From 29d1a6de01c8ccbae6075f749f4a633770f5c7ad Mon Sep 17 00:00:00 2001
From: rsiddharth <s@ricketyspace.net>
Date: Sat, 21 Sep 2019 11:59:24 -0400
Subject: nfsw/static: Add io.js.

---
 nfsw/static/io.js | 146 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 nfsw/static/io.js

diff --git a/nfsw/static/io.js b/nfsw/static/io.js
new file mode 100644
index 0000000..b3c3b84
--- /dev/null
+++ b/nfsw/static/io.js
@@ -0,0 +1,146 @@
+document.addEventListener('DOMContentLoaded', () => {
+    /**
+     * Handling for sending commands to server.
+     */
+    window.qip = false;  // query in prograss flag.
+    function query(q) {
+        if (window.qip) {
+            return window.setTimeout(query, 10, q)
+        }
+        window.qip = true;
+
+        var qipoff = function() {
+            window.qip = false;
+        }
+        var spit = function(response) {
+            var gdg = 'Oops! getting gobbledygook from server';
+
+            var r;
+            try {
+                r = JSON.parse(response)
+            } catch (e) {
+                return barfslow(gdg, 'error', qipoff);
+            }
+
+            if (!(typeof r === 'object')) {
+                return barf(gdg);
+            }
+
+            if (!('ans' in r)) {
+                return barfslow(
+                    'No answer from server!',
+                    'error',
+                    qipoff
+                )
+            }
+
+            return barfslow(r.ans, 'concierge', qipoff)
+        }
+
+        var xhr = new XMLHttpRequest()
+        xhr.open('POST', '/io/query', true)
+
+        xhr.onreadystatechange = function() {
+            if (this.readyState != 4) {
+                return;
+            }
+
+            if (this.status == 200) {
+                return spit(this.responseText)
+            } else {
+                return barfslow(
+                    'Unable send command to server!', 'error', qipoff
+                )
+            }
+        }
+        xhr.send(q)
+    }
+
+    /**
+     * Handling for console.
+     */
+    function barf(txt, type, p) {
+        if (txt.length < 1) {
+            return ''
+        }
+        barfblank()
+
+        p = document.createElement('p')
+        p.className = type
+
+        p.append(txt)
+
+        ioconsole.appendChild(p)
+
+        return ''
+    }
+    function barfblank() {
+        p = document.createElement('p')
+        p.className = 'blank'
+
+        p.innerHTML = '<br />'
+
+        ioconsole.appendChild(p)
+    }
+    function barfslow(txt, type, cb, p) {
+        if (txt.length < 1) {
+            if (cb)
+                cb()
+
+            return ''
+        }
+
+        nl = false
+        if (txt.charAt(0) == '\n')
+            nl = true
+
+        if (!p)
+            barfblank()
+        if (!p || nl) {
+            p = document.createElement('p')
+            p.className = type
+
+            ioconsole.appendChild(p)
+        }
+        p.append(txt.substring(0, 1))
+        p.scrollIntoView();
+
+        window.setTimeout(
+            barfslow, 0,
+            txt.substring(1, txt.length),
+            type,
+            cb,
+            p
+        )
+
+        return ''
+    }
+    var ioconsole = document.getElementsByClassName('console')[0]
+
+
+    /**
+     * Handling for the prompt.
+     */
+    function submit(e) {
+        e.preventDefault()
+
+        var input = e.target.querySelector('input')
+
+        var cmd = input.value
+        if (cmd.length < 1)
+            return
+
+        /**
+         * Reset prompt.
+         */
+        input.value = ''
+
+        /**
+         * Send command to server.
+         */
+        query(cmd)
+    }
+    var form = document.querySelector('form')
+    form.onsubmit = submit
+
+});
-- 
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