Added form.js and updated changelog for release

CHANGELOG.md

@@ -5,7 +5,13 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+## 0.1.0 - 2019-08-15
+### Added
+- Added `form.js` to keep node type and num_cores in sync
 
 ## 0.0.1 - 2019-08-15
 ### Added
 - Initial release!
+
+[Unreleased]: https://github.com/OSC/bc_osc_stata/compare/v0.1.0...HEAD
+[0.1.0]: https://github.com/OSC/bc_osc_stata/compare/v0.0.1...v0.1.0

form.js

@@ -0,0 +1,61 @@
+'use strict'
+
+/**
+ * Fix num cores, allowing blanks to remain
+ */
+function fix_num_cores() {
+  let node_type_input = $('#batch_connect_session_context_node_type');
+  let node_type = node_type_input.val();
+  let num_cores_input = $('#num_cores');
+
+  if(num_cores_input.val() === '') {
+    return;
+  }
+
+  if(node_type === ':hugemem') {
+    set_ppn_owens_hugemem(num_cores_input);
+  } else {
+    set_ppn_owens_regular(num_cores_input);
+  }
+}
+
+/**
+ * Sets the PPN limits available for Owens hugemem nodes.
+ * 
+ * hugemem reservations are always assigned the full node
+ *
+ * @param      {element}  num_cores_input  The input for num_cores
+ */
+function set_ppn_owens_hugemem(num_cores_input) {
+  const NUM_CORES = 48;
+  num_cores_input.attr('max', NUM_CORES);
+  num_cores_input.attr('min', NUM_CORES);
+  num_cores_input.val(NUM_CORES);
+}
+
+/**
+ * Sets the PPN limits available for non hugemem Owens nodes.
+ *
+ * @param      {element}  num_cores_input  The input for num_cores
+ */
+function set_ppn_owens_regular(num_cores_input) {
+  const NUM_CORES = 28;
+  num_cores_input.attr('max', NUM_CORES);
+  num_cores_input.attr('min', 1);
+  num_cores_input.val(Math.min(NUM_CORES, num_cores_input.val()));
+}
+
+
+/**
+ * Change the maximum number of cores selected.
+ */
+function set_node_type_change_handler() {
+  let node_type_input = $('#batch_connect_session_context_node_type');
+  node_type_input.change(node_type_input, fix_num_cores);
+}
+
+$(document).ready(function() {
+  // Set the max value to be what was set in the last session
+  fix_num_cores();
+  set_node_type_change_handler();
+});