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// Copyright (c) 2012-2017, 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.
const fs = require('fs'),
logger = require('./logger').logger,
_ = require('underscore-node'),
path = require('path');
let properties = {};
let hierarchy = [];
let propDebug = false;
function findProps(base, elem) {
const name = base + '.' + elem;
return properties[name];
}
function debug(string) {
if (propDebug) logger.info(`prop: ${string}`);
}
function get(base, property, defaultValue) {
let result = defaultValue;
let source = 'default';
hierarchy.forEach(elem => {
const propertyMap = findProps(base, elem);
if (propertyMap && property in propertyMap) {
debug(`${base}.${property}: overriding ${source} value (${result}) with ${propertyMap[property]}`);
result = propertyMap[property];
source = elem;
}
});
debug(`${base}.${property}: returning ${result} (from ${source})`);
return result;
}
function toProperty(prop) {
if (prop === 'true' || prop === 'yes') return true;
if (prop === 'false' || prop === 'no') return false;
if (prop.match(/^-?[0-9]+$/)) return parseInt(prop);
if (prop.match(/^-?[0-9]*\.[0-9]+$/)) return parseFloat(prop);
return prop;
}
function parseProperties(blob, name) {
const props = {};
blob.split('\n').forEach((line, index) => {
line = line.replace(/#.*/, '').trim();
if (!line) return;
let split = line.match(/([^=]+)=(.*)/);
if (!split) {
logger.error(`Bad line: ${line} in ${name}: ${index + 1}`);
return;
}
props[split[1].trim()] = toProperty(split[2].trim());
debug(`${split[1].trim()} = ${split[2].trim()}`);
});
return props;
}
function initialize(directory, hier) {
if (hier === null) throw new Error('Must supply a hierarchy array');
hierarchy = _.map(hier, x => x.toLowerCase());
logger.info(`Reading properties from ${directory} with hierarchy ${hierarchy}`);
const endsWith = /\.properties$/;
const propertyFiles = fs.readdirSync(directory).filter(filename => filename.match(endsWith));
properties = {};
propertyFiles.forEach(file => {
const baseName = file.replace(endsWith, '');
file = path.join(directory, file);
debug('Reading config from ' + file);
properties[baseName] = parseProperties(fs.readFileSync(file, 'utf-8'), file);
});
logger.debug("props.properties = ", properties);
}
function propsFor(base) {
return function (property, defaultValue) {
return get(base, property, defaultValue);
};
}
module.exports = {
get: get,
propsFor: propsFor,
initialize: initialize,
setDebug: function (debug) {
propDebug = debug;
}
};
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