Add cgit_print_age() function

This function can be used to print relative dates, just as in gitweb. Next
step will be to actually use the new function.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

5 files changed, 94 insertions, 8 deletions

diff --git a/cgit.css b/cgit.css
index 95c3e40..327eaba 100644
--- a/cgit.css
+++ b/cgit.css
@@ -390 +390,26 @@ table.list td.sublevel-repo {
 }
+
+span.age-mins {
+	font-weight: bold;
+	color: #080;
+}
+
+span.age-hours {
+	color: #080;
+}
+
+span.age-days {
+	color: #040;
+}
+
+span.age-weeks {
+	color: #444;
+}
+
+span.age-months {
+	color: #888;
+}
+
+span.age-years {
+	color: #bbb;
+}
diff --git a/cgit.h b/cgit.h
index 8927236..4da2d3d 100644
--- a/cgit.h
+++ b/cgit.h
@@ -31,2 +31,21 @@
 
+
+/*
+ * Dateformats used on misc. pages
+ */
+#define FMT_LONGDATE "%Y-%m-%d %H:%M:%S"
+#define FMT_SHORTDATE "%Y-%m-%d"
+
+
+/*
+ * Limits used for relative dates
+ */
+#define TM_MIN    60
+#define TM_HOUR  (TM_MIN * 60)
+#define TM_DAY   (TM_HOUR * 24)
+#define TM_WEEK  (TM_DAY * 7)
+#define TM_YEAR  (TM_DAY * 365)
+#define TM_MONTH (TM_YEAR / 12.0)
+
+
 typedef void (*configfn)(const char *name, const char *value);
@@ -183,3 +202,4 @@ extern char *cgit_pageurl(const char *reponame, const char *pagename,
 extern void cgit_print_error(char *msg);
-extern void cgit_print_date(unsigned long secs);
+extern void cgit_print_date(time_t secs, char *format);
+extern void cgit_print_age(time_t t, time_t max_relative, char *format);
 extern void cgit_print_docstart(char *title, struct cacheitem *item);
diff --git a/ui-commit.c b/ui-commit.c
index ff1fad3..59eeb1d 100644
--- a/ui-commit.c
+++ b/ui-commit.c
@@ -174,3 +174,3 @@ void cgit_print_commit(const char *hex)
 	html("</td><td class='right'>");
-	cgit_print_date(info->author_date);
+	cgit_print_date(info->author_date, FMT_LONGDATE);
 	html("</td></tr>\n");
@@ -181,3 +181,3 @@ void cgit_print_commit(const char *hex)
 	html("</td><td class='right'>");
-	cgit_print_date(info->committer_date);
+	cgit_print_date(info->committer_date, FMT_LONGDATE);
 	html("</td></tr>\n");
diff --git a/ui-shared.c b/ui-shared.c
index c7fbc5e..acc771b 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -90,5 +90,5 @@ char *cgit_currurl()
 
-void cgit_print_date(unsigned long secs)
+void cgit_print_date(time_t secs, char *format)
 {
-	char buf[32];
+	char buf[64];
 	struct tm *time;
@@ -96,3 +96,3 @@ void cgit_print_date(unsigned long secs)
 	time = gmtime(&secs);
-	strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", time);
+	strftime(buf, sizeof(buf)-1, format, time);
 	html_txt(buf);
@@ -100,2 +100,43 @@ void cgit_print_date(unsigned long secs)
 
+void cgit_print_age(time_t t, time_t max_relative, char *format)
+{
+	time_t now, secs;
+
+	time(&now);
+	secs = now - t;
+
+	if (secs > max_relative && max_relative >= 0) {
+		cgit_print_date(t, format);
+		return;
+	}
+
+	if (secs < TM_HOUR * 2) {
+		htmlf("<span class='age-mins'>%.0f min.</span>",
+		      secs * 1.0 / TM_MIN);
+		return;
+	}
+	if (secs < TM_DAY * 2) {
+		htmlf("<span class='age-hours'>%.0f hours</span>",
+		      secs * 1.0 / TM_HOUR);
+		return;
+	}
+	if (secs < TM_WEEK * 2) {
+		htmlf("<span class='age-days'>%.0f days</span>",
+		      secs * 1.0 / TM_DAY);
+		return;
+	}
+	if (secs < TM_MONTH * 2) {
+		htmlf("<span class='age-weeks'>%.0f weeks</span>",
+		      secs * 1.0 / TM_WEEK);
+		return;
+	}
+	if (secs < TM_YEAR * 2) {
+		htmlf("<span class='age-months'>%.0f months</span>",
+		      secs * 1.0 / TM_MONTH);
+		return;
+	}
+	htmlf("<span class='age-years'>%.0f years</span>",
+	      secs * 1.0 / TM_YEAR);
+}
+
 void cgit_print_docstart(char *title, struct cacheitem *item)
diff --git a/ui-summary.c b/ui-summary.c
index e7158cc..20394de 100644
--- a/ui-summary.c
+++ b/ui-summary.c
@@ -30,3 +30,3 @@ static int cgit_print_branch_cb(const char *refname, const unsigned char *sha1,
 		html("</td><td>");
-		cgit_print_date(commit->date);
+		cgit_print_date(commit->date, FMT_LONGDATE);
 		html("</td><td>");
@@ -110,3 +110,3 @@ static int cgit_print_tag_cb(const char *refname, const unsigned char *sha1,
 		if (info->tagger_date > 0)
-			cgit_print_date(info->tagger_date);
+			cgit_print_date(info->tagger_date, FMT_LONGDATE);
 		html("</td><td>");