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* Part of Pleiar.no - a collection of tools for nurses
*
* Copyright (C) Eskild Hustvedt 2017-2018
* Copyright (C) Fagforbundet 2019-2021
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
// @flow
import { getValueFromLiteralOrEvent } from './helper.general';
import type { ReduxEventOrString } from './types/callbacks';
/**
* This provides some static helper functions for formatting and
* parsing numbers.
*/
const numbers = {
/**
* This parses a ReduxEventOrString and then hands it off to
* `numbers.parseFloatish`.
*/
parseFloatishFromThing (thing: ReduxEventOrString): "" | number
{
return numbers.parseFloatish( getValueFromLiteralOrEvent(thing) );
},
/**
* This parses a ReduxEventOrString, hands it off to numbers.parseFloatish
* and then ensures that it is within the range supplied. If it is below the range,
* it sets it to `min`, if it is above the range it sets it to `max`.
* If it's an empty string, that's just returned directly.
*/
floatishInRangeFromThing(thing: ReduxEventOrString | number, min: number, max: number): "" | number
{
let value: number | "";
if(typeof(thing) === "number")
{
value = thing;
}
else
{
value = numbers.parseFloatishFromThing(thing);
}
if(value === "")
{
return value;
}
if(value > max)
{
value = max;
}
else if(value < min)
{
value = min;
}
return value;
},
/**
* This does basically the same thing as parseFloatishFromThing, but
* it guarantees that it will return a number (or NaN).
*/
getFloatishFromThing (thing: number | ReduxEventOrString): number
{
if(typeof(thing) === "number")
{
return thing;
}
const value = getValueFromLiteralOrEvent(thing);
if(value === "")
{
throw('getFloatishFromThing: got empty string');
}
return numbers.parseFloat(value);
},
/**
* A third variant of parseFloatishFromThing. This one will return zero
* if it ends up with a string
*/
getFloatishOrZeroFromThing (thing: number | string | SyntheticEvent<HTMLInputElement>): number
{
if(typeof(thing) === "number")
{
return thing;
}
const valueFromThing = getValueFromLiteralOrEvent(thing);
const result = numbers.parseFloat(valueFromThing);
if(Number.isNaN(result))
{
return 0;
}
return result;
},
/**
* A function that either returns an empty string, or the result from
* `numbers.parseFloat`
*/
parseFloatish (toParse: string): "" | number
{
if(toParse === "")
{
return "";
}
return numbers.parseFloat(toParse);
},
/**
* A `Number.parseFloat` wrapper that handles both . and ,-delimited numbers.
*/
parseFloat (toParse: string): number
{
if(toParse.replace !== undefined)
{
toParse = toParse.replace(/,/g,'.');
}
return Number.parseFloat(toParse);
},
/**
* Formats a number according to the locale (no)
*/
format(number: number): string
{
return Number(number).toLocaleString("no");
},
/**
* Rounds a number to its closest 10
*/
roundNearestTen(number: number): number
{
return Math.round(number / 10) * 10;
},
/**
* Rounds a number to a fixed maximum of decimal places
*/
round(no: number, roundTo: number = 4): number
{
return (+Number(no).toFixed(roundTo));
},
/**
* Variant of `.round()` that only applies rounding if the roundingEnabled
* parameter is true
*/
conditionalRound(no: number, roundingEnabled: boolean, roundTo: number = 4): number
{
if(roundingEnabled)
{
return numbers.round(no,roundTo);
}
return no;
},
/**
* Rounds a number to its simplest significant decimal.
*/
roundToSimplestSignificant(no: number): number
{
for(const attempt of [0, 2, 3])
{
const result = numbers.round(no,attempt);
if(result > 0)
{
return result;
}
}
return no;
},
/**
* Variant of `.roundToSimplestSignificant` that only applies rounding if
* the roundingEnabled parameter is true
*/
conditionalRoundToSimplestSignificant(no: number, roundingEnabled: boolean): number
{
if(roundingEnabled)
{
return numbers.roundToSimplestSignificant(no);
}
return no;
}
};
export { numbers };
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