[gnome-online-accounts] smtp-auth-plain: Factor out the response code checks

[Debarshi Ray <debarshir src gnome org>]

commit 4b06098ee450162a6669ea8b0d0ea7f530206f80
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Mar 8 23:36:24 2013 +0100

    smtp-auth-plain: Factor out the response code checks
    
    Some of the them are used more than once, and we will be using some
    of them while implementing STARTTLS.
    
    Fixes: https://bugzilla.gnome.org/695355

 src/goabackend/goasmtpauthplain.c |  116 +++++++++++++++++++++++-------------
 1 files changed, 74 insertions(+), 42 deletions(-)
---
diff --git a/src/goabackend/goasmtpauthplain.c b/src/goabackend/goasmtpauthplain.c
index b0049a8..4091b34 100644
--- a/src/goabackend/goasmtpauthplain.c
+++ b/src/goabackend/goasmtpauthplain.c
@@ -84,6 +84,70 @@ G_DEFINE_TYPE (GoaSmtpAuthPlain, goa_smtp_auth_plain, GOA_TYPE_MAIL_AUTH);
 
 /* ---------------------------------------------------------------------------------------------------- */
 
+static gboolean
+smtp_auth_plain_check_not_220 (const gchar *response, GError **error)
+{
+  if (!g_str_has_prefix (response, "220"))
+    {
+      g_set_error (error,
+                   GOA_ERROR,
+                   GOA_ERROR_FAILED, /* TODO: more specific */
+                   "Unexpected response `%s' while doing PLAIN authentication",
+                   response);
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+static gboolean
+smtp_auth_plain_check_not_235 (const gchar *response, GError **error)
+{
+  if (!g_str_has_prefix (response, "235"))
+    {
+      g_set_error (error,
+                   GOA_ERROR,
+                   GOA_ERROR_FAILED, /* TODO: more specific */
+                   _("Authentication failed"));
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+static gboolean
+smtp_auth_plain_check_not_250 (const gchar *response, GError **error)
+{
+  if (!g_str_has_prefix (response, "250") || strlen (response) < 4)
+    {
+      g_set_error (error,
+                   GOA_ERROR,
+                   GOA_ERROR_FAILED, /* TODO: more specific */
+                   "Unexpected response `%s' while doing PLAIN authentication",
+                   response);
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+static gboolean
+smtp_auth_plain_check_421 (const gchar *response, GError **error)
+{
+  if (g_str_has_prefix (response, "421"))
+    {
+      g_set_error (error,
+                   GOA_ERROR,
+                   GOA_ERROR_FAILED, /* TODO: more specific */
+                   _("Service not available"));
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+/* ---------------------------------------------------------------------------------------------------- */
+
 static void
 goa_smtp_auth_plain_finalize (GObject *object)
 {
@@ -446,23 +510,10 @@ goa_smtp_auth_plain_run_sync (GoaMailAuth         *_auth,
   if (response == NULL)
     goto out;
   g_debug ("< %s", response);
-  if (g_str_has_prefix (response, "421"))
-    {
-      g_set_error (error,
-                   GOA_ERROR,
-                   GOA_ERROR_FAILED, /* TODO: more specific */
-                   _("Service not available"));
-      goto out;
-    }
-  if (!g_str_has_prefix (response, "220"))
-    {
-      g_set_error (error,
-                   GOA_ERROR,
-                   GOA_ERROR_FAILED, /* TODO: more specific */
-                   "Unexpected response `%s' while doing PLAIN authentication",
-                   response);
-      goto out;
-    }
+  if (smtp_auth_plain_check_421 (response, error))
+    goto out;
+  if (smtp_auth_plain_check_not_220 (response, error))
+    goto out;
   g_clear_pointer (&response, g_free);
 
   /* Send EHLO */
@@ -480,23 +531,10 @@ goa_smtp_auth_plain_run_sync (GoaMailAuth         *_auth,
   if (response == NULL)
     goto out;
   g_debug ("< %s", response);
-  if (g_str_has_prefix (response, "421"))
-    {
-      g_set_error (error,
-                   GOA_ERROR,
-                   GOA_ERROR_FAILED, /* TODO: more specific */
-                   _("Service not available"));
-      goto out;
-    }
-  if (!g_str_has_prefix (response, "250") || strlen (response) < 4)
-    {
-      g_set_error (error,
-                   GOA_ERROR,
-                   GOA_ERROR_FAILED, /* TODO: more specific */
-                   "Unexpected response `%s' while doing PLAIN authentication",
-                   response);
-      goto out;
-    }
+  if (smtp_auth_plain_check_421 (response, error))
+    goto out;
+  if (smtp_auth_plain_check_not_250 (response, error))
+    goto out;
 
   if (g_str_has_prefix (response + 4, "AUTH"))
     {
@@ -541,14 +579,8 @@ goa_smtp_auth_plain_run_sync (GoaMailAuth         *_auth,
   if (response == NULL)
     goto out;
   g_debug ("< %s", response);
-  if (!g_str_has_prefix (response, "235"))
-    {
-      g_set_error (error,
-                   GOA_ERROR,
-                   GOA_ERROR_FAILED, /* TODO: more specific */
-                   _("Authentication failed"));
-      goto out;
-    }
+  if (smtp_auth_plain_check_not_235 (response, error))
+    goto out;
   g_clear_pointer (&response, g_free);
 
   ret = TRUE;