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// Copyright (c) 2017, Matt Godbolt
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
class Handler {
constructor(fileSources, addStaticHeaders) {
this.allowedActions = new Set(['list', 'load', 'save']);
this.sourceToHandler = {};
fileSources.forEach(source => this.sourceToHandler[source.urlpart] = source);
this.addStaticHeaders = addStaticHeaders;
}
handlerForAction(handler, action) {
return this.allowedActions.has(action) ? handler[action] : null;
}
handle(req, res, next) {
const bits = req.url.split('/');
const handler = this.sourceToHandler[bits[1]];
if (!handler) {
next();
return;
}
const handlerAction = this.handlerForAction(handler, bits[2]);
if (!handlerAction) {
next();
return;
}
handlerAction.apply(handlerAction, bits.slice(3))
.then((response) => {
this.addStaticHeaders(res);
res.send(response);
})
.catch((err) => {
res.send({err: err});
});
}
}
module.exports.Handler = Handler;