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shrine-medco/shrine-webclient/src/main/html/node_modules/negotiator/lib/encoding.js
23de2099ce18release/1.22.2.4

encoding.js
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			module.exports = preferredEncodings;
			preferredEncodings.preferredEncodings = preferredEncodings;

			function parseAcceptEncoding(accept) {
			var acceptableEncodings;

			if (accept) {
			acceptableEncodings = accept.split(',').map(function(e) {
			return parseEncoding(e.trim());
			});
			} else {
			acceptableEncodings = [];
			}

			if (!acceptableEncodings.some(function(e) {
			return e && specify('identity', e);
			})) {
			/*
			* If identity doesn't explicitly appear in the accept-encoding header,
			* it's added to the list of acceptable encoding with the lowest q
			*
			*/
			var lowestQ = 1;

			for(var i = 0; i < acceptableEncodings.length; i++){
			var e = acceptableEncodings[i];
			if(e && e.q < lowestQ){
			lowestQ = e.q;
			}
			}
			acceptableEncodings.push({
			encoding: 'identity',
			q: lowestQ / 2,
			});
			}

			return acceptableEncodings.filter(function(e) {
			return e;
			});
			}

			function parseEncoding(s) {
			var match = s.match(/^\s(\S+?)\s(?:;(.*))?$/);

			if (!match) return null;

			var encoding = match[1];
			var q = 1;
			if (match[2]) {
			var params = match[2].split(';');
			for (var i = 0; i < params.length; i ++) {
			var p = params[i].trim().split('=');
			if (p[0] === 'q') {
			q = parseFloat(p[1]);
			break;
			}
			}
			}

			return {
			encoding: encoding,
			q: q
			};
			}

			function getEncodingPriority(encoding, accepted) {
			return (accepted.map(function(a) {
			return specify(encoding, a);
			}).filter(Boolean).sort(function (a, b) {
			if(a.s == b.s) {
			return a.q > b.q ? -1 : 1;
			} else {
			return a.s > b.s ? -1 : 1;
			}
			})[0] \|\| {s: 0, q: 0});
			}

			function specify(encoding, spec) {
			var s = 0;
			if(spec.encoding === encoding){
			s \|= 1;
			} else if (spec.encoding !== '*' ) {
			return null
			}

			return {
			s: s,
			q: spec.q,
			}
			};

			function preferredEncodings(accept, provided) {
			accept = parseAcceptEncoding(accept \|\| '');
			if (provided) {
			return provided.map(function(type) {
			return [type, getEncodingPriority(type, accept)];
			}).filter(function(pair) {
			return pair[1].q > 0;
			}).sort(function(a, b) {
			var pa = a[1];
			var pb = b[1];
			if(pa.q == pb.q) {
			return pa.s < pb.s ? 1 : -1;
			} else {
			return pa.q < pb.q ? 1 : -1;
			}
			}).map(function(pair) {
			return pair[0];
			});
			} else {
			return accept.sort(function (a, b) {
			// revsort
			return a.q < b.q ? 1 : -1;
			}).filter(function(type){
			return type.q > 0;
			}).map(function(type) {
			return type.encoding;
			});
			}
			}