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diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -342,6 +342,7 @@
'function' =>
array(
'Futures' => 'future/functions.php',
+ '_phutil_date_format' => 'utils/viewutils.php',
'_qsprintf_check_scalar_type' => 'xsprintf/qsprintf.php',
'_qsprintf_check_type' => 'xsprintf/qsprintf.php',
'array_fuse' => 'utils/utils.php',
@@ -390,6 +391,10 @@
'phutil_escape_uri' => 'markup/render.php',
'phutil_escape_uri_path_component' => 'markup/render.php',
'phutil_exit' => 'utils/utils.php',
+ 'phutil_format_bytes' => 'utils/viewutils.php',
+ 'phutil_format_relative_time' => 'utils/viewutils.php',
+ 'phutil_format_relative_time_detailed' => 'utils/viewutils.php',
+ 'phutil_format_units_generic' => 'utils/viewutils.php',
'phutil_fwrite_nonblocking_stream' => 'utils/utils.php',
'phutil_get_current_library_name' => 'moduleutils/moduleutils.php',
'phutil_get_library_name_for_root' => 'moduleutils/moduleutils.php',
@@ -405,6 +410,7 @@
'phutil_json_decode' => 'utils/utils.php',
'phutil_load_library' => 'moduleutils/core.php',
'phutil_loggable_string' => 'utils/utils.php',
+ 'phutil_parse_bytes' => 'utils/viewutils.php',
'phutil_passthru' => 'future/exec/execx.php',
'phutil_register_library' => 'moduleutils/core.php',
'phutil_register_library_map' => 'moduleutils/core.php',
diff --git a/src/utils/viewutils.php b/src/utils/viewutils.php
new file mode 100644
--- /dev/null
+++ b/src/utils/viewutils.php
@@ -0,0 +1,171 @@
+<?php
+
+function _phutil_date_format($epoch) {
+ $now = time();
+ $shift = 30 * 24 * 60 * 60;
+ if ($epoch < $now + $shift && $epoch > $now - $shift) {
+ $format = pht('D, M j');
+ } else {
+ $format = pht('M j Y');
+ }
+ return $format;
+}
+
+function phutil_format_relative_time($duration) {
+ return phutil_format_units_generic(
+ $duration,
+ array(60, 60, 24, 7),
+ array('s', 'm', 'h', 'd', 'w'),
+ $precision = 0);
+}
+
+/**
+ * Format a relative time (duration) into weeks, days, hours, minutes,
+ * seconds, but unlike phabricator_format_relative_time, does so for more than
+ * just the largest unit.
+ *
+ * @param int Duration in seconds.
+ * @param int Levels to render - will render the three highest levels, ie:
+ * 5 h, 37 m, 1 s
+ * @return string Human-readable description.
+ */
+function phutil_format_relative_time_detailed($duration, $levels = 2) {
+ if ($duration == 0) {
+ return 'now';
+ }
+ $levels = max(1, min($levels, 5));
+ $remainder = 0;
+
+ $is_negative = false;
+ if ($duration < 0) {
+ $is_negative = true;
+ $duration = abs($duration);
+ }
+
+ $this_level = 1;
+ $detailed_relative_time = phutil_format_units_generic(
+ $duration,
+ array(60, 60, 24, 7),
+ array('s', 'm', 'h', 'd', 'w'),
+ $precision = 0,
+ $remainder);
+ $duration = $remainder;
+
+ while ($remainder > 0 && $this_level < $levels) {
+ $detailed_relative_time .= ', '.phutil_format_units_generic(
+ $duration,
+ array(60, 60, 24, 7),
+ array('s', 'm', 'h', 'd', 'w'),
+ $precision = 0,
+ $remainder);
+ $duration = $remainder;
+ $this_level++;
+ };
+
+ if ($is_negative) {
+ $detailed_relative_time .= ' ago';
+ }
+
+ return $detailed_relative_time;
+}
+
+/**
+ * Format a byte count for human consumption, e.g. "10MB" instead of
+ * "10000000".
+ *
+ * @param int Number of bytes.
+ * @return string Human-readable description.
+ */
+function phutil_format_bytes($bytes) {
+ return phutil_format_units_generic(
+ $bytes,
+ // NOTE: Using the SI version of these units rather than the 1024 version.
+ array(1000, 1000, 1000, 1000, 1000),
+ array('B', 'KB', 'MB', 'GB', 'TB', 'PB'),
+ $precision = 0);
+}
+
+
+/**
+ * Parse a human-readable byte description (like "6MB") into an integer.
+ *
+ * @param string Human-readable description.
+ * @return int Number of represented bytes.
+ */
+function phutil_parse_bytes($input) {
+ $bytes = trim($input);
+ if (!strlen($bytes)) {
+ return null;
+ }
+
+ // NOTE: Assumes US-centric numeral notation.
+ $bytes = preg_replace('/[ ,]/', '', $bytes);
+
+ $matches = null;
+ if (!preg_match('/^(?:\d+(?:[.]\d+)?)([kmgtp]?)b?$/i', $bytes, $matches)) {
+ throw new Exception("Unable to parse byte size '{$input}'!");
+ }
+
+ $scale = array(
+ 'k' => 1000,
+ 'm' => 1000 * 1000,
+ 'g' => 1000 * 1000 * 1000,
+ 't' => 1000 * 1000 * 1000 * 1000,
+ 'p' => 1000 * 1000 * 1000 * 1000 * 1000,
+ );
+
+ $bytes = (float)$bytes;
+ if ($matches[1]) {
+ $bytes *= $scale[strtolower($matches[1])];
+ }
+
+ return (int)$bytes;
+}
+
+
+function phutil_format_units_generic(
+ $n,
+ array $scales,
+ array $labels,
+ $precision = 0,
+ &$remainder = null) {
+
+ $is_negative = false;
+ if ($n < 0) {
+ $is_negative = true;
+ $n = abs($n);
+ }
+
+ $remainder = 0;
+ $accum = 1;
+
+ $scale = array_shift($scales);
+ $label = array_shift($labels);
+ while ($n >= $scale && count($labels)) {
+ $remainder += ($n % $scale) * $accum;
+ $n /= $scale;
+ $accum *= $scale;
+ $label = array_shift($labels);
+ if (!count($scales)) {
+ break;
+ }
+ $scale = array_shift($scales);
+ }
+
+ if ($is_negative) {
+ $n = -$n;
+ $remainder = -$remainder;
+ }
+
+ if ($precision) {
+ $num_string = number_format($n, $precision);
+ } else {
+ $num_string = (int)floor($n);
+ }
+
+ if ($label) {
+ $num_string .= ' '.$label;
+ }
+
+ return $num_string;
+}

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