Squashed 'www/git.causal.agency/cgit/' content from commit 02221fd3

git-subtree-dir: www/git.causal.agency/cgit
git-subtree-split: 02221fd3fe523a3293d64e3359036e3a71d6fd7e

1 files changed, 426 insertions, 0 deletions

diff --git a/ui-stats.c b/ui-stats.c
new file mode 100644
index 00000000..7272a61a
--- /dev/null
+++ b/ui-stats.c
@@ -0,0 +1,426 @@
+#include "cgit.h"
+#include "ui-stats.h"
+#include "html.h"
+#include "ui-shared.h"
+
+struct authorstat {
+	long total;
+	struct string_list list;
+};
+
+#define DAY_SECS (60 * 60 * 24)
+#define WEEK_SECS (DAY_SECS * 7)
+
+static void trunc_week(struct tm *tm)
+{
+	time_t t = timegm(tm);
+	t -= ((tm->tm_wday + 6) % 7) * DAY_SECS;
+	gmtime_r(&t, tm);
+}
+
+static void dec_week(struct tm *tm)
+{
+	time_t t = timegm(tm);
+	t -= WEEK_SECS;
+	gmtime_r(&t, tm);
+}
+
+static void inc_week(struct tm *tm)
+{
+	time_t t = timegm(tm);
+	t += WEEK_SECS;
+	gmtime_r(&t, tm);
+}
+
+static char *pretty_week(struct tm *tm)
+{
+	static char buf[10];
+
+	strftime(buf, sizeof(buf), "W%V %G", tm);
+	return buf;
+}
+
+static void trunc_month(struct tm *tm)
+{
+	tm->tm_mday = 1;
+}
+
+static void dec_month(struct tm *tm)
+{
+	tm->tm_mon--;
+	if (tm->tm_mon < 0) {
+		tm->tm_year--;
+		tm->tm_mon = 11;
+	}
+}
+
+static void inc_month(struct tm *tm)
+{
+	tm->tm_mon++;
+	if (tm->tm_mon > 11) {
+		tm->tm_year++;
+		tm->tm_mon = 0;
+	}
+}
+
+static char *pretty_month(struct tm *tm)
+{
+	static const char *months[] = {
+		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+	};
+	return fmt("%s %d", months[tm->tm_mon], tm->tm_year + 1900);
+}
+
+static void trunc_quarter(struct tm *tm)
+{
+	trunc_month(tm);
+	while (tm->tm_mon % 3 != 0)
+		dec_month(tm);
+}
+
+static void dec_quarter(struct tm *tm)
+{
+	dec_month(tm);
+	dec_month(tm);
+	dec_month(tm);
+}
+
+static void inc_quarter(struct tm *tm)
+{
+	inc_month(tm);
+	inc_month(tm);
+	inc_month(tm);
+}
+
+static char *pretty_quarter(struct tm *tm)
+{
+	return fmt("Q%d %d", tm->tm_mon / 3 + 1, tm->tm_year + 1900);
+}
+
+static void trunc_year(struct tm *tm)
+{
+	trunc_month(tm);
+	tm->tm_mon = 0;
+}
+
+static void dec_year(struct tm *tm)
+{
+	tm->tm_year--;
+}
+
+static void inc_year(struct tm *tm)
+{
+	tm->tm_year++;
+}
+
+static char *pretty_year(struct tm *tm)
+{
+	return fmt("%d", tm->tm_year + 1900);
+}
+
+static const struct cgit_period periods[] = {
+	{'w', "week", 12, 4, trunc_week, dec_week, inc_week, pretty_week},
+	{'m', "month", 12, 4, trunc_month, dec_month, inc_month, pretty_month},
+	{'q', "quarter", 12, 4, trunc_quarter, dec_quarter, inc_quarter, pretty_quarter},
+	{'y', "year", 12, 4, trunc_year, dec_year, inc_year, pretty_year},
+};
+
+/* Given a period code or name, return a period index (1, 2, 3 or 4)
+ * and update the period pointer to the correcsponding struct.
+ * If no matching code is found, return 0.
+ */
+int cgit_find_stats_period(const char *expr, const struct cgit_period **period)
+{
+	int i;
+	char code = '\0';
+
+	if (!expr)
+		return 0;
+
+	if (strlen(expr) == 1)
+		code = expr[0];
+
+	for (i = 0; i < sizeof(periods) / sizeof(periods[0]); i++)
+		if (periods[i].code == code || !strcmp(periods[i].name, expr)) {
+			if (period)
+				*period = &periods[i];
+			return i + 1;
+		}
+	return 0;
+}
+
+const char *cgit_find_stats_periodname(int idx)
+{
+	if (idx > 0 && idx < 4)
+		return periods[idx - 1].name;
+	else
+		return "";
+}
+
+static void add_commit(struct string_list *authors, struct commit *commit,
+	const struct cgit_period *period)
+{
+	struct commitinfo *info;
+	struct string_list_item *author, *item;
+	struct authorstat *authorstat;
+	struct string_list *items;
+	char *tmp;
+	struct tm *date;
+	time_t t;
+	uintptr_t *counter;
+
+	info = cgit_parse_commit(commit);
+	tmp = xstrdup(info->author);
+	author = string_list_insert(authors, tmp);
+	if (!author->util)
+		author->util = xcalloc(1, sizeof(struct authorstat));
+	else
+		free(tmp);
+	authorstat = author->util;
+	items = &authorstat->list;
+	t = info->committer_date;
+	date = gmtime(&t);
+	period->trunc(date);
+	tmp = xstrdup(period->pretty(date));
+	item = string_list_insert(items, tmp);
+	counter = (uintptr_t *)&item->util;
+	if (*counter)
+		free(tmp);
+	(*counter)++;
+
+	authorstat->total++;
+	cgit_free_commitinfo(info);
+}
+
+static int cmp_total_commits(const void *a1, const void *a2)
+{
+	const struct string_list_item *i1 = a1;
+	const struct string_list_item *i2 = a2;
+	const struct authorstat *auth1 = i1->util;
+	const struct authorstat *auth2 = i2->util;
+
+	return auth2->total - auth1->total;
+}
+
+/* Walk the commit DAG and collect number of commits per author per
+ * timeperiod into a nested string_list collection.
+ */
+static struct string_list collect_stats(const struct cgit_period *period)
+{
+	struct string_list authors;
+	struct rev_info rev;
+	struct commit *commit;
+	const char *argv[] = {NULL, ctx.qry.head, NULL, NULL, NULL, NULL};
+	int argc = 3;
+	time_t now;
+	long i;
+	struct tm *tm;
+	char tmp[11];
+
+	time(&now);
+	tm = gmtime(&now);
+	period->trunc(tm);
+	for (i = 1; i < period->count; i++)
+		period->dec(tm);
+	strftime(tmp, sizeof(tmp), "%Y-%m-%d", tm);
+	argv[2] = xstrdup(fmt("--since=%s", tmp));
+	if (ctx.qry.path) {
+		argv[3] = "--";
+		argv[4] = ctx.qry.path;
+		argc += 2;
+	}
+	init_revisions(&rev, NULL);
+	rev.abbrev = DEFAULT_ABBREV;
+	rev.commit_format = CMIT_FMT_DEFAULT;
+	rev.max_parents = 1;
+	rev.verbose_header = 1;
+	rev.show_root_diff = 0;
+	setup_revisions(argc, argv, &rev, NULL);
+	prepare_revision_walk(&rev);
+	memset(&authors, 0, sizeof(authors));
+	while ((commit = get_revision(&rev)) != NULL) {
+		add_commit(&authors, commit, period);
+		free_commit_buffer(the_repository->parsed_objects, commit);
+		free_commit_list(commit->parents);
+		commit->parents = NULL;
+	}
+	return authors;
+}
+
+static void print_combined_authorrow(struct string_list *authors, int from,
+				     int to, const char *name,
+				     const char *leftclass,
+				     const char *centerclass,
+				     const char *rightclass,
+				     const struct cgit_period *period)
+{
+	struct string_list_item *author;
+	struct authorstat *authorstat;
+	struct string_list *items;
+	struct string_list_item *date;
+	time_t now;
+	long i, j, total, subtotal;
+	struct tm *tm;
+	char *tmp;
+
+	time(&now);
+	tm = gmtime(&now);
+	period->trunc(tm);
+	for (i = 1; i < period->count; i++)
+		period->dec(tm);
+
+	total = 0;
+	htmlf("<tr><td class='%s'>%s</td>", leftclass,
+		fmt(name, to - from + 1));
+	for (j = 0; j < period->count; j++) {
+		tmp = period->pretty(tm);
+		period->inc(tm);
+		subtotal = 0;
+		for (i = from; i <= to; i++) {
+			author = &authors->items[i];
+			authorstat = author->util;
+			items = &authorstat->list;
+			date = string_list_lookup(items, tmp);
+			if (date)
+				subtotal += (uintptr_t)date->util;
+		}
+		htmlf("<td class='%s'>%ld</td>", centerclass, subtotal);
+		total += subtotal;
+	}
+	htmlf("<td class='%s'>%ld</td></tr>", rightclass, total);
+}
+
+static void print_authors(struct string_list *authors, int top,
+			  const struct cgit_period *period)
+{
+	struct string_list_item *author;
+	struct authorstat *authorstat;
+	struct string_list *items;
+	struct string_list_item *date;
+	time_t now;
+	long i, j, total;
+	struct tm *tm;
+	char *tmp;
+
+	time(&now);
+	tm = gmtime(&now);
+	period->trunc(tm);
+	for (i = 1; i < period->count; i++)
+		period->dec(tm);
+
+	html("<table class='stats'><tr><th>Author</th>");
+	for (j = 0; j < period->count; j++) {
+		tmp = period->pretty(tm);
+		htmlf("<th>%s</th>", tmp);
+		period->inc(tm);
+	}
+	html("<th>Total</th></tr>\n");
+
+	if (top <= 0 || top > authors->nr)
+		top = authors->nr;
+
+	for (i = 0; i < top; i++) {
+		author = &authors->items[i];
+		html("<tr><td class='left'>");
+		html_txt(author->string);
+		html("</td>");
+		authorstat = author->util;
+		items = &authorstat->list;
+		total = 0;
+		for (j = 0; j < period->count; j++)
+			period->dec(tm);
+		for (j = 0; j < period->count; j++) {
+			tmp = period->pretty(tm);
+			period->inc(tm);
+			date = string_list_lookup(items, tmp);
+			if (!date)
+				html("<td>0</td>");
+			else {
+				htmlf("<td>%lu</td>", (uintptr_t)date->util);
+				total += (uintptr_t)date->util;
+			}
+		}
+		htmlf("<td class='sum'>%ld</td></tr>", total);
+	}
+
+	if (top < authors->nr)
+		print_combined_authorrow(authors, top, authors->nr - 1,
+			"Others (%ld)", "left", "", "sum", period);
+
+	print_combined_authorrow(authors, 0, authors->nr - 1, "Total",
+		"total", "sum", "sum", period);
+	html("</table>");
+}
+
+/* Create a sorted string_list with one entry per author. The util-field
+ * for each author is another string_list which is used to calculate the
+ * number of commits per time-interval.
+ */
+void cgit_show_stats(void)
+{
+	struct string_list authors;
+	const struct cgit_period *period;
+	int top, i;
+	const char *code = "w";
+
+	if (ctx.qry.period)
+		code = ctx.qry.period;
+
+	i = cgit_find_stats_period(code, &period);
+	if (!i) {
+		cgit_print_error_page(404, "Not found",
+			"Unknown statistics type: %c", code[0]);
+		return;
+	}
+	if (i > ctx.repo->max_stats) {
+		cgit_print_error_page(400, "Bad request",
+			"Statistics type disabled: %s", period->name);
+		return;
+	}
+	authors = collect_stats(period);
+	qsort(authors.items, authors.nr, sizeof(struct string_list_item),
+		cmp_total_commits);
+
+	top = ctx.qry.ofs;
+	if (!top)
+		top = 10;
+
+	cgit_print_layout_start();
+	html("<div class='cgit-panel'>");
+	html("<b>stat options</b>");
+	html("<form method='get'>");
+	cgit_add_hidden_formfields(1, 0, "stats");
+	html("<table><tr><td colspan='2'/></tr>");
+	if (ctx.repo->max_stats > 1) {
+		html("<tr><td class='label'>Period:</td>");
+		html("<td class='ctrl'><select name='period' onchange='this.form.submit();'>");
+		for (i = 0; i < ctx.repo->max_stats; i++)
+			html_option(fmt("%c", periods[i].code),
+				    periods[i].name, fmt("%c", period->code));
+		html("</select></td></tr>");
+	}
+	html("<tr><td class='label'>Authors:</td>");
+	html("<td class='ctrl'><select name='ofs' onchange='this.form.submit();'>");
+	html_intoption(10, "10", top);
+	html_intoption(25, "25", top);
+	html_intoption(50, "50", top);
+	html_intoption(100, "100", top);
+	html_intoption(-1, "all", top);
+	html("</select></td></tr>");
+	html("<tr><td/><td class='ctrl'>");
+	html("<noscript><input type='submit' value='Reload'/></noscript>");
+	html("</td></tr></table>");
+	html("</form>");
+	html("</div>");
+	htmlf("<h2>Commits per author per %s", period->name);
+	if (ctx.qry.path) {
+		html(" (path '");
+		html_txt(ctx.qry.path);
+		html("')");
+	}
+	html("</h2>");
+	print_authors(&authors, top, period);
+	cgit_print_layout_end();
+}
+