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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.plclogo.internal.handler;
  14
  15 import static org.openhab.binding.plclogo.internal.PLCLogoBindingConstants.*;
  16
  17 import java.util.HashMap;
  18 import java.util.Map;
  19
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.eclipse.jdt.annotation.Nullable;
  22 import org.openhab.binding.plclogo.internal.PLCLogoBindingConstants;
  23 import org.openhab.binding.plclogo.internal.PLCLogoBindingConstants.Layout;
  24 import org.openhab.binding.plclogo.internal.PLCLogoClient;
  25 import org.openhab.core.thing.Bridge;
  26 import org.openhab.core.thing.Channel;
  27 import org.openhab.core.thing.Thing;
  28 import org.openhab.core.thing.ThingStatus;
  29 import org.openhab.core.thing.ThingStatusDetail;
  30 import org.openhab.core.thing.binding.BaseThingHandler;
  31 import org.openhab.core.thing.binding.BridgeHandler;
  32 import org.openhab.core.thing.binding.builder.ThingBuilder;
  33 import org.openhab.core.types.State;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 /**
  38  * The {@link PLCCommonHandler} is responsible for handling commands, which are
  39  * sent to one of the channels.
  40  *
  41  * @author Alexander Falkenstern - Initial contribution
  42  */
  43 @NonNullByDefault
  44 public abstract class PLCCommonHandler extends BaseThingHandler {
  45
  46     public static final int INVALID = Integer.MAX_VALUE;
  47
  48     private final Logger logger = LoggerFactory.getLogger(PLCCommonHandler.class);
  49
  50     private Map<String, @Nullable State> oldValues = new HashMap<>();
  51
  52     private @Nullable PLCLogoClient client;
  53     private String family = NOT_SUPPORTED;
  54
  55     /**
  56      * Constructor.
  57      */
  58     public PLCCommonHandler(Thing thing) {
  59         super(thing);
  60     }
  61
  62     @Override
  63     public void initialize() {
  64         synchronized (oldValues) {
  65             oldValues.clear();
  66         }
  67         scheduler.execute(this::doInitialization);
  68     }
  69
  70     @Override
  71     public void dispose() {
  72         logger.debug("Dispose LOGO! common block handler.");
  73         super.dispose();
  74
  75         ThingBuilder tBuilder = editThing();
  76         for (Channel channel : getThing().getChannels()) {
  77             tBuilder.withoutChannel(channel.getUID());
  78         }
  79         updateThing(tBuilder.build());
  80
  81         synchronized (oldValues) {
  82             oldValues.clear();
  83         }
  84
  85         family = NOT_SUPPORTED;
  86         client = null;
  87     }
  88
  89     /**
  90      * Return data buffer start address to read/write dependent on configured Logo! family.
  91      *
  92      * @return Start address of data buffer
  93      */
  94     public int getStartAddress() {
  95         String kind = getBlockKind();
  96         String family = getLogoFamily();
  97         logger.debug("Get start address of {} LOGO! for {} blocks.", family, kind);
  98
  99         Map<?, Layout> memory = LOGO_MEMORY_BLOCK.get(family);
 100         Layout layout = (memory != null) ? memory.get(kind) : null;
 101         return layout != null ? layout.address : INVALID;
 102     }
 103
 104     /**
 105      * Return data buffer length to read/write dependent on configured Logo! family.
 106      *
 107      * @return Length of data buffer in bytes
 108      */
 109     public int getBufferLength() {
 110         String kind = getBlockKind();
 111         String family = getLogoFamily();
 112         logger.debug("Get data buffer length of {} LOGO! for {} blocks.", family, kind);
 113
 114         Map<?, Layout> memory = LOGO_MEMORY_BLOCK.get(family);
 115         Layout layout = (memory != null) ? memory.get(kind) : null;
 116         return layout != null ? layout.length : 0;
 117     }
 118
 119     /**
 120      * Update value channel of current thing with new data.
 121      *
 122      * @param data Data value to update with
 123      */
 124     public abstract void setData(final byte[] data);
 125
 126     /**
 127      * Checks if block name is valid.
 128      *
 129      * @param name Name of the LOGO! block to check
 130      * @return True, if the name is valid and false otherwise
 131      */
 132     protected abstract boolean isValid(final String name);
 133
 134     /**
 135      * Returns configured block kind.
 136      *
 137      * @return Configured block kind
 138      */
 139     protected abstract String getBlockKind();
 140
 141     /**
 142      * Return number of channels dependent on configured Logo! family.
 143      *
 144      * @return Number of channels
 145      */
 146     protected abstract int getNumberOfChannels();
 147
 148     /**
 149      * Calculate address for the block with given name.
 150      *
 151      * @param name Name of the LOGO! block
 152      * @return Calculated address
 153      */
 154     protected int getAddress(final String name) {
 155         int address = INVALID;
 156
 157         logger.debug("Get address of {} LOGO! for block {} .", getLogoFamily(), name);
 158
 159         int base = getBase(name);
 160         if (isValid(name) && (base != INVALID)) {
 161             String block = name.split("\\.")[0];
 162             if (Character.isDigit(block.charAt(1))) {
 163                 address = Integer.parseInt(block.substring(1));
 164             } else if (Character.isDigit(block.charAt(2))) {
 165                 address = Integer.parseInt(block.substring(2));
 166             } else if (Character.isDigit(block.charAt(3))) {
 167                 address = Integer.parseInt(block.substring(3));
 168             }
 169         } else {
 170             logger.info("Wrong configurated LOGO! block {} found.", name);
 171         }
 172
 173         return address;
 174     }
 175
 176     /**
 177      * Calculate address offset for given block name.
 178      *
 179      * @param name Name of the data block
 180      * @return Calculated address offset
 181      */
 182     protected int getBase(final String name) {
 183         Layout layout = null;
 184         String family = getLogoFamily();
 185
 186         logger.debug("Get base address of {} LOGO! for block {} .", family, name);
 187
 188         String block = name.split("\\.")[0];
 189         Map<?, Layout> memory = LOGO_MEMORY_BLOCK.get(family);
 190         if (isValid(name) && !block.isEmpty() && (memory != null)) {
 191             if (Character.isDigit(block.charAt(1))) {
 192                 layout = memory.get(block.substring(0, 1));
 193             } else if (Character.isDigit(block.charAt(2))) {
 194                 layout = memory.get(block.substring(0, 2));
 195             } else if (Character.isDigit(block.charAt(3))) {
 196                 layout = memory.get(block.substring(0, 3));
 197             }
 198         }
 199
 200         return layout != null ? layout.address : INVALID;
 201     }
 202
 203     /**
 204      * Checks if thing handler is valid and online.
 205      *
 206      * @return True, if handler is valid and false otherwise
 207      */
 208     protected boolean isThingOnline() {
 209         Bridge bridge = getBridge();
 210         if (bridge != null) {
 211             Thing thing = getThing();
 212             return ((ThingStatus.ONLINE == bridge.getStatus()) && (ThingStatus.ONLINE == thing.getStatus()));
 213         }
 214         return false;
 215     }
 216
 217     protected @Nullable State getOldValue(final String name) {
 218         synchronized (oldValues) {
 219             return oldValues.get(name);
 220         }
 221     }
 222
 223     protected void setOldValue(final String name, final @Nullable State value) {
 224         synchronized (oldValues) {
 225             if (!NOT_SUPPORTED.equalsIgnoreCase(name)) {
 226                 oldValues.put(name, value);
 227             } else {
 228                 logger.info("Wrong configurated LOGO! block {} found.", name);
 229             }
 230         }
 231     }
 232
 233     /**
 234      * Returns configured LOGO! communication client.
 235      *
 236      * @return Configured LOGO! client
 237      */
 238     protected @Nullable PLCLogoClient getLogoClient() {
 239         return client;
 240     }
 241
 242     protected @Nullable PLCBridgeHandler getBridgeHandler() {
 243         Bridge bridge = getBridge();
 244         if (bridge != null) {
 245             BridgeHandler handler = bridge.getHandler();
 246             if ((handler != null) && (handler instanceof PLCBridgeHandler)) {
 247                 return (PLCBridgeHandler) handler;
 248             }
 249         }
 250         return null;
 251     }
 252
 253     /**
 254      * Returns configured LOGO! family.
 255      *
 256      * @see PLCLogoBindingConstants#LOGO_0BA7
 257      * @see PLCLogoBindingConstants#LOGO_0BA8
 258      * @return Configured LOGO! family
 259      */
 260     protected String getLogoFamily() {
 261         return family;
 262     }
 263
 264     /**
 265      * Perform thing initialization.
 266      */
 267     protected void doInitialization() {
 268         PLCBridgeHandler handler = getBridgeHandler();
 269         if (handler != null) {
 270             family = handler.getLogoFamily();
 271             client = handler.getLogoClient();
 272             if ((client == null) || NOT_SUPPORTED.equalsIgnoreCase(family)) {
 273                 String message = "Can not initialize LOGO! block handler.";
 274                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, message);
 275
 276                 Thing thing = getThing();
 277                 logger.warn("Can not initialize thing {} for LOGO! {}.", thing.getUID(), thing.getBridgeUID());
 278             }
 279         }
 280     }
 281
 282     protected static String getBlockFromChannel(final @Nullable Channel channel) {
 283         if (channel == null) {
 284             return NOT_SUPPORTED;
 285         }
 286         String block = channel.getProperties().get(BLOCK_PROPERTY);
 287         return block == null ? NOT_SUPPORTED : block;
 288     }
 289 }