src/main/java/net/pterodactylus/sone/fcp/AbstractSoneCommand.java

   1 /*
   2  * Sone - FcpInterface.java - Copyright © 2011 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.fcp;
  19
  20 import java.util.Collection;
  21 import java.util.List;
  22
  23 import net.pterodactylus.sone.core.Core;
  24 import net.pterodactylus.sone.data.Post;
  25 import net.pterodactylus.sone.data.Reply;
  26 import net.pterodactylus.sone.data.Sone;
  27 import net.pterodactylus.sone.freenet.SimpleFieldSetBuilder;
  28 import net.pterodactylus.sone.freenet.fcp.AbstractCommand;
  29 import net.pterodactylus.sone.freenet.fcp.Command;
  30 import net.pterodactylus.sone.freenet.fcp.FcpException;
  31 import net.pterodactylus.sone.template.SoneAccessor;
  32 import net.pterodactylus.util.filter.Filters;
  33 import freenet.node.FSParseException;
  34 import freenet.support.SimpleFieldSet;
  35
  36 /**
  37  * Abstract base implementation of a {@link Command} with Sone-related helper
  38  * methods.
  39  *
  40  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  41  */
  42 public abstract class AbstractSoneCommand extends AbstractCommand {
  43
  44         /** The Sone core. */
  45         private final Core core;
  46
  47         /**
  48          * Creates a new abstract Sone FCP command.
  49          *
  50          * @param core
  51          *            The Sone core
  52          */
  53         protected AbstractSoneCommand(Core core) {
  54                 this.core = core;
  55         }
  56
  57         //
  58         // ACCESSORS
  59         //
  60
  61         /**
  62          * Returns the Sone core.
  63          *
  64          * @return The Sone core
  65          */
  66         protected Core getCore() {
  67                 return core;
  68         }
  69
  70         //
  71         // PROTECTED METHODS
  72         //
  73
  74         /**
  75          * Returns a Sone whose ID is a parameter in the given simple field set.
  76          *
  77          * @param simpleFieldSet
  78          *            The simple field set containing the ID of the Sone
  79          * @param parameterName
  80          *            The name under which the Sone ID is stored in the simple field
  81          *            set
  82          * @return The Sone
  83          * @throws FcpException
  84          *             if there is no Sone ID stored under the given parameter name,
  85          *             or if the Sone ID is invalid
  86          */
  87         protected Sone getSone(SimpleFieldSet simpleFieldSet, String parameterName) throws FcpException {
  88                 try {
  89                         String soneId = simpleFieldSet.getString(parameterName);
  90                         Sone sone = core.getSone(soneId, false);
  91                         if (sone == null) {
  92                                 throw new FcpException("Could not load Sone from “" + soneId + "”.");
  93                         }
  94                         return sone;
  95                 } catch (FSParseException fspe1) {
  96                         throw new FcpException("Could not load Sone ID from “" + parameterName + "”.", fspe1);
  97                 }
  98         }
  99
 100         /**
 101          * Returns a post whose ID is a parameter in the given simple field set.
 102          *
 103          * @param simpleFieldSet
 104          *            The simple field set containing the ID of the post
 105          * @param parameterName
 106          *            The name under which the post ID is stored in the simple field
 107          *            set
 108          * @return The post
 109          * @throws FcpException
 110          *             if there is no post ID stored under the given parameter name,
 111          *             or if the post ID is invalid
 112          */
 113         protected Post getPost(SimpleFieldSet simpleFieldSet, String parameterName) throws FcpException {
 114                 try {
 115                         String postId = simpleFieldSet.getString(parameterName);
 116                         Post post = core.getPost(postId, false);
 117                         if (post == null) {
 118                                 throw new FcpException("Could not load post from “" + postId + "”.");
 119                         }
 120                         return post;
 121                 } catch (FSParseException fspe1) {
 122                         throw new FcpException("Could not post ID from “" + parameterName + "”.", fspe1);
 123                 }
 124         }
 125
 126         /**
 127          * Creates a simple field set from the given collection of Sones.
 128          *
 129          * @param sones
 130          *            The Sones to encode
 131          * @param prefix
 132          *            The prefix for the field names (may be empty but not
 133          *            {@code null})
 134          * @return The simple field set containing the given Sones
 135          */
 136         protected SimpleFieldSet encodeSones(Collection<? extends Sone> sones, String prefix) {
 137                 SimpleFieldSetBuilder soneBuilder = new SimpleFieldSetBuilder();
 138
 139                 int soneIndex = 0;
 140                 soneBuilder.put(prefix + "Count", sones.size());
 141                 for (Sone sone : sones) {
 142                         String sonePrefix = prefix + soneIndex++ + ".";
 143                         soneBuilder.put(sonePrefix + "ID", sone.getId());
 144                         soneBuilder.put(sonePrefix + "Name", sone.getName());
 145                         soneBuilder.put(sonePrefix + "NiceName", SoneAccessor.getNiceName(sone));
 146                         soneBuilder.put(sonePrefix + "Time", sone.getTime());
 147                 }
 148
 149                 return soneBuilder.get();
 150         }
 151
 152         /**
 153          * Creates a simple field set from the given post.
 154          *
 155          * @param post
 156          *            The post to encode
 157          * @param prefix
 158          *            The prefix for the field names (may be empty but not
 159          *            {@code null})
 160          * @param includeReplies
 161          *            {@code true} to include replies, {@code false} to not include
 162          *            replies
 163          * @return The simple field set containing the post
 164          */
 165         protected SimpleFieldSet encodePost(Post post, String prefix, boolean includeReplies) {
 166                 SimpleFieldSetBuilder postBuilder = new SimpleFieldSetBuilder();
 167
 168                 postBuilder.put(prefix + "ID", post.getId());
 169                 postBuilder.put(prefix + "Sone", post.getSone().getId());
 170                 if (post.getRecipient() != null) {
 171                         postBuilder.put(prefix + "Recipient", post.getRecipient().getId());
 172                 }
 173                 postBuilder.put(prefix + "Time", post.getTime());
 174                 postBuilder.put(prefix + "Text", post.getText());
 175                 postBuilder.put(encodeLikes(core.getLikes(post), prefix + "Likes."));
 176
 177                 if (includeReplies) {
 178                         List<Reply> replies = core.getReplies(post);
 179                         postBuilder.put(encodeReplies(replies, prefix));
 180                 }
 181
 182                 return postBuilder.get();
 183         }
 184
 185         /**
 186          * Creates a simple field set from the given collection of posts.
 187          *
 188          * @param posts
 189          *            The posts to encode
 190          * @param prefix
 191          *            The prefix for the field names (may be empty but not
 192          *            {@code null})
 193          * @param includeReplies
 194          *            {@code true} to include the replies, {@code false} to not
 195          *            include the replies
 196          * @return The simple field set containing the posts
 197          */
 198         protected SimpleFieldSet encodePosts(Collection<? extends Post> posts, String prefix, boolean includeReplies) {
 199                 SimpleFieldSetBuilder postBuilder = new SimpleFieldSetBuilder();
 200
 201                 int postIndex = 0;
 202                 postBuilder.put(prefix + "Count", posts.size());
 203                 for (Post post : posts) {
 204                         String postPrefix = prefix + postIndex++;
 205                         postBuilder.put(encodePost(post, postPrefix + ".", includeReplies));
 206                         if (includeReplies) {
 207                                 postBuilder.put(encodeReplies(Filters.filteredList(core.getReplies(post), Reply.FUTURE_REPLIES_FILTER), postPrefix + "."));
 208                         }
 209                 }
 210
 211                 return postBuilder.get();
 212         }
 213
 214         /**
 215          * Creates a simple field set from the given collection of replies.
 216          *
 217          * @param replies
 218          *            The replies to encode
 219          * @param prefix
 220          *            The prefix for the field names (may be empty, but not
 221          *            {@code null})
 222          * @return The simple field set containing the replies
 223          */
 224         protected SimpleFieldSet encodeReplies(Collection<? extends Reply> replies, String prefix) {
 225                 SimpleFieldSetBuilder replyBuilder = new SimpleFieldSetBuilder();
 226
 227                 int replyIndex = 0;
 228                 replyBuilder.put(prefix + "Replies.Count", replies.size());
 229                 for (Reply reply : replies) {
 230                         String replyPrefix = prefix + "Replies." + replyIndex++ + ".";
 231                         replyBuilder.put(replyPrefix + "ID", reply.getId());
 232                         replyBuilder.put(replyPrefix + "Sone", reply.getSone().getId());
 233                         replyBuilder.put(replyPrefix + "Time", reply.getTime());
 234                         replyBuilder.put(replyPrefix + "Text", reply.getText());
 235                 }
 236
 237                 return replyBuilder.get();
 238         }
 239
 240         /**
 241          * Creates a simple field set from the given collection of Sones that like
 242          * an element.
 243          *
 244          * @param likes
 245          *            The liking Sones
 246          * @param prefix
 247          *            The prefix for the field names (may be empty but not
 248          *            {@code null})
 249          * @return The simple field set containing the likes
 250          */
 251         protected SimpleFieldSet encodeLikes(Collection<? extends Sone> likes, String prefix) {
 252                 SimpleFieldSetBuilder likesBuilder = new SimpleFieldSetBuilder();
 253
 254                 int likeIndex = 0;
 255                 likesBuilder.put(prefix + "Count", likes.size());
 256                 for (Sone sone : likes) {
 257                         String sonePrefix = prefix + likeIndex++ + ".";
 258                         likesBuilder.put(sonePrefix + "ID", sone.getId());
 259                 }
 260
 261                 return likesBuilder.get();
 262         }
 263
 264 }