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src/plugins/data/common/field_formats/converters/date_nanos_shared.ts
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| /* | ||
| * Licensed to Elasticsearch B.V. under one or more contributor | ||
| * license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright | ||
| * ownership. Elasticsearch B.V. licenses this file to you under | ||
| * the Apache License, Version 2.0 (the "License"); you may | ||
| * not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
|
|
||
| import { i18n } from '@kbn/i18n'; | ||
| import { memoize, noop } from 'lodash'; | ||
| import moment, { Moment } from 'moment'; | ||
| import { FieldFormat, FIELD_FORMAT_IDS, KBN_FIELD_TYPES, TextContextTypeConvert } from '../../'; | ||
|
|
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| /** | ||
| * Analyse the given moment.js format pattern for the fractional sec part (S,SS,SSS...) | ||
| * returning length, match, pattern and an escaped pattern, that excludes the fractional | ||
| * part when formatting with moment.js -> e.g. [SSS] | ||
| */ | ||
| export function analysePatternForFract(pattern: string) { | ||
| const fracSecMatch = pattern.match('S+') as any; // extract fractional seconds sub-pattern | ||
| const fracSecMatchStr = fracSecMatch ? fracSecMatch[0] : ''; | ||
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| return { | ||
| length: fracSecMatchStr.length, | ||
| patternNanos: fracSecMatchStr, | ||
| pattern, | ||
| patternEscaped: fracSecMatchStr ? pattern.replace(fracSecMatch, `[${fracSecMatch}]`) : '', | ||
| }; | ||
| } | ||
|
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||
| /** | ||
| * Format a given moment.js date object | ||
| * Since momentjs would loose the exact value for fractional seconds with a higher resolution than | ||
| * milliseconds, the fractional pattern is replaced by the fractional value of the raw timestamp | ||
| */ | ||
| export function formatWithNanos( | ||
| dateMomentObj: Moment, | ||
| valRaw: string, | ||
| fracPatternObj: Record<string, any> | ||
| ) { | ||
| if (fracPatternObj.length <= 3) { | ||
| // S,SS,SSS is formatted correctly by moment.js | ||
| return dateMomentObj.format(fracPatternObj.pattern); | ||
| } else { | ||
| // Beyond SSS the precise value of the raw datetime string is used | ||
| const valFormatted = dateMomentObj.format(fracPatternObj.patternEscaped); | ||
| // Extract fractional value of ES formatted timestamp, zero pad if necessary: | ||
| // 2020-05-18T20:45:05.957Z -> 957000000 | ||
| // 2020-05-18T20:45:05.957000123Z -> 957000123 | ||
| // we do not need to take care of the year 10000 bug since max year of date_nanos is 2262 | ||
| const valNanos = valRaw | ||
| .substr(20, valRaw.length - 21) // remove timezone(Z) | ||
| .padEnd(9, '0') // pad shorter fractionals | ||
| .substr(0, fracPatternObj.patternNanos.length); | ||
| return valFormatted.replace(fracPatternObj.patternNanos, valNanos); | ||
| } | ||
| } | ||
|
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||
| export class DateNanosFormat extends FieldFormat { | ||
| static id = FIELD_FORMAT_IDS.DATE_NANOS; | ||
| static title = i18n.translate('data.fieldFormats.date_nanos.title', { | ||
| defaultMessage: 'Date nanos', | ||
| }); | ||
| static fieldType = KBN_FIELD_TYPES.DATE; | ||
|
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| protected memoizedConverter: Function = noop; | ||
| protected memoizedPattern: string = ''; | ||
| protected timeZone: string = ''; | ||
|
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| getParamDefaults() { | ||
| return { | ||
| pattern: this.getConfig!('dateNanosFormat'), | ||
| fallbackPattern: this.getConfig!('dateFormat'), | ||
| timezone: this.getConfig!('dateFormat:tz'), | ||
| }; | ||
| } | ||
|
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| textConvert: TextContextTypeConvert = (val) => { | ||
| // don't give away our ref to converter so | ||
| // we can hot-swap when config changes | ||
| const pattern = this.param('pattern'); | ||
| const timezone = this.param('timezone'); | ||
| const fractPattern = analysePatternForFract(pattern); | ||
| const fallbackPattern = this.param('patternFallback'); | ||
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| const timezoneChanged = this.timeZone !== timezone; | ||
| const datePatternChanged = this.memoizedPattern !== pattern; | ||
| if (timezoneChanged || datePatternChanged) { | ||
| this.timeZone = timezone; | ||
| this.memoizedPattern = pattern; | ||
|
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| this.memoizedConverter = memoize(function converter(value: any) { | ||
| if (value === null || value === undefined) { | ||
| return '-'; | ||
| } | ||
|
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| const date = moment(value); | ||
|
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| if (typeof value !== 'string' && date.isValid()) { | ||
| // fallback for max/min aggregation, where unixtime in ms is returned as a number | ||
| // aggregations in Elasticsearch generally just return ms | ||
| return date.format(fallbackPattern); | ||
| } else if (date.isValid()) { | ||
| return formatWithNanos(date, value, fractPattern); | ||
| } else { | ||
| return value; | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| return this.memoizedConverter(val); | ||
| }; | ||
| } |
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