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/**
Operations for working with jCal.
jCal is defined in RFC 7265, and is a JSON mapping of the iCalendar standard.
*/
export { jcal_to_xcal }
import { xcal, ical_type, JCalProperty, JCal } from './types'
import { asList } from './lib'
/**
* A document with the xcal namespace, and @code{icalendar} as its root
* element. Each child is a valid xcal representation of our JCal object.
*/
function jcal_type_to_xcal(doc: Document, type: ical_type, value: any): Element {
let el = doc.createElementNS(xcal, type);
switch (type) {
case 'boolean':
el.textContent = value ? "true" : "false";
break;
case 'float':
case 'integer':
el.textContent = '' + value;
break;
case 'period':
let [start, end] = value;
let startEl = doc.createElementNS(xcal, 'start');
startEl.textContent = start;
let endEl: Element;
if (end.find('P')) {
endEl = doc.createElementNS(xcal, 'duration');
} else {
endEl = doc.createElementNS(xcal, 'end');
}
endEl.textContent = end;
el.appendChild(startEl);
el.appendChild(endEl);
break;
case 'recur':
for (var key in value) {
if (!value.hasOwnProperty(key)) continue;
if (key === 'byday') {
for (let v of value[key]) {
let e = doc.createElementNS(xcal, key);
e.textContent = v;
el.appendChild(e);
}
} else {
let e = doc.createElementNS(xcal, key);
e.textContent = value[key];
el.appendChild(e);
}
}
break;
case 'date':
// case 'time':
case 'date-time':
case 'duration':
case 'binary':
case 'text':
case 'uri':
case 'cal-address':
case 'utc-offset':
el.textContent = value;
break;
default:
/* TODO error */
}
return el;
}
function jcal_property_to_xcal_property(
doc: Document,
jcal: JCalProperty
): Element {
let [propertyName, params, type, ...values] = jcal;
let tag = doc.createElementNS(xcal, propertyName);
/* setup parameters */
let paramEl = doc.createElementNS(xcal, 'params');
for (var key in params) {
/* Check if the key actually belongs to us.
At least (my) format also appears when iterating
over the parameters. Probably a case of builtins
vs user defined.
This is also the reason we can't check if params
is empty beforehand, and instead check the
number of children of paramEl below.
*/
if (!params.hasOwnProperty(key)) continue;
let el = doc.createElementNS(xcal, key);
for (let v of asList(params.get(key))) {
let text = doc.createElementNS(xcal, 'text');
text.textContent = '' + v;
el.appendChild(text);
}
paramEl.appendChild(el);
}
if (paramEl.childElementCount > 0) {
tag.appendChild(paramEl);
}
/* setup value (and type) */
// 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.textContent = x;
lon.textContent = y;
tag.appendChild(lat);
tag.appendChild(lon);
} else {
/* TODO, error */
}
break;
/* TODO reenable this
case 'request-status':
if (type == 'text') {
// assert values[0] instanceof Array
let [code, desc, ...data] = values[0];
let codeEl = doc.createElementNS(xcal, 'code')
code.textContent = code;
tag.appendChild(codeEl);
let descEl = doc.createElementNS(xcal, 'description')
desc.textContent = desc;
tag.appendChild(descEl);
if (data !== []) {
data = data[0];
let dataEl = doc.createElementNS(xcal, 'data')
data.textContent = 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;
}
/**
Convert a jCal document into an xCal document.
@param jcals A list of jcal components. Most iCal formats supports multiple
"root" levels components. jCal might do it, which is why this parameter is
multi-valued.
@return A document note which is the root of an xCal document.
The root will be an icalendar tag, with each child getting its data from each
element of the input.
*/
function jcal_to_xcal(...jcals: JCal[]): Document {
let doc = document.implementation.createDocument(xcal, 'icalendar');
for (let jcal of jcals) {
doc.documentElement.appendChild(jcal_to_xcal_inner(doc, jcal));
}
return doc;
}
/**
Convert a single jCal entry into a single xCal entry.
@param doc
A Document element in the xcal namespace.
@param jcal
The object to convert
@return
A 1-to-1 mapping of the jCal object as xCal.
*/
function jcal_to_xcal_inner(doc: Document, jcal: 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(doc, 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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