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refactor(command): add
ArgumentsParser util class
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| import { green, magenta, red, yellow } from 'https://deno.land/std@v0.52.0/fmt/colors.ts'; | ||
| import { OptionType } from '../../flags/lib/types.ts'; | ||
| import { IArgumentDetails } from './types.ts'; | ||
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| export class ArgumentsParser { | ||
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| private static readonly ARGUMENT_REGEX = /^[<\[].+[\]>]$/; | ||
| private static readonly ARGUMENT_DETAILS_REGEX = /[<\[:>\]]/; | ||
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| public static splitArguments( args: string ): { args: string[], typeDefinition: string } { | ||
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| const parts = args.trim().split( /[, =] */g ); | ||
| const typeParts = []; | ||
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| while ( parts[ parts.length - 1 ] && this.ARGUMENT_REGEX.test( parts[ parts.length - 1 ] ) ) { | ||
| typeParts.unshift( parts.pop() ); | ||
| } | ||
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| const typeDefinition: string = typeParts.join( ' ' ); | ||
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| return { args: parts, typeDefinition }; | ||
| } | ||
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| public static parseArgumentsDefinition( argsDefinition: string ): IArgumentDetails[] { | ||
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| const argumentDetails: IArgumentDetails[] = []; | ||
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| let hasOptional = false; | ||
| let hasVariadic = false; | ||
| const parts: string[] = argsDefinition.split( / +/ ); | ||
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| for ( const arg of parts ) { | ||
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| if ( hasVariadic ) { | ||
| throw new Error( 'An argument can not follow an variadic argument.' ); | ||
| } | ||
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| const parts: string[] = arg.split( this.ARGUMENT_DETAILS_REGEX ); | ||
| const type: OptionType | string | undefined = parts[ 2 ] ? parts[ 2 ] : OptionType.STRING; | ||
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| let details: IArgumentDetails = { | ||
| optionalValue: arg[ 0 ] !== '<', | ||
| name: parts[ 1 ], | ||
| action: parts[ 3 ] || type, | ||
| variadic: false, | ||
| list: type ? arg.indexOf( type + '[]' ) !== -1 : false, | ||
| type | ||
| }; | ||
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| if ( !details.optionalValue && hasOptional ) { | ||
| throw new Error( 'An required argument can not follow an optional argument.' ); | ||
| } | ||
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| if ( arg[ 0 ] === '[' ) { | ||
| hasOptional = true; | ||
| } | ||
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| if ( details.name.length > 3 ) { | ||
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| const istVariadicLeft = details.name.slice( 0, 3 ) === '...'; | ||
| const istVariadicRight = details.name.slice( -3 ) === '...'; | ||
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| hasVariadic = details.variadic = istVariadicLeft || istVariadicRight; | ||
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| if ( istVariadicLeft ) { | ||
| details.name = details.name.slice( 3 ); | ||
| } else if ( istVariadicRight ) { | ||
| details.name = details.name.slice( 0, -3 ); | ||
| } | ||
| } | ||
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| if ( details.name ) { | ||
| argumentDetails.push( details ); | ||
| } | ||
| } | ||
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| return argumentDetails; | ||
| } | ||
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| public static highlightArguments( argsDefinition: string ) { | ||
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| if ( !argsDefinition ) { | ||
| return ''; | ||
| } | ||
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| return this.parseArgumentsDefinition( argsDefinition ) | ||
| .map( ( arg: IArgumentDetails ) => this.highlightArgumentDetails( arg ) ).join( ' ' ); | ||
| } | ||
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| public static highlightArgumentDetails( arg: IArgumentDetails ): string { | ||
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| let str = ''; | ||
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| str += yellow( arg.optionalValue ? '[' : '<' ); | ||
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| let name = ''; | ||
| name += arg.name; | ||
| if ( arg.variadic ) { | ||
| name += '...'; | ||
| } | ||
| name = magenta( name ); | ||
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| str += name; | ||
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| // if ( arg.name !== arg.type ) { | ||
| str += yellow( ':' ); | ||
| str += red( arg.type ); | ||
| // } | ||
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| if ( arg.list ) { | ||
| str += green( '[]' ); | ||
| } | ||
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| str += yellow( arg.optionalValue ? ']' : '>' ); | ||
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| return str; | ||
| } | ||
| } |
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