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import camelize from './camelize';
let debug = require('./debug')('dav:parser');
let DOMParser;
if (typeof self !== 'undefined' && 'DOMParser' in self) {
// browser main thread
DOMParser = self.DOMParser;
} else {
// nodejs or web worker
DOMParser = require('xmldom').DOMParser;
}
export function multistatus(string) {
let parser = new DOMParser();
let doc = parser.parseFromString(string, 'text/xml');
let result = traverse.multistatus(child(doc, 'multistatus'));
debug(`input:\n${string}\noutput:\n${JSON.stringify(result)}\n`);
return result;
}
let traverse = {
// { response: [x, y, z] }
multistatus: node => complex(node, { response: true }),
// { propstat: [x, y, z] }
response: node => complex(node, { propstat: true, href: false }),
// { prop: x }
propstat: node => complex(node, { prop: false }),
// {
// resourcetype: x
// supportedCalendarComponentSet: y,
// supportedReportSet: z
// }
prop: node => {
return complex(node, {
resourcetype: false,
supportedCalendarComponentSet: false,
supportedReportSet: false,
currentUserPrincipal: false
});
},
resourcetype: node => {
return childNodes(node).map(childNode => childNode.localName);
},
// [x, y, z]
supportedCalendarComponentSet: node => complex(node, { comp: true }, 'comp'),
// [x, y, z]
supportedReportSet: node => {
return complex(node, { supportedReport: true }, 'supportedReport');
},
comp: node => node.getAttribute('name'),
// x
supportedReport: node => complex(node, { report: false }, 'report'),
report: node => {
return childNodes(node).map(childNode => childNode.localName);
},
href: node => {
return decodeURIComponent(childNodes(node)[0].nodeValue);
},
currentUserPrincipal: node => {
return complex(node, {href: false}, 'href');
}
};
function complex(node, childspec, collapse) {
let result = {};
for (let key in childspec) {
if (childspec[key]) {
// Create array since we're expecting multiple.
result[key] = [];
}
}
childNodes(node).forEach(
childNode => traverseChild(node, childNode, childspec, result)
);
return maybeCollapse(result, childspec, collapse);
}
/**
* Parse child childNode of node with childspec and write outcome to result.
*/
function traverseChild(node, childNode, childspec, result) {
if (childNode.nodeType === 3 && /^\s+$/.test(childNode.nodeValue)) {
// Whitespace... nothing to do.
return;
}
let localName = camelize(childNode.localName, '-');
if (!(localName in childspec)) {
debug('Unexpected node of type ' + localName + ' encountered while ' +
'parsing ' + node.localName + ' node!');
let value = childNode.textContent;
if (localName in result) {
if (!Array.isArray(result[camelCase])) {
// Since we've already encountered this node type and we haven't yet
// made an array for it, make an array now.
result[localName] = [result[localName]];
}
result[localName].push(value);
return;
}
// First time we're encountering this node.
result[localName] = value;
return;
}
let traversal = traverse[localName](childNode);
if (childspec[localName]) {
// Expect multiple.
result[localName].push(traversal);
} else {
// Expect single.
result[localName] = traversal;
}
}
function maybeCollapse(result, childspec, collapse) {
if (!collapse) {
return result;
}
if (!childspec[collapse]) {
return result[collapse];
}
// Collapse array.
return result[collapse].reduce((a, b) => a.concat(b), []);
}
function childNodes(node) {
let result = node.childNodes;
if (!Array.isArray(result)) {
result = Array.prototype.slice.call(result);
}
return result;
}
function children(node, localName) {
return childNodes(node).filter(childNode => childNode.localName === localName);
}
function child(node, localName) {
return children(node, localName)[0];
}
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