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import { hasBrackets, matchesContextTitle } from "../cross_runtime_helpers.ts";
/** * Write The Collected Data to a File * * Called once the line-reader has reached the end of the file, to * then write the contexts collected to a file * @param {string[]} dataToWrite Array holding every line found for all contexts asked for * @param {string} fileToWriteTo The file to write to */function writeToFile(dataToWrite: string[], fileToWriteTo: string): void {  Deno.writeFileSync(    Deno.cwd() + "/" + fileToWriteTo,    new TextEncoder().encode(dataToWrite.join("\n")),  );}
export const helpMessage: string = "\n" +  "Extracts context blocks from a configuration file." +  "\n" +  "\n" +  "USAGE:" +  "\n" +  "    deno run --allow-read --allow-write https://deno.land.com/ebebbington/context_finder/mod.ts <file to read> <file to write> <...contexts>" +  "\n" +  "\n" +  "EXAMPLE USAGE:" +  "\n" +  "    deno run --allow-read --allow-write https://deno.land/x/context-finder/mod.ts read.conf write.conf user admin" +  "\n";
/** * Read the File and Write to a New One * * The main function. Read a file line by line, checking if a context exists that matches * the list given. If it matches then the line-reader will save the whole * context block and repeat the process for reaching a new block. * Every other function is abstracted. * * @param {string[]} contextTitles The contexts to grab matching any of these values given from the CL * @param {string} fileToRead The file to read with the contexts * @param {string} fileToWriteTo The file to write to */export function contextFinder(  contextTitles: string[],  fileToRead: string,  fileToWriteTo: string,): void {  // Variables that we don't want redeclared  let isContextWeNeed = false; // used to tell the line reader when we are in a context block we want to copy  const dataToWrite: string[] = []; // to hold the data found  const decoder = new TextDecoder();  const configFileContents =    (decoder.decode(Deno.readFileSync(Deno.cwd() + "/" + fileToRead))).split(      "\n",    );
  //Start the loop of reading each line of the file  configFileContents.forEach((lineText: string, i) => {    // Check the current line for brackets and matching titles    const lineHasBrackets = hasBrackets(lineText);    const LineMatchesTitle = matchesContextTitle(lineText, contextTitles);
    // Tell the script we are in a context we want if we've reached a context we want    if (lineHasBrackets && LineMatchesTitle) {      isContextWeNeed = true;    }
    // Tell the script to stop extracting if reached a context we dont need    if (lineHasBrackets && !LineMatchesTitle) {      isContextWeNeed = false;    }
    // Pull data if we are reading a context we need    if (isContextWeNeed) {      dataToWrite.push(lineText);    }
    // Write to the file if we've reached the end of the file and there is data to write    const isLastLine = configFileContents[i] ? true : false;    if (isLastLine && dataToWrite.length > 0) {      writeToFile(dataToWrite, fileToWriteTo);    }  });}