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streamReader.h
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streamReader.h
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#pragma once
#include "nanoCommon.h"
#include "badjson.h"
#include "commandLine.h"
#include "mockStream.h"
#include "slices.h"
namespace mqtt5nano {
/** This is just another implementation of
* the Usual Serial.read() that buffers the bytes up
* until there's a whole command.
* And then it parses the line into words and then passes it to the commands.
*/
struct streamReader {
ByteCollector ourBuffer;
Stream *sP;
StreamDestination adrain;
static const int readBufferSize = 1024;
char readbuffer[readBufferSize];
streamReader() {
setup();
}
void setup() {
ourBuffer.base = readbuffer;
ourBuffer.start = 0;
ourBuffer.end = readBufferSize;
readbuffer[readBufferSize - 1] = 0;
}
// streamReader(char *buffer, int bufflen)
// {
// ourBuffer.base = readbuffer;
// ourBuffer.start = 0;
// ourBuffer.end = readBufferSize;
// buffer[readBufferSize - 1] = 0;
// }
virtual slice haveEnough() {
if (ourBuffer.start) {
char c = ourBuffer.base[ourBuffer.start - 1];
if (c == '\n' || c == '\r') {
slice newSlice(ourBuffer.base, 0, ourBuffer.start - 1); // don't pass the \n
ourBuffer.start = 0; // reset the buffer
return newSlice;
}
}
return slice();
}
virtual void execute(slice cmd) // override me ? FIXME: use the layers pattern
{
// sP->print("received command: ");
// sP->println(cmd.base);
badjson::ResultsTriplette chopped = badjson::Chop(cmd.base + cmd.start, cmd.size());
if (chopped.error == nullptr) { // process command line
bool pretendEncrypted = true;
Command::process(chopped.segment, nullptr, adrain, CommandSource::SerialPort, pretendEncrypted);
adrain.print("\n");
} else {
adrain.write(chopped.error);
adrain.write("\n");
}
delete chopped.segment;
}
void loop(long now, class Stream &s) {
sP = &s;
adrain.setStream(s);
while (s.available()) {
// fixme call pipeline aka layers?
char c = s.read();
ourBuffer.writeByte(c);
slice cmd = haveEnough();
if (!cmd.empty()) {
moreScrambled(now);
execute(cmd);
}
}
}
};
}
// Copyright 2022 Alan Tracey Wootton
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.