name: 'Twenty::Issue'
+end

twenty-backend/lib/twenty-backend/model/issue.rb

@@ -0,0 +1,12 @@
+class Twenty::Issue < Twenty::Model
+  ##
+  # Validations
+  validates :title, presence: true
+  validates :content, presence: true
+  validates :state, inclusion: {in: %w[open closed]}
+  validates :connection, presence: true
+
+  ##
+  # Associations
+  belongs_to :connection, class_name: 'Twenty::Connection'
+end

twenty-backend/lib/twenty-backend/servlet.rb

@@ -1,6 +1,6 @@
 class Twenty::Servlet < WEBrick::HTTPServlet::AbstractServlet
-  include Twenty::DB
   require_relative "servlet/connections"
+  require_relative "servlet/issues"
 
   private
   def write(res, ary)

twenty-backend/lib/twenty-backend/servlet/issues.rb

@@ -0,0 +1,4 @@
+class Twenty::Servlet::Issues < Twenty::Servlet
+  def do_POST(req, res)
+  end
+end

twenty-backend/twenty-backend.gemspec

@@ -11,6 +11,8 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.summary = "twenty: backend"
   gem.description = gem.summary
+  gem.add_runtime_dependency "activerecord", "~> 7.1"
+  gem.add_runtime_dependency "sqlite3", "~> 1.6"
   gem.add_runtime_dependency "webrick", "~> 1.8"
   gem.add_development_dependency "test-unit", "~> 3.5.7"
   gem.add_development_dependency "standard", "~> 1.13"

twenty-cli/lib/twenty-cli.rb

@@ -1,34 +1,5 @@
 module Twenty
-  module DB
+  require "json"
-    require "json"
-    DEFAULTS = { connections: [] }
-
-    ##
-    # FIXME:
-    # The following methods are required by
-    # both twenty-cli, and twenty-backend. Eventually
-    # they should be moved into their own package.
-
-    def home
-      File.join Dir.home, ".local", "share", "twenty"
-    end
-
-    def database
-      Ryo.from DEFAULTS.dup.merge(JSON.parse(File.binread(database_path)))
-    rescue
-      Ryo.from(DEFAULTS.dup)
-    end
-
-    def database_path
-      File.join(home, "database.json")
-    end
-
-    def save!(db)
-      File.binwrite database_path,
-                    JSON.dump(Ryo.table_of(db, recursive: true))
-    end
-  end
-
   require "twenty-backend"
   require "twenty-frontend"
   require_relative "twenty-cli/command"

twenty-cli/lib/twenty-cli/command/connect.rb

@@ -1,8 +1,4 @@
 class Twenty::Command::Connect < Twenty::Command
-  require "fileutils"
-  include Twenty::DB
-  include FileUtils
-
   set_banner usage: "twenty connect [OPTIONS]",
              description: "Connect a project to twenty"
 
@@ -14,14 +10,9 @@ class Twenty::Command::Connect < Twenty::Command
   private
 
   def run_command(options)
-    mkdir_p File.dirname(database_path)
+    Twenty::Connection.new(
-    path = Dir.getwd
+      name: File.basename(Dir.getwd),
-    name = File.basename(path)
+      path: Dir.getwd,
-    db.connections.push({name:, path:})
+    ).save!
-    save!(db)
-  end
-
-  def db
-    @db ||= database
   end
 end