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arduino-cli/libraries/Adafruit_MQTT_Library/Adafruit_MQTT_FONA.h

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+// The MIT License (MIT)
+//
+// Copyright (c) 2015 Adafruit Industries
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+#ifndef _ADAFRUIT_MQTT_FONA_H_
+#define _ADAFRUIT_MQTT_FONA_H_
+
+#include "Adafruit_MQTT.h"
+#include <Adafruit_FONA.h>
+
+#define MQTT_FONA_INTERAVAILDELAY 100
+#define MQTT_FONA_QUERYDELAY 500
+
+// FONA-specific version of the Adafruit_MQTT class.
+// Note that this is defined as a header-only class to prevent issues with using
+// the library on non-FONA platforms (since Arduino will include all .cpp files
+// in the compilation of the library).
+class Adafruit_MQTT_FONA : public Adafruit_MQTT {
+public:
+  Adafruit_MQTT_FONA(Adafruit_FONA *f, const char *server, uint16_t port,
+                     const char *cid, const char *user, const char *pass)
+      : Adafruit_MQTT(server, port, cid, user, pass), fona(f) {}
+
+  Adafruit_MQTT_FONA(Adafruit_FONA *f, const char *server, uint16_t port,
+                     const char *user = "", const char *pass = "")
+      : Adafruit_MQTT(server, port, user, pass), fona(f) {}
+
+  bool connected() {
+    // Return true if connected, false if not connected.
+    return fona->TCPconnected();
+  }
+
+protected:
+  bool connectServer() override {
+    char server[40];
+    strncpy(server, servername, 40);
+#ifdef ADAFRUIT_SLEEPYDOG_H
+    Watchdog.reset();
+#endif
+
+    // connect to server
+    DEBUG_PRINTLN(F("Connecting to TCP"));
+    return fona->TCPconnect(server, portnum);
+  }
+
+  bool disconnectServer() override { return fona->TCPclose(); }
+
+  uint16_t readPacket(uint8_t *buffer, uint16_t maxlen,
+                      int16_t timeout) override {
+    uint8_t *buffp = buffer;
+    DEBUG_PRINTLN(F("Reading data.."));
+
+    if (!fona->TCPconnected())
+      return 0;
+
+    /* Read data until either the connection is closed, or the idle timeout is
+     * reached. */
+    uint16_t len = 0;
+    int16_t t = timeout;
+    uint16_t avail;
+
+    while (fona->TCPconnected() && (timeout >= 0)) {
+      // DEBUG_PRINT('.');
+      while (avail = fona->TCPavailable()) {
+        // DEBUG_PRINT('!');
+
+        if (len + avail > maxlen) {
+          avail = maxlen - len;
+          if (avail == 0)
+            return len;
+        }
+
+        // try to read the data into the end of the pointer
+        if (!fona->TCPread(buffp, avail))
+          return len;
+
+        // read it! advance pointer
+        buffp += avail;
+        len += avail;
+        timeout = t; // reset the timeout
+
+        // DEBUG_PRINTLN((uint8_t)c, HEX);
+
+        if (len == maxlen) { // we read all we want, bail
+          DEBUG_PRINT(F("Read:\t"));
+          DEBUG_PRINTBUFFER(buffer, len);
+          return len;
+        }
+      }
+#ifdef ADAFRUIT_SLEEPYDOG_H
+      Watchdog.reset();
+#endif
+      timeout -= MQTT_FONA_INTERAVAILDELAY;
+      timeout -= MQTT_FONA_QUERYDELAY; // this is how long it takes to query the
+                                       // FONA for avail()
+      delay(MQTT_FONA_INTERAVAILDELAY);
+    }
+
+    return len;
+  }
+
+  bool sendPacket(uint8_t *buffer, uint16_t len) override {
+    DEBUG_PRINTLN(F("Writing packet"));
+    if (fona->TCPconnected()) {
+      boolean ret = fona->TCPsend((char *)buffer, len);
+      // DEBUG_PRINT(F("sendPacket returned: ")); DEBUG_PRINTLN(ret);
+      if (!ret) {
+        DEBUG_PRINTLN("Failed to send packet.");
+        return false;
+      }
+    } else {
+      DEBUG_PRINTLN(F("Connection failed!"));
+      return false;
+    }
+    return true;
+  }
+
+private:
+  uint32_t serverip;
+  Adafruit_FONA *fona;
+};
+
+#endif