ct-react-stockcharts/lib/utils/slidingWindow.js

Highly customizable stock charts with ReactJS and d3

"use strict";

Object.defineProperty(exports, "__esModule", {
	value: true
});

exports.default = function () {

	var undefinedValue = undefined,
	    windowSize = 10,
	    accumulator = _noop2.default,
	    sourcePath = void 0,
	    source = void 0,
	    skipInitial = 0,
	    misc = void 0;

	// eslint-disable-next-line prefer-const
	var slidingWindow = function slidingWindow(data) {
		var sourceFunction = source || (0, _index.path)(sourcePath);

		var size = (0, _index.functor)(windowSize).apply(this, arguments);
		var windowData = data.slice(skipInitial, size + skipInitial).map(sourceFunction);
		var accumulatorIdx = 0;
		var undef = (0, _index.functor)(undefinedValue);
		// console.log(skipInitial, size, data.length, windowData.length);
		return data.map(function (d, i) {
			// console.log(d, i);
			if (i < skipInitial + size - 1) {
				return undef(sourceFunction(d), i, misc);
			}
			if (i >= skipInitial + size) {
				// Treat windowData as FIFO rolling buffer
				windowData.shift();
				windowData.push(sourceFunction(d, i));
			}
			return accumulator(windowData, i, accumulatorIdx++, misc);
		});
	};

	slidingWindow.undefinedValue = function (x) {
		if (!arguments.length) {
			return undefinedValue;
		}
		undefinedValue = x;
		return slidingWindow;
	};
	slidingWindow.windowSize = function (x) {
		if (!arguments.length) {
			return windowSize;
		}
		windowSize = x;
		return slidingWindow;
	};
	slidingWindow.misc = function (x) {
		if (!arguments.length) {
			return misc;
		}
		misc = x;
		return slidingWindow;
	};
	slidingWindow.accumulator = function (x) {
		if (!arguments.length) {
			return accumulator;
		}
		accumulator = x;
		return slidingWindow;
	};
	slidingWindow.skipInitial = function (x) {
		if (!arguments.length) {
			return skipInitial;
		}
		skipInitial = x;
		return slidingWindow;
	};
	slidingWindow.sourcePath = function (x) {
		if (!arguments.length) {
			return sourcePath;
		}
		sourcePath = x;
		return slidingWindow;
	};
	slidingWindow.source = function (x) {
		if (!arguments.length) {
			return source;
		}
		source = x;
		return slidingWindow;
	};

	return slidingWindow;
};

var _noop = require("./noop");

var _noop2 = _interopRequireDefault(_noop);

var _index = require("./index");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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