From f47e9d48a2d26e92723ae96d3d65a1ba005f426f Mon Sep 17 00:00:00 2001
From: Hakim Cassimally <hakim@mysociety.org>
Date: Tue, 15 Jul 2014 17:14:00 +0000
Subject: Open311 Role for accepting default config file

See also MooX::ConfigFromFile, but that's underdocumented and
seems overengineered -- may be worth implementing if requirements
become more complex however.  (See also Config::Any, which is
well worth doing in future, using YAML only reflects current
usage in FMS though.)
---
 perllib/Open311/Endpoint/Role/ConfigFile.pm | 30 +++++++++++++++++++++++++++++
 t/open311/endpoint/config1.yml              |  1 +
 t/open311/endpoint/configfile.t             | 23 ++++++++++++++++++++++
 3 files changed, 54 insertions(+)
 create mode 100644 perllib/Open311/Endpoint/Role/ConfigFile.pm
 create mode 100644 t/open311/endpoint/config1.yml
 create mode 100644 t/open311/endpoint/configfile.t

diff --git a/perllib/Open311/Endpoint/Role/ConfigFile.pm b/perllib/Open311/Endpoint/Role/ConfigFile.pm
new file mode 100644
index 000000000..1c4b83355
--- /dev/null
+++ b/perllib/Open311/Endpoint/Role/ConfigFile.pm
@@ -0,0 +1,30 @@
+package Open311::Endpoint::Role::ConfigFile;
+use Moo::Role;
+use Path::Tiny 'path';
+use Carp 'croak';
+use YAML ();
+use Types::Standard qw( Maybe Str );
+
+has config_file => (
+    is => 'ro',
+    isa => Maybe[Str],
+);
+
+around BUILDARGS => sub {
+    my $next = shift;
+    my $class = shift;
+
+    my %args = @_;
+    if (my $config_file = $args{config_file}) {
+        my $cfg = path($config_file);
+        croak "$config_file is not a file" unless $cfg->is_file;
+
+        my $config = YAML::LoadFile($cfg) or croak "Couldn't load config from $config_file";
+        return $class->$next(%$config, %args);
+    }
+    else {
+        return $class->$next(%args);
+    }
+};
+
+1;
diff --git a/t/open311/endpoint/config1.yml b/t/open311/endpoint/config1.yml
new file mode 100644
index 000000000..c444f32c5
--- /dev/null
+++ b/t/open311/endpoint/config1.yml
@@ -0,0 +1 @@
+foo: baz
diff --git a/t/open311/endpoint/configfile.t b/t/open311/endpoint/configfile.t
new file mode 100644
index 000000000..7f41468ba
--- /dev/null
+++ b/t/open311/endpoint/configfile.t
@@ -0,0 +1,23 @@
+use strict; use warnings;
+
+BEGIN {
+    package Foo;
+    use Moo;
+    with 'Open311::Endpoint::Role::ConfigFile';
+
+    has foo => ( is => 'ro', default => 'foo' );
+}
+
+package main;
+use Test::More;
+
+is +Foo->new->foo, 
+    'foo', 'sanity';
+is +Foo->new( foo => 'bar')->foo,
+    'bar', 'override';
+is +Foo->new( config_file => 't/open311/endpoint/config1.yml' )->foo,
+    'baz', 'with config';
+is +Foo->new( config_file => 't/open311/endpoint/config1.yml', foo => 'qux' )->foo,
+    'qux', 'with config, overridden';
+
+done_testing;
-- 
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