From b2d850326af5c9ffc6486e4cc40bef6e1c051a6f Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Sat, 27 Nov 2021 01:04:37 +0100
Subject: [PATCH] Extract part of the content change job to Content.

---
 src/lib/check_content_change_job.cc | 20 +++-----------------
 src/lib/content.cc                  | 15 +++++++++++++++
 src/lib/content.h                   |  3 +++
 3 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/src/lib/check_content_change_job.cc b/src/lib/check_content_change_job.cc
index 216cf3e51..9400406bc 100644
--- a/src/lib/check_content_change_job.cc
+++ b/src/lib/check_content_change_job.cc
@@ -67,23 +67,9 @@ CheckContentChangeJob::run ()
 {
 	set_progress_unknown ();
 
-	list<shared_ptr<Content>> changed;
-
-	for (auto i: _film->content()) {
-		bool ic = false;
-		for (size_t j = 0; j < i->number_of_paths(); ++j) {
-			if (boost::filesystem::last_write_time(i->path(j)) != i->last_write_time(j)) {
-				ic = true;
-				break;
-			}
-		}
-		if (!ic && i->calculate_digest() != i->digest()) {
-			ic = true;
-		}
-		if (ic) {
-			changed.push_back (i);
-		}
-	}
+	auto content = _film->content();
+	std::vector<shared_ptr<Content>> changed;
+	std::copy_if (content.begin(), content.end(), std::back_inserter(changed), [](shared_ptr<Content> c) { return c->changed(); });
 
 	if (!changed.empty()) {
 		if (_gui) {
diff --git a/src/lib/content.cc b/src/lib/content.cc
index 064bae553..a56891689 100644
--- a/src/lib/content.cc
+++ b/src/lib/content.cc
@@ -543,3 +543,18 @@ Content::add_path (boost::filesystem::path p)
 	auto last_write = boost::filesystem::last_write_time(p, ec);
 	_last_write_times.push_back (ec ? 0 : last_write);
 }
+
+
+bool
+Content::changed () const
+{
+	bool write_time_changed = false;
+	for (auto i = 0U; i < _paths.size(); ++i) {
+		if (boost::filesystem::last_write_time(_paths[i]) != last_write_time(i)) {
+			write_time_changed = true;
+			break;
+		}
+	}
+
+	return (write_time_changed || calculate_digest() != digest());
+}
diff --git a/src/lib/content.h b/src/lib/content.h
index 550b3cd9c..d17b0d0e5 100644
--- a/src/lib/content.h
+++ b/src/lib/content.h
@@ -202,6 +202,9 @@ public:
 	std::shared_ptr<TextContent> only_text () const;
 	std::shared_ptr<TextContent> text_of_original_type (TextType type) const;
 
+	/** @return true if this content has changed since it was last examined */
+	bool changed () const;
+
 protected:
 
 	virtual void add_properties (std::shared_ptr<const Film> film, std::list<UserProperty> &) const;
-- 
2.30.2