anote

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import { Keywords } from "../flows/Keywords";
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import { appendFile, getBuffer, readFile } from "../utils/Util";
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import { Command } from "./Command";
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export class Echo extends Command {
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    async execute(): Promise<string | null> {
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        if(!this.isValid(Keywords.ECHO)) return `Wrong sintax of ${Keywords.ECHO}`;
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        if(this.isAddable()){
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            const fileData: string = await this.storage.downloadFromBuffer(this.getFileName());
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            await this.storage.uploadBuffer(this.getFileName(), fileData + "\n" + this.getValue(), "");
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            return `${this.getFileName()} is updated`;
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        }
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        return this.getValue();
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    }
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    isValid(keyword: Keywords): boolean {
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        if(!this.getCurrentText().startsWith(keyword) ||
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            this.getCurrentText().length < 6 ||
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            this.getCurrentText().split(" ").length < 1 ||
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            this.getValue() === null
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          ) return false;
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        return true;
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    }
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    getValue(): string | null {
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        const matched: string[] | null = this.getTail().match(/(["'])(?:(?=(\\?))\2.)*?\1/);
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        return matched ? matched[0].slice(1, -1) : null;
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    }
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    isAddable(): boolean {
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        return this.getCurrentText().includes(">>");
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    }
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    getFileName(): string {
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        return this.getCurrentText().split(">>")[1].trim();
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    }
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    getFileNameNoPath(): string {
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        const lastIndex: number = this.getFileName().lastIndexOf("/");
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        return lastIndex === -1 ? this.getFileName() : this.getFileName().substring(lastIndex, this.getTail().length - 1);
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    }
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}