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/**
* @namespace Chart._adapters
* @since 2.8.0
* @private
*/
'use strict';
var helpers = require('../helpers/index');
function abstract() {
throw new Error(
'This method is not implemented: either no adapter can ' +
'be found or an incomplete integration was provided.'
);
}
/**
* Date adapter (current used by the time scale)
* @namespace Chart._adapters._date
* @memberof Chart._adapters
* @private
*/
/**
* Currently supported unit string values.
* @typedef {('millisecond'|'second'|'minute'|'hour'|'day'|'week'|'month'|'quarter'|'year')}
* @memberof Chart._adapters._date
* @name Unit
*/
/**
* @class
*/
function DateAdapter(options) {
this.options = options || {};
}
helpers.extend(DateAdapter.prototype, /** @lends DateAdapter */ {
/**
* Returns a map of time formats for the supported formatting units defined
* in Unit as well as 'datetime' representing a detailed date/time string.
* @returns {{string: string}}
*/
formats: abstract,
/**
* Parses the given `value` and return the associated timestamp.
* @param {any} value - the value to parse (usually comes from the data)
* @param {string} [format] - the expected data format
* @returns {(number|null)}
* @function
*/
parse: abstract,
/**
* Returns the formatted date in the specified `format` for a given `timestamp`.
* @param {number} timestamp - the timestamp to format
* @param {string} format - the date/time token
* @return {string}
* @function
*/
format: abstract,
/**
* Adds the specified `amount` of `unit` to the given `timestamp`.
* @param {number} timestamp - the input timestamp
* @param {number} amount - the amount to add
* @param {Unit} unit - the unit as string
* @return {number}
* @function
*/
add: abstract,
/**
* Returns the number of `unit` between the given timestamps.
* @param {number} max - the input timestamp (reference)
* @param {number} min - the timestamp to substract
* @param {Unit} unit - the unit as string
* @return {number}
* @function
*/
diff: abstract,
/**
* Returns start of `unit` for the given `timestamp`.
* @param {number} timestamp - the input timestamp
* @param {Unit} unit - the unit as string
* @param {number} [weekday] - the ISO day of the week with 1 being Monday
* and 7 being Sunday (only needed if param *unit* is `isoWeek`).
* @function
*/
startOf: abstract,
/**
* Returns end of `unit` for the given `timestamp`.
* @param {number} timestamp - the input timestamp
* @param {Unit} unit - the unit as string
* @function
*/
endOf: abstract,
// DEPRECATIONS
/**
* Provided for backward compatibility for scale.getValueForPixel(),
* this method should be overridden only by the moment adapter.
* @deprecated since version 2.8.0
* @todo remove at version 3
* @private
*/
_create: function(value) {
return value;
}
});
DateAdapter.override = function(members) {
helpers.extend(DateAdapter.prototype, members);
};
module.exports._date = DateAdapter;