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Current File : /data/letsfame/admin/vendor/assets/node_modules/Chart.js/src/scales/scale.time.js
/* global window: false */
'use strict';

var moment = require('moment');
moment = typeof moment === 'function' ? moment : window.moment;

var defaults = require('../core/core.defaults');
var helpers = require('../helpers/index');

// Integer constants are from the ES6 spec.
var MIN_INTEGER = Number.MIN_SAFE_INTEGER || -9007199254740991;
var MAX_INTEGER = Number.MAX_SAFE_INTEGER || 9007199254740991;

var INTERVALS = {
	millisecond: {
		common: true,
		size: 1,
		steps: [1, 2, 5, 10, 20, 50, 100, 250, 500]
	},
	second: {
		common: true,
		size: 1000,
		steps: [1, 2, 5, 10, 30]
	},
	minute: {
		common: true,
		size: 60000,
		steps: [1, 2, 5, 10, 30]
	},
	hour: {
		common: true,
		size: 3600000,
		steps: [1, 2, 3, 6, 12]
	},
	day: {
		common: true,
		size: 86400000,
		steps: [1, 2, 5]
	},
	week: {
		common: false,
		size: 604800000,
		steps: [1, 2, 3, 4]
	},
	month: {
		common: true,
		size: 2.628e9,
		steps: [1, 2, 3]
	},
	quarter: {
		common: false,
		size: 7.884e9,
		steps: [1, 2, 3, 4]
	},
	year: {
		common: true,
		size: 3.154e10
	}
};

var UNITS = Object.keys(INTERVALS);

function sorter(a, b) {
	return a - b;
}

function arrayUnique(items) {
	var hash = {};
	var out = [];
	var i, ilen, item;

	for (i = 0, ilen = items.length; i < ilen; ++i) {
		item = items[i];
		if (!hash[item]) {
			hash[item] = true;
			out.push(item);
		}
	}

	return out;
}

/**
 * Returns an array of {time, pos} objects used to interpolate a specific `time` or position
 * (`pos`) on the scale, by searching entries before and after the requested value. `pos` is
 * a decimal between 0 and 1: 0 being the start of the scale (left or top) and 1 the other
 * extremity (left + width or top + height). Note that it would be more optimized to directly
 * store pre-computed pixels, but the scale dimensions are not guaranteed at the time we need
 * to create the lookup table. The table ALWAYS contains at least two items: min and max.
 *
 * @param {Number[]} timestamps - timestamps sorted from lowest to highest.
 * @param {String} distribution - If 'linear', timestamps will be spread linearly along the min
 * and max range, so basically, the table will contains only two items: {min, 0} and {max, 1}.
 * If 'series', timestamps will be positioned at the same distance from each other. In this
 * case, only timestamps that break the time linearity are registered, meaning that in the
 * best case, all timestamps are linear, the table contains only min and max.
 */
function buildLookupTable(timestamps, min, max, distribution) {
	if (distribution === 'linear' || !timestamps.length) {
		return [
			{time: min, pos: 0},
			{time: max, pos: 1}
		];
	}

	var table = [];
	var items = [min];
	var i, ilen, prev, curr, next;

	for (i = 0, ilen = timestamps.length; i < ilen; ++i) {
		curr = timestamps[i];
		if (curr > min && curr < max) {
			items.push(curr);
		}
	}

	items.push(max);

	for (i = 0, ilen = items.length; i < ilen; ++i) {
		next = items[i + 1];
		prev = items[i - 1];
		curr = items[i];

		// only add points that breaks the scale linearity
		if (prev === undefined || next === undefined || Math.round((next + prev) / 2) !== curr) {
			table.push({time: curr, pos: i / (ilen - 1)});
		}
	}

	return table;
}

// @see adapted from http://www.anujgakhar.com/2014/03/01/binary-search-in-javascript/
function lookup(table, key, value) {
	var lo = 0;
	var hi = table.length - 1;
	var mid, i0, i1;

	while (lo >= 0 && lo <= hi) {
		mid = (lo + hi) >> 1;
		i0 = table[mid - 1] || null;
		i1 = table[mid];

		if (!i0) {
			// given value is outside table (before first item)
			return {lo: null, hi: i1};
		} else if (i1[key] < value) {
			lo = mid + 1;
		} else if (i0[key] > value) {
			hi = mid - 1;
		} else {
			return {lo: i0, hi: i1};
		}
	}

	// given value is outside table (after last item)
	return {lo: i1, hi: null};
}

/**
 * Linearly interpolates the given source `value` using the table items `skey` values and
 * returns the associated `tkey` value. For example, interpolate(table, 'time', 42, 'pos')
 * returns the position for a timestamp equal to 42. If value is out of bounds, values at
 * index [0, 1] or [n - 1, n] are used for the interpolation.
 */
function interpolate(table, skey, sval, tkey) {
	var range = lookup(table, skey, sval);

	// Note: the lookup table ALWAYS contains at least 2 items (min and max)
	var prev = !range.lo ? table[0] : !range.hi ? table[table.length - 2] : range.lo;
	var next = !range.lo ? table[1] : !range.hi ? table[table.length - 1] : range.hi;

	var span = next[skey] - prev[skey];
	var ratio = span ? (sval - prev[skey]) / span : 0;
	var offset = (next[tkey] - prev[tkey]) * ratio;

	return prev[tkey] + offset;
}

/**
 * Convert the given value to a moment object using the given time options.
 * @see http://momentjs.com/docs/#/parsing/
 */
function momentify(value, options) {
	var parser = options.parser;
	var format = options.parser || options.format;

	if (typeof parser === 'function') {
		return parser(value);
	}

	if (typeof value === 'string' && typeof format === 'string') {
		return moment(value, format);
	}

	if (!(value instanceof moment)) {
		value = moment(value);
	}

	if (value.isValid()) {
		return value;
	}

	// Labels are in an incompatible moment format and no `parser` has been provided.
	// The user might still use the deprecated `format` option to convert his inputs.
	if (typeof format === 'function') {
		return format(value);
	}

	return value;
}

function parse(input, scale) {
	if (helpers.isNullOrUndef(input)) {
		return null;
	}

	var options = scale.options.time;
	var value = momentify(scale.getRightValue(input), options);
	if (!value.isValid()) {
		return null;
	}

	if (options.round) {
		value.startOf(options.round);
	}

	return value.valueOf();
}

/**
 * Returns the number of unit to skip to be able to display up to `capacity` number of ticks
 * in `unit` for the given `min` / `max` range and respecting the interval steps constraints.
 */
function determineStepSize(min, max, unit, capacity) {
	var range = max - min;
	var interval = INTERVALS[unit];
	var milliseconds = interval.size;
	var steps = interval.steps;
	var i, ilen, factor;

	if (!steps) {
		return Math.ceil(range / (capacity * milliseconds));
	}

	for (i = 0, ilen = steps.length; i < ilen; ++i) {
		factor = steps[i];
		if (Math.ceil(range / (milliseconds * factor)) <= capacity) {
			break;
		}
	}

	return factor;
}

/**
 * Figures out what unit results in an appropriate number of auto-generated ticks
 */
function determineUnitForAutoTicks(minUnit, min, max, capacity) {
	var ilen = UNITS.length;
	var i, interval, factor;

	for (i = UNITS.indexOf(minUnit); i < ilen - 1; ++i) {
		interval = INTERVALS[UNITS[i]];
		factor = interval.steps ? interval.steps[interval.steps.length - 1] : MAX_INTEGER;

		if (interval.common && Math.ceil((max - min) / (factor * interval.size)) <= capacity) {
			return UNITS[i];
		}
	}

	return UNITS[ilen - 1];
}

/**
 * Figures out what unit to format a set of ticks with
 */
function determineUnitForFormatting(ticks, minUnit, min, max) {
	var duration = moment.duration(moment(max).diff(moment(min)));
	var ilen = UNITS.length;
	var i, unit;

	for (i = ilen - 1; i >= UNITS.indexOf(minUnit); i--) {
		unit = UNITS[i];
		if (INTERVALS[unit].common && duration.as(unit) >= ticks.length) {
			return unit;
		}
	}

	return UNITS[minUnit ? UNITS.indexOf(minUnit) : 0];
}

function determineMajorUnit(unit) {
	for (var i = UNITS.indexOf(unit) + 1, ilen = UNITS.length; i < ilen; ++i) {
		if (INTERVALS[UNITS[i]].common) {
			return UNITS[i];
		}
	}
}

/**
 * Generates a maximum of `capacity` timestamps between min and max, rounded to the
 * `minor` unit, aligned on the `major` unit and using the given scale time `options`.
 * Important: this method can return ticks outside the min and max range, it's the
 * responsibility of the calling code to clamp values if needed.
 */
function generate(min, max, capacity, options) {
	var timeOpts = options.time;
	var minor = timeOpts.unit || determineUnitForAutoTicks(timeOpts.minUnit, min, max, capacity);
	var major = determineMajorUnit(minor);
	var stepSize = helpers.valueOrDefault(timeOpts.stepSize, timeOpts.unitStepSize);
	var weekday = minor === 'week' ? timeOpts.isoWeekday : false;
	var majorTicksEnabled = options.ticks.major.enabled;
	var interval = INTERVALS[minor];
	var first = moment(min);
	var last = moment(max);
	var ticks = [];
	var time;

	if (!stepSize) {
		stepSize = determineStepSize(min, max, minor, capacity);
	}

	// For 'week' unit, handle the first day of week option
	if (weekday) {
		first = first.isoWeekday(weekday);
		last = last.isoWeekday(weekday);
	}

	// Align first/last ticks on unit
	first = first.startOf(weekday ? 'day' : minor);
	last = last.startOf(weekday ? 'day' : minor);

	// Make sure that the last tick include max
	if (last < max) {
		last.add(1, minor);
	}

	time = moment(first);

	if (majorTicksEnabled && major && !weekday && !timeOpts.round) {
		// Align the first tick on the previous `minor` unit aligned on the `major` unit:
		// we first aligned time on the previous `major` unit then add the number of full
		// stepSize there is between first and the previous major time.
		time.startOf(major);
		time.add(~~((first - time) / (interval.size * stepSize)) * stepSize, minor);
	}

	for (; time < last; time.add(stepSize, minor)) {
		ticks.push(+time);
	}

	ticks.push(+time);

	return ticks;
}

/**
 * Returns the right and left offsets from edges in the form of {left, right}.
 * Offsets are added when the `offset` option is true.
 */
function computeOffsets(table, ticks, min, max, options) {
	var left = 0;
	var right = 0;
	var upper, lower;

	if (options.offset && ticks.length) {
		if (!options.time.min) {
			upper = ticks.length > 1 ? ticks[1] : max;
			lower = ticks[0];
			left = (
				interpolate(table, 'time', upper, 'pos') -
				interpolate(table, 'time', lower, 'pos')
			) / 2;
		}
		if (!options.time.max) {
			upper = ticks[ticks.length - 1];
			lower = ticks.length > 1 ? ticks[ticks.length - 2] : min;
			right = (
				interpolate(table, 'time', upper, 'pos') -
				interpolate(table, 'time', lower, 'pos')
			) / 2;
		}
	}

	return {left: left, right: right};
}

function ticksFromTimestamps(values, majorUnit) {
	var ticks = [];
	var i, ilen, value, major;

	for (i = 0, ilen = values.length; i < ilen; ++i) {
		value = values[i];
		major = majorUnit ? value === +moment(value).startOf(majorUnit) : false;

		ticks.push({
			value: value,
			major: major
		});
	}

	return ticks;
}

function determineLabelFormat(data, timeOpts) {
	var i, momentDate, hasTime;
	var ilen = data.length;

	// find the label with the most parts (milliseconds, minutes, etc.)
	// format all labels with the same level of detail as the most specific label
	for (i = 0; i < ilen; i++) {
		momentDate = momentify(data[i], timeOpts);
		if (momentDate.millisecond() !== 0) {
			return 'MMM D, YYYY h:mm:ss.SSS a';
		}
		if (momentDate.second() !== 0 || momentDate.minute() !== 0 || momentDate.hour() !== 0) {
			hasTime = true;
		}
	}
	if (hasTime) {
		return 'MMM D, YYYY h:mm:ss a';
	}
	return 'MMM D, YYYY';
}

module.exports = function(Chart) {

	var defaultConfig = {
		position: 'bottom',

		/**
		 * Data distribution along the scale:
		 * - 'linear': data are spread according to their time (distances can vary),
		 * - 'series': data are spread at the same distance from each other.
		 * @see https://github.com/chartjs/Chart.js/pull/4507
		 * @since 2.7.0
		 */
		distribution: 'linear',

		/**
		 * Scale boundary strategy (bypassed by min/max time options)
		 * - `data`: make sure data are fully visible, ticks outside are removed
		 * - `ticks`: make sure ticks are fully visible, data outside are truncated
		 * @see https://github.com/chartjs/Chart.js/pull/4556
		 * @since 2.7.0
		 */
		bounds: 'data',

		time: {
			parser: false, // false == a pattern string from http://momentjs.com/docs/#/parsing/string-format/ or a custom callback that converts its argument to a moment
			format: false, // DEPRECATED false == date objects, moment object, callback or a pattern string from http://momentjs.com/docs/#/parsing/string-format/
			unit: false, // false == automatic or override with week, month, year, etc.
			round: false, // none, or override with week, month, year, etc.
			displayFormat: false, // DEPRECATED
			isoWeekday: false, // override week start day - see http://momentjs.com/docs/#/get-set/iso-weekday/
			minUnit: 'millisecond',

			// defaults to unit's corresponding unitFormat below or override using pattern string from http://momentjs.com/docs/#/displaying/format/
			displayFormats: {
				millisecond: 'h:mm:ss.SSS a', // 11:20:01.123 AM,
				second: 'h:mm:ss a', // 11:20:01 AM
				minute: 'h:mm a', // 11:20 AM
				hour: 'hA', // 5PM
				day: 'MMM D', // Sep 4
				week: 'll', // Week 46, or maybe "[W]WW - YYYY" ?
				month: 'MMM YYYY', // Sept 2015
				quarter: '[Q]Q - YYYY', // Q3
				year: 'YYYY' // 2015
			},
		},
		ticks: {
			autoSkip: false,

			/**
			 * Ticks generation input values:
			 * - 'auto': generates "optimal" ticks based on scale size and time options.
			 * - 'data': generates ticks from data (including labels from data {t|x|y} objects).
			 * - 'labels': generates ticks from user given `data.labels` values ONLY.
			 * @see https://github.com/chartjs/Chart.js/pull/4507
			 * @since 2.7.0
			 */
			source: 'auto',

			major: {
				enabled: false
			}
		}
	};

	var TimeScale = Chart.Scale.extend({
		initialize: function() {
			if (!moment) {
				throw new Error('Chart.js - Moment.js could not be found! You must include it before Chart.js to use the time scale. Download at https://momentjs.com');
			}

			this.mergeTicksOptions();

			Chart.Scale.prototype.initialize.call(this);
		},

		update: function() {
			var me = this;
			var options = me.options;

			// DEPRECATIONS: output a message only one time per update
			if (options.time && options.time.format) {
				console.warn('options.time.format is deprecated and replaced by options.time.parser.');
			}

			return Chart.Scale.prototype.update.apply(me, arguments);
		},

		/**
		 * Allows data to be referenced via 't' attribute
		 */
		getRightValue: function(rawValue) {
			if (rawValue && rawValue.t !== undefined) {
				rawValue = rawValue.t;
			}
			return Chart.Scale.prototype.getRightValue.call(this, rawValue);
		},

		determineDataLimits: function() {
			var me = this;
			var chart = me.chart;
			var timeOpts = me.options.time;
			var unit = timeOpts.unit || 'day';
			var min = MAX_INTEGER;
			var max = MIN_INTEGER;
			var timestamps = [];
			var datasets = [];
			var labels = [];
			var i, j, ilen, jlen, data, timestamp;

			// Convert labels to timestamps
			for (i = 0, ilen = chart.data.labels.length; i < ilen; ++i) {
				labels.push(parse(chart.data.labels[i], me));
			}

			// Convert data to timestamps
			for (i = 0, ilen = (chart.data.datasets || []).length; i < ilen; ++i) {
				if (chart.isDatasetVisible(i)) {
					data = chart.data.datasets[i].data;

					// Let's consider that all data have the same format.
					if (helpers.isObject(data[0])) {
						datasets[i] = [];

						for (j = 0, jlen = data.length; j < jlen; ++j) {
							timestamp = parse(data[j], me);
							timestamps.push(timestamp);
							datasets[i][j] = timestamp;
						}
					} else {
						timestamps.push.apply(timestamps, labels);
						datasets[i] = labels.slice(0);
					}
				} else {
					datasets[i] = [];
				}
			}

			if (labels.length) {
				// Sort labels **after** data have been converted
				labels = arrayUnique(labels).sort(sorter);
				min = Math.min(min, labels[0]);
				max = Math.max(max, labels[labels.length - 1]);
			}

			if (timestamps.length) {
				timestamps = arrayUnique(timestamps).sort(sorter);
				min = Math.min(min, timestamps[0]);
				max = Math.max(max, timestamps[timestamps.length - 1]);
			}

			min = parse(timeOpts.min, me) || min;
			max = parse(timeOpts.max, me) || max;

			// In case there is no valid min/max, set limits based on unit time option
			min = min === MAX_INTEGER ? +moment().startOf(unit) : min;
			max = max === MIN_INTEGER ? +moment().endOf(unit) + 1 : max;

			// Make sure that max is strictly higher than min (required by the lookup table)
			me.min = Math.min(min, max);
			me.max = Math.max(min + 1, max);

			// PRIVATE
			me._horizontal = me.isHorizontal();
			me._table = [];
			me._timestamps = {
				data: timestamps,
				datasets: datasets,
				labels: labels
			};
		},

		buildTicks: function() {
			var me = this;
			var min = me.min;
			var max = me.max;
			var options = me.options;
			var timeOpts = options.time;
			var timestamps = [];
			var ticks = [];
			var i, ilen, timestamp;

			switch (options.ticks.source) {
			case 'data':
				timestamps = me._timestamps.data;
				break;
			case 'labels':
				timestamps = me._timestamps.labels;
				break;
			case 'auto':
			default:
				timestamps = generate(min, max, me.getLabelCapacity(min), options);
			}

			if (options.bounds === 'ticks' && timestamps.length) {
				min = timestamps[0];
				max = timestamps[timestamps.length - 1];
			}

			// Enforce limits with user min/max options
			min = parse(timeOpts.min, me) || min;
			max = parse(timeOpts.max, me) || max;

			// Remove ticks outside the min/max range
			for (i = 0, ilen = timestamps.length; i < ilen; ++i) {
				timestamp = timestamps[i];
				if (timestamp >= min && timestamp <= max) {
					ticks.push(timestamp);
				}
			}

			me.min = min;
			me.max = max;

			// PRIVATE
			me._unit = timeOpts.unit || determineUnitForFormatting(ticks, timeOpts.minUnit, me.min, me.max);
			me._majorUnit = determineMajorUnit(me._unit);
			me._table = buildLookupTable(me._timestamps.data, min, max, options.distribution);
			me._offsets = computeOffsets(me._table, ticks, min, max, options);
			me._labelFormat = determineLabelFormat(me._timestamps.data, timeOpts);

			return ticksFromTimestamps(ticks, me._majorUnit);
		},

		getLabelForIndex: function(index, datasetIndex) {
			var me = this;
			var data = me.chart.data;
			var timeOpts = me.options.time;
			var label = data.labels && index < data.labels.length ? data.labels[index] : '';
			var value = data.datasets[datasetIndex].data[index];

			if (helpers.isObject(value)) {
				label = me.getRightValue(value);
			}
			if (timeOpts.tooltipFormat) {
				return momentify(label, timeOpts).format(timeOpts.tooltipFormat);
			}
			if (typeof label === 'string') {
				return label;
			}

			return momentify(label, timeOpts).format(me._labelFormat);
		},

		/**
		 * Function to format an individual tick mark
		 * @private
		 */
		tickFormatFunction: function(tick, index, ticks, formatOverride) {
			var me = this;
			var options = me.options;
			var time = tick.valueOf();
			var formats = options.time.displayFormats;
			var minorFormat = formats[me._unit];
			var majorUnit = me._majorUnit;
			var majorFormat = formats[majorUnit];
			var majorTime = tick.clone().startOf(majorUnit).valueOf();
			var majorTickOpts = options.ticks.major;
			var major = majorTickOpts.enabled && majorUnit && majorFormat && time === majorTime;
			var label = tick.format(formatOverride ? formatOverride : major ? majorFormat : minorFormat);
			var tickOpts = major ? majorTickOpts : options.ticks.minor;
			var formatter = helpers.valueOrDefault(tickOpts.callback, tickOpts.userCallback);

			return formatter ? formatter(label, index, ticks) : label;
		},

		convertTicksToLabels: function(ticks) {
			var labels = [];
			var i, ilen;

			for (i = 0, ilen = ticks.length; i < ilen; ++i) {
				labels.push(this.tickFormatFunction(moment(ticks[i].value), i, ticks));
			}

			return labels;
		},

		/**
		 * @private
		 */
		getPixelForOffset: function(time) {
			var me = this;
			var size = me._horizontal ? me.width : me.height;
			var start = me._horizontal ? me.left : me.top;
			var pos = interpolate(me._table, 'time', time, 'pos');

			return start + size * (me._offsets.left + pos) / (me._offsets.left + 1 + me._offsets.right);
		},

		getPixelForValue: function(value, index, datasetIndex) {
			var me = this;
			var time = null;

			if (index !== undefined && datasetIndex !== undefined) {
				time = me._timestamps.datasets[datasetIndex][index];
			}

			if (time === null) {
				time = parse(value, me);
			}

			if (time !== null) {
				return me.getPixelForOffset(time);
			}
		},

		getPixelForTick: function(index) {
			var ticks = this.getTicks();
			return index >= 0 && index < ticks.length ?
				this.getPixelForOffset(ticks[index].value) :
				null;
		},

		getValueForPixel: function(pixel) {
			var me = this;
			var size = me._horizontal ? me.width : me.height;
			var start = me._horizontal ? me.left : me.top;
			var pos = (size ? (pixel - start) / size : 0) * (me._offsets.left + 1 + me._offsets.left) - me._offsets.right;
			var time = interpolate(me._table, 'pos', pos, 'time');

			return moment(time);
		},

		/**
		 * Crude approximation of what the label width might be
		 * @private
		 */
		getLabelWidth: function(label) {
			var me = this;
			var ticksOpts = me.options.ticks;
			var tickLabelWidth = me.ctx.measureText(label).width;
			var angle = helpers.toRadians(ticksOpts.maxRotation);
			var cosRotation = Math.cos(angle);
			var sinRotation = Math.sin(angle);
			var tickFontSize = helpers.valueOrDefault(ticksOpts.fontSize, defaults.global.defaultFontSize);

			return (tickLabelWidth * cosRotation) + (tickFontSize * sinRotation);
		},

		/**
		 * @private
		 */
		getLabelCapacity: function(exampleTime) {
			var me = this;

			var formatOverride = me.options.time.displayFormats.millisecond;	// Pick the longest format for guestimation

			var exampleLabel = me.tickFormatFunction(moment(exampleTime), 0, [], formatOverride);
			var tickLabelWidth = me.getLabelWidth(exampleLabel);
			var innerWidth = me.isHorizontal() ? me.width : me.height;

			var capacity = Math.floor(innerWidth / tickLabelWidth);
			return capacity > 0 ? capacity : 1;
		}
	});

	Chart.scaleService.registerScaleType('time', TimeScale, defaultConfig);
};
Youez - 2016 - github.com/yon3zu
LinuXploit