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list.ts
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list.ts
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import { GenericPrompt } from "./_generic_prompt.ts";
import {
GenericSuggestions,
GenericSuggestionsKeys,
GenericSuggestionsOptions,
GenericSuggestionsSettings,
} from "./_generic_suggestions.ts";
import { blue, dim, normalize, underline, yellow } from "./deps.ts";
import { Figures } from "./figures.ts";
/** List key options. */
export type ListKeys = GenericSuggestionsKeys;
/** List prompt options. */
export interface ListOptions
extends GenericSuggestionsOptions<string[], string> {
separator?: string;
minLength?: number;
maxLength?: number;
minTags?: number;
maxTags?: number;
keys?: ListKeys;
}
/** List prompt settings. */
interface ListSettings extends GenericSuggestionsSettings<string[], string> {
separator: string;
minLength: number;
maxLength: number;
minTags: number;
maxTags: number;
keys?: ListKeys;
}
/** List prompt representation. */
export class List extends GenericSuggestions<string[], string, ListSettings> {
/** Execute the prompt and show cursor on end. */
public static prompt(options: string | ListOptions): Promise<string[]> {
if (typeof options === "string") {
options = { message: options };
}
return new this({
pointer: blue(Figures.POINTER_SMALL),
prefix: yellow("? "),
indent: " ",
listPointer: blue(Figures.POINTER),
maxRows: 8,
separator: ",",
minLength: 0,
maxLength: Infinity,
minTags: 0,
maxTags: Infinity,
...options,
}).prompt();
}
/**
* Inject prompt value. Can be used for unit tests or pre selections.
* @param value Input value.
*/
public static inject(value: string): void {
GenericPrompt.inject(value);
}
protected input(): string {
const oldInput: string = this.inputValue;
const tags: string[] = this.getTags(oldInput);
const separator: string = this.settings.separator + " ";
if (this.settings.files && tags.length > 1) {
tags[tags.length - 2] = normalize(tags[tags.length - 2]);
}
this.inputValue = tags.join(separator);
const diff = oldInput.length - this.inputValue.length;
this.inputIndex -= diff;
this.cursor.x -= diff;
return tags
.map((val: string) => underline(val))
.join(separator) +
dim(this.getSuggestion());
}
protected getTags(value: string = this.inputValue): Array<string> {
return value.trim().split(this.regexp());
}
/** Create list regex.*/
protected regexp(): RegExp {
return new RegExp(
this.settings.separator === " " ? ` +` : ` *${this.settings.separator} *`,
);
}
protected success(value: string[]): string | undefined {
this.saveSuggestions(...value);
return super.success(value);
}
/** Get input value. */
protected getValue(): string {
// Remove trailing comma and spaces.
const input = this.inputValue.replace(/,+\s*$/, "");
if (!this.settings.files) {
return input;
}
return this.getTags(input)
.map(normalize)
.join(this.settings.separator + " ");
}
protected getCurrentInputValue(): string {
return this.getTags().pop() ?? "";
}
/** Add char. */
protected addChar(char: string): void {
switch (char) {
case this.settings.separator:
if (
this.inputValue.length &&
this.inputValue.trim().slice(-1) !== this.settings.separator
) {
super.addChar(char);
}
this.suggestionsIndex = -1;
this.suggestionsOffset = 0;
break;
default:
super.addChar(char);
}
}
/** Delete char left. */
protected deleteChar(): void {
if (this.inputValue[this.inputIndex - 1] === " ") {
super.deleteChar();
}
super.deleteChar();
}
protected async complete(): Promise<string> {
const tags = this.getTags().slice(0, -1);
tags.push(await super.complete());
return tags.join(this.settings.separator + " ");
}
/**
* Validate input value.
* @param value User input value.
* @return True on success, false or error message on error.
*/
protected validate(value: string): boolean | string {
if (typeof value !== "string") {
return false;
}
const values = this.transform(value);
for (const val of values) {
if (val.length < this.settings.minLength) {
return `Value must be longer than ${this.settings.minLength} but has a length of ${val.length}.`;
}
if (val.length > this.settings.maxLength) {
return `Value can't be longer than ${this.settings.maxLength} but has a length of ${val.length}.`;
}
}
if (values.length < this.settings.minTags) {
return `The minimum number of tags is ${this.settings.minTags} but got ${values.length}.`;
}
if (values.length > this.settings.maxTags) {
return `The maximum number of tags is ${this.settings.maxTags} but got ${values.length}.`;
}
return true;
}
/**
* Map input value to output value.
* @param value Input value.
* @return Output value.
*/
protected transform(value: string): string[] {
return this.getTags(value).filter((val) => val !== "");
}
/**
* Format output value.
* @param value Output value.
*/
protected format(value: string[]): string {
return value.join(`, `);
}
}