From 4cf9587a5188e5853bbcf97b71109e7cb9331d9f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hugo=20H=C3=B6rnquist?= <hugo@lysator.liu.se>
Date: Sun, 3 Oct 2021 21:54:30 +0200
Subject: work

---
 static/vevent.js | 214 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 214 insertions(+)
 create mode 100644 static/vevent.js

(limited to 'static/vevent.js')

diff --git a/static/vevent.js b/static/vevent.js
new file mode 100644
index 00000000..678f2134
--- /dev/null
+++ b/static/vevent.js
@@ -0,0 +1,214 @@
+"use strict";
+
+class VEventValue {
+    constructor (type, value, parameters = {}) {
+        this.type = type;
+        this.value = value;
+        this.parameters = parameters;
+    }
+
+    to_jcal () {
+        let value;
+        let v = this.value;
+        switch (this.type) {
+        case 'binary':
+            /* TOOD */
+            break;
+        case 'date-time':
+            value = v.format("~Y-~m-~dT~H:~M:~S");
+            // TODO TZ
+            break;
+        case 'date':
+            value = v.format("~Y-~m-~d");
+            break;
+        case 'duration':
+            /* TODO */
+            break;
+        case 'period':
+            /* TODO */
+            break;
+        case 'utc-offset':
+            /* TODO */
+            break;
+        case 'recur':
+            value = v.asJcal();
+            break;
+
+        case 'float':
+        case 'integer':
+        case 'text':
+        case 'uri':
+        case 'cal-address':
+        case 'boolean':
+            value = v;
+        }
+        return [this.parameters, this.type, value];
+    }
+}
+
+/* maybe ... */
+class VEventDuration extends VEventValue {
+}
+
+class VEvent {
+    constructor (properties = {}, components = []) {
+        this.properties = properties;
+        this.components = components;
+        this.registered = [];
+    }
+
+    getProperty (key) {
+        let e = this.properties[key];
+        if (! e) return e;
+        return e.value;
+    }
+
+    setProperty (key, value) {
+        let e = this.properties[key];
+        if (! e) {
+            let type = (valid_input_types[key.toUpperCase()] || ['unknown'])[0]
+            if (typeof type === typeof []) type = type[0];
+            e = this.properties[key] = new VEventValue(type, value);
+        } else {
+            e.value = value;
+        }
+        for (let el of this.registered) {
+            /* TODO update correct fields, allow component to redraw themselves */
+            console.log(el);
+            el.redraw(this);
+        }
+    }
+
+    register (htmlNode) {
+        this.registered.push(htmlNode);
+    }
+
+    to_jcal () {
+        let out_properties = []
+        for (let [key, value] of Object.entries(this.properties)) {
+            let sub = value.to_jcal();
+            sub.unshift(key)
+            out_properties.push(sub);
+        }
+        return ['vevent', out_properties, [/* alarms go here*/]]
+    }
+}
+
+function make_vevent_value (value_tag) {
+    /* TODO parameters */
+    return new VEventValue (value_tag.tagName, make_vevent_value_ (value_tag));
+}
+
+function make_vevent_value_ (value_tag) {
+    /* RFC6321 3.6. */
+    switch (value_tag.tagName) {
+    case 'binary':
+        /* Base64 to binary
+           Seems to handle inline whitespace, which xCal standard reqires
+           */
+        return atob(value_tag.innerHTML)
+        break;
+
+    case 'boolean':
+        switch (value_tag.innerHTML) {
+        case 'true':  return true;
+        case 'false': return false;
+        default:
+            console.warn(`Bad boolean ${value_tag.innerHTML}, defaulting with !!`)
+            return !! value_tag.innerHTML;
+        }
+        break;
+
+    case 'time':
+    case 'date':
+    case 'date-time':
+        return parseDate(value_tag.innerHTML);
+        break;
+
+    case 'duration':
+        /* TODO duration parser here 'P1D' */
+        return value_tag.innerHTML;
+        break;
+
+    case 'float':
+    case 'integer':
+        return +value_tag.innerHTML;
+        break;
+
+    case 'period':
+        /* TODO has sub components, meaning that a string wont do */
+        let start = value_tag.getElementsByTagName('start')[0]
+        parseDate(start.innerHTML);
+        let other;
+        if ((other = value_tag.getElementsByTagName('end')[0])) {
+            return parseDate(other.innerHTML)
+        } else if ((other = value_tag.getElementsByTagName('duration')[0])) {
+            /* TODO parse duration */
+            return other.innerHTML
+        } else {
+            console.warn('Invalid end to period, defaulting to 1H');
+            return new Date(3600);
+        }
+
+    case 'recur':
+        /* TODO parse */
+        return "";
+
+    case 'utc-offset':
+        /* TODO parse */
+        return "";
+
+    default:
+        console.warn(`Unknown type '${value_tag.tagName}', defaulting to string`)
+    case 'cal-address':
+    case 'uri':
+    case 'text':
+        return value_tag.innerHTML;
+    }
+}
+
+/* xml dom object -> class VEvent */
+function xml_to_vcal (xml) {
+    /* xml MUST have a VEVENT (or equivalent) as its root */
+    let properties = xml.getElementsByTagName('properties')[0];
+    let components = xml.getElementsByTagName('components')[0];
+
+    let property_map = {}
+    if (properties) {
+        for (var i = 0; i < properties.childElementCount; i++) {
+            let tag = properties.childNodes[i];
+            let parameters = {};
+            let value = [];
+            for (var j = 0; j < tag.childElementCount; j++) {
+                let child = tag.childNodes[j];
+                switch (tag.tagName) {
+                case 'parameters':
+                    parameters = /* handle parameters */ {};
+                    break;
+
+                    /* These can contain multiple value tags, per
+                       RFC6321 3.4.1.1. */
+                case 'categories':
+                case 'resources':
+                case 'freebusy':
+                case 'exdate':
+                case 'rdate':
+                    value.push(make_vevent_value(child));
+                    break;
+                default:
+                    value = make_vevent_value(child);
+                }
+            }
+            property_map[tag.tagName] = value;
+        }
+    }
+
+    let component_list = []
+    if (components) {
+        for (let child of components.childNodes) {
+            component_list.push(xml_to_vcal(child))
+        }
+    }
+
+    return new VEvent(property_map, component_list)
+}
-- 
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