added queue.js to simplify jarvis

1 files changed, 24 insertions, 0 deletions

diff --git a/tools/queue.js b/tools/queue.js
new file mode 100644
index 0000000..ebe17cd
--- /dev/null
+++ b/tools/queue.js
@@ -0,0 +1,24 @@
+// A generalized queue object for rapid responses (doesn't do prioritization or algorithmic timesharing)
+
+module.exports = function(delayms, maxExport, call){
+  let queue = [];
+  let open = true;
+  let getObjs = (maxExport == 1) ?
+    () => queue.shift() :
+    () => queue.splice(0, maxExport) ;
+  this.enqueue = function(){
+    for (let i = 0; i < arguments.length; i++)
+      queue.push(arguments[i]);
+    if (open) dequeue();
+  }
+
+  function dequeue(){
+    if (queue.length == 0)
+      open = true;
+    else {
+      open = false;
+      call(getObjs());
+      setTimeout(dequeue, delayms);
+    }
+  }
+}