Merge pull request AY2324S2-CS2103T-F12-2#57 from bennyLCK/branch-b-S…

…ortArticlesByDate

Add support for parsing sort article command

src/main/java/seedu/address/logic/commands/articlecommands/SortArticleCommand.java

@@ -0,0 +1,49 @@
+package seedu.address.logic.commands.articlecommands;
+
+import static java.util.Objects.requireNonNull;
+
+import seedu.address.logic.Messages;
+import seedu.address.logic.commands.CommandResult;
+import seedu.address.logic.commands.exceptions.CommandException;
+import seedu.address.logic.parser.SortArticleCommandParser;
+import seedu.address.model.Model;
+
+/**
+ * Sorts all articles in the article book by an attribute of articles.
+ */
+public class SortArticleCommand extends ArticleCommand {
+
+    public static final String COMMAND_WORD = "sort";
+
+    public static final String COMMAND_PREFIX = "-a";
+
+    public static final String MESSAGE_SUCCESS = "sorted all articles by date";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD + " " + COMMAND_PREFIX
+            + ": sorts articles according to publication date and displays the sorted article list.\n"
+            + "Parameters: D/ (corresponds to prefix for article's publication date attribute)\n"
+            + "Example: " + COMMAND_WORD + " " + COMMAND_PREFIX + " D/";
+
+    private final String prefix;
+
+    /**
+     * @param prefix referring to an attribute of articles to sort by
+     */
+    public SortArticleCommand(String prefix) {
+        requireNonNull(prefix);
+        this.prefix = prefix;
+    }
+
+    @Override
+    public CommandResult execute(Model model) throws CommandException {
+        requireNonNull(model);
+
+        if (!SortArticleCommandParser.isAllowedPrefix(prefix)) {
+            throw new CommandException(Messages.MESSAGE_INVALID_SORTING_PREFIX);
+        }
+
+        // model.sortArticleBook(prefix);
+
+        return new CommandResult(MESSAGE_SUCCESS);
+    }
+}

src/main/java/seedu/address/logic/parser/ArticleBookParser.java

@@ -15,6 +15,7 @@
 import seedu.address.logic.commands.articlecommands.EditArticleCommand;
 import seedu.address.logic.commands.articlecommands.FindArticleCommand;
 import seedu.address.logic.commands.articlecommands.ListArticleCommand;
+import seedu.address.logic.commands.articlecommands.SortArticleCommand;
 import seedu.address.logic.parser.exceptions.ParseException;
 
 /**
@@ -66,6 +67,9 @@ public static Command parseCommand(String userInput) throws ParseException {
         case ListArticleCommand.COMMAND_WORD:
             return new ListArticleCommand();
 
+        case SortArticleCommand.COMMAND_WORD:
+            return new SortArticleCommandParser().parse(arguments);
+
         default:
             logger.finer("This user input caused a ParseException: " + userInput);
             throw new ParseException(MESSAGE_UNKNOWN_COMMAND);

src/main/java/seedu/address/logic/parser/SortArticleCommandParser.java

@@ -0,0 +1,43 @@
+package seedu.address.logic.parser;
+
+import static seedu.address.logic.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_PUBLICATION_DATE;
+
+import java.util.ArrayList;
+
+import seedu.address.logic.commands.articlecommands.SortArticleCommand;
+import seedu.address.logic.parser.exceptions.ParseException;
+
+/**
+ * Parses input arguments and creates a new SortArticleCommand object
+ */
+public class SortArticleCommandParser implements Parser<SortArticleCommand> {
+
+    private static final ArrayList<String> AllowedPrefixes = new ArrayList<>() {
+        {
+            add(PREFIX_PUBLICATION_DATE.getPrefix());
+        }
+    };
+
+    /**
+     * Checks if the given prefix is allowed in choosing an attribute for sorting.
+     */
+    public static boolean isAllowedPrefix(String prefix) {
+        return AllowedPrefixes.contains(prefix);
+    }
+
+    /**
+     * Parses the given {@code String} of arguments in the context of the SortArticleCommand
+     * and returns an SortArticleCommand object for execution.
+     * @throws ParseException if the user input does not conform the expected format
+     */
+    public SortArticleCommand parse(String args) throws ParseException {
+        String prefix = args.trim();
+        if (prefix.isEmpty() || !PREFIX_PUBLICATION_DATE.getPrefix().equals(prefix)) {
+            throw new ParseException(
+                    String.format(MESSAGE_INVALID_COMMAND_FORMAT, SortArticleCommand.MESSAGE_USAGE));
+        }
+
+        return new SortArticleCommand(prefix);
+    }
+}