Rename database client files to put them in a `Client` module

Will be modifying the class names in the next commit. Here we change the
file names & locations of the database client files.

The format changes thusly:

    <adapter>_client.rb -> client/<adapter>.rb

This organisation feels cleaner to me. Wasn't liking the previous
structure.

1 files changed, 24 insertions, 0 deletions

diff --git a/lib/dbshell/client/database.rb b/lib/dbshell/client/database.rb
new file mode 100644
index 0000000..edea777
--- /dev/null
+++ b/lib/dbshell/client/database.rb
@@ -0,0 +1,24 @@
+require 'dbshell/sqlite3_client'
+require 'dbshell/postgres_client'
+
+class DBShell::DatabaseClient
+  def self.handler(connection_params)
+    case connection_params['adapter']
+    when 'sqlite3'
+      DBShell::Sqlite3Client
+    when 'postgresql'
+      DBShell::PostgresClient
+    else
+      raise DBShell::InvalidDatabaseAdapter
+    end
+  end
+
+  def self.runshell(connection_params)
+    self
+      .handler(connection_params)
+      .runshell(connection_params)
+  end
+end
+
+
+class DBShell::InvalidDatabaseAdapter < StandardError; end