From 0e1eb02c1a6d596bd1e620b9c9bb13e6c125f5cb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hugo=20H=C3=B6rnquist?= <hugo@lysator.liu.se>
Date: Fri, 18 Dec 2020 23:18:47 +0100
Subject: Start work on jcal system.

---
 static/jcal.js | 156 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100644 static/jcal.js

(limited to 'static/jcal.js')

diff --git a/static/jcal.js b/static/jcal.js
new file mode 100644
index 00000000..ebf80cbd
--- /dev/null
+++ b/static/jcal.js
@@ -0,0 +1,156 @@
+function jcal_type_to_xcal(doc, type, value) {
+    let el = doc.createElementNS(xcal, type);
+    switch (type) {
+    case 'boolean':
+        el.innerHTML = value ? "true" : "false";
+        break;
+
+    case 'float':
+    case 'integer':
+        el.innerHTML = '' + value;
+        break;
+
+    case 'period':
+        let [start, end] = value;
+        let startEl = doc.createElementNS(xcal, 'start');
+        startEl.innerHTML = start;
+        let endEL;
+        if (end.find('P')) {
+            endEl = doc.createElementNS(xcal, 'duration');
+        } else {
+            endEl = doc.createElementNS(xcal, 'end');
+        }
+        endEl.innerHTML = end;
+        el.appendChild(startEl);
+        el.appendChild(endEl);
+        break;
+
+    case 'recur':
+        el.appendChild(recur_jcal_to_rrule(value).asXcal(doc));
+        break;
+
+    case 'date':
+    case 'time':
+    case 'date-time':
+
+    case 'duration':
+
+    case 'binary':
+    case 'text':
+    case 'uri':
+    case 'cal-address':
+    case 'utc-offset':
+        el.innerHTML = value;
+        break;
+
+    default:
+        /* TODO error */
+    }
+    return el;
+}
+
+function jcal_property_to_xcal_property(doc, jcal) {
+    let [propertyName, params, type, ...values] = jcal;
+
+    let tag = doc.createElementNS(xcal, propertyName);
+
+    if (params !== {}) {
+        let params = doc.createElementNS(xcal, params);
+        for (var key in params) {
+            let el = doc.createElementNS(xcal, key);
+
+            for (let v of asList(params[key])) {
+                let text = doc.createElementNS(xcal, 'text');
+                text.innerHTML = '' + v;
+                el.appendChild(text);
+            }
+
+            params.appendChild(el);
+        }
+
+        tag.appendChild(params);
+    }
+
+    // let typeEl = doc.createElementNS(xcal, type);
+
+    switch (propertyName) {
+    case 'geo':
+        if (type == 'float') {
+            // assert values[0] == [x, y]
+            let [x, y] = values[0];
+            let lat = doc.createElementNS(xcal, 'latitude')
+            let lon = doc.createElementNS(xcal, 'longitude')
+            lat.innerHTML = x;
+            lon.innerHTML = y;
+            tag.appendChild(lat);
+            tag.appendChild(lon);
+        } else {
+            /* TODO, error */
+        }
+        break;
+    case 'request-status':
+        if (type == 'text') {
+            // assert values[0] instanceof Array
+            let [code, desc, ...data] = values[0];
+            let codeEl = doc.createElementNS(xcal, 'code')
+            code.innerHTML = code;
+            tag.appendChild(codeEl);
+
+
+            let descEl = doc.createElementNS(xcal, 'description')
+            desc.innerHTML = desc;
+            tag.appendChild(descEl);
+
+            if (data !== []) {
+                data = data[0];
+                let dataEl = doc.createElementNS(xcal, 'data')
+                data.innerHTML = data;
+                tag.appendChild(dataEl);
+            }
+        } else {
+            /* TODO, error */
+        }
+        break;
+    default:
+        for (let value of values) {
+            tag.appendChild(jcal_type_to_xcal(doc, type, value))
+        }
+    }
+
+    return tag;
+}
+
+
+function jcal_to_xcal(...jcals) {
+    let doc = document.implementation.createDocument(xcal, 'icalendar');
+    for (let jcal of jcals) {
+        doc.documentElement.appendChild(jcal_to_xcal_inner(doc, jcal));
+    }
+    return doc;
+}
+
+function jcal_to_xcal_inner(doc, jcal) {
+    let [tagname, properties, components] = jcal;
+
+    let xcal_tag = doc.createElementNS(xcal, tagname);
+
+    /* I'm not sure if the properties and components tag should be left out
+       when empty. It should however NOT be an error to leave them in.
+    */
+
+    let xcal_properties = doc.createElementNS(xcal, 'properties');
+    for (let property of properties) {
+        xcal_properties.appendChild(jcal_property_to_xcal_property(property));
+    }
+
+    let xcal_children = doc.createElementNS(xcal, 'components');
+    for (let child of components) {
+        xcal_children.appendChild(jcal_to_xcal_inner(doc, child));
+    }
+
+    xcal_tag.appendChild(xcal_properties);
+    xcal_tag.appendChild(xcal_children);
+
+    return xcal_tag;
+
+}
-- 
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