/*  Starshatter: The Open Source Project
    Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
    Copyright (c) 1997-2006, Destroyer Studios LLC.

    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    Implementation of the Reader class
*/

#include <Reader.h>

#include <cctype>
#include <cstdio>
#include <fstream>

#include <Utils.h>


Text
ConsoleReader::more()
{
    // loop until the user types something
    do {
        printPrimaryPrompt();
        fillInputBuffer();
    } while (! *p);

    return Text(p);
}


void
ConsoleReader::printPrimaryPrompt()
{
    std::printf("- ");
}


void
ConsoleReader::fillInputBuffer()
{
    std::fgets(buffer, 980, stdin);
    p = buffer;
    while (std::isspace(*p)) p++;
}


FileReader::FileReader(const char* fname) :
    filename(fname),
    done(0)
{
}


Text
FileReader::more()
{
    if (done) return Text();

    std::fstream fin(filename, std::fstream::in);

    if (!fin) {
        Print("ERROR(Parse): Could not open file '%s'\n", filename.data());
        return Text();
    }

    Text result;
    char buf[1000], newline;

    while (fin.get(buf, 1000)) {
        result.append(buf);
        fin.get(newline);
        result.append(newline);
    }

    done = 1;
    return result;
}


BlockReader::BlockReader(const char* block) :
    data((char*) block),
    done(0),
    length(0)
{
}


BlockReader::BlockReader(const char* block, int len) :
    data((char*) block),
    done(0),
    length(len)
{
}


Text
BlockReader::more()
{
    if (done) return Text();

    if (length) {
        Text result(data, length);
        done = 1;
        return result;
    }
    else if (data) {
        Text result(data);
        done = 1;
        return result;
    }

    done = 1;
    return Text();
}