1 files changed, 84 insertions, 0 deletions
diff --git a/lib/helper.php b/lib/helper.php
index 73b97e8..59c9622 100644
--- a/lib/helper.php
+++ b/lib/helper.php
@@ -187,3 +187,87 @@ function add_fancy_unit($value, $unit) {
   $exponent = max(0,min(count($suffixes)-1,round(log(abs($value))/log(1024)-1)));
   return sprintf("%.2f %s%s", $value / pow(1024,$exponent), $suffixes[8 + $exponent], $unit);
 }
+
+function parse_package_filename($filename, $repo = NULL) {
+  if (! preg_match(
+      '/^(\S+)-(([^-:]+):)?([^-:]+)-([^-]+)-([^-]+)\.pkg\.tar\.xz$/',
+      $filename,
+      $matches
+    ))
+    return;
+  $result = array(
+    'pkgname' => $matches[1],
+    'pkgver'  => $matches[4],
+    'pkgrel'  => $matches[5],
+    'arch'    => $matches[6]
+  );
+  if (!empty($repo))
+    $result['repo'] = $repo;
+  if (empty($matches[3]))
+    $result['epoch'] = '0';
+  else
+    $result['epoch'] = $matches[3];
+
+  return $result;
+}
+
+function find_upstream_packages_in($repo) {
+  $parse_package_filename_in_repo = function($filename) use ($repo) {
+    return parse_package_filename($filename, $repo);
+  };
+  return
+    array_map(
+      $parse_package_filename_in_repo,
+      explode(
+        "\n",
+        shell_exec(
+          "tar -Oxzf /var/lib/pacman/sync/" . $repo . ".db" .
+          " | grep -xFA1 '%FILENAME%'" .
+          " | grep -vxF '%FILENAME%\n--'"
+        )
+      )
+    );
+}
+
+function available_upstream_packages($columns = NULL) {
+  $available_upstream_packages = apcu_fetch('available_upstream_packages', $apcu_success);
+  if ($apcu_success == false) {
+    $available_upstream_packages_repowise = array_map(
+      'find_upstream_packages_in',
+      array(
+        'core', 'extra', 'community'
+      )
+    );
+    $available_upstream_packages = array();
+    foreach ($available_upstream_packages_repowise as $sub_array)
+      $available_upstream_packages =
+        array_merge(
+          $available_upstream_packages,
+          $sub_array
+        );
+    apcu_store('available_upstream_packages', $available_upstream_packages, 1800);
+  }
+
+  if (!isset($columns))
+    return $available_upstream_packages;
+  if (!is_array($columns))
+    return array_column($available_upstream_packages, $columns);
+  $select_columns_of_interest = function($row) use ($columns) {
+    $select = function($column) use ($row) {
+      return $row[$column];
+    };
+    return
+      array_combine(
+        $columns,
+        array_map(
+          $select,
+          $columns
+        )
+      );
+  };
+  return
+    array_map(
+      $select_columns_of_interest,
+      $available_upstream_packages
+    );
+}