Design

src/Design/Mailbox/Main.java

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+package Design.Mailbox;
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("Show All Messages");
+        SortCompareMethods.showAllMessages(SortCompareMethods.initMessageList());
+
+
+        System.out.println("Show by Tags");
+        SortCompareMethods.getAllMessagesByTag(SortCompareMethods.initMessageList(), "").forEach(System.out::println);
+
+
+        System.out.println("Show Messages From");
+        SortCompareMethods.getAllMessagesFrom(SortCompareMethods.initMessageList(), "ironmanspb@gmaill.com");
+
+
+        System.out.println("Show Messages To");
+        SortCompareMethods.getAllMessagesTo(SortCompareMethods.initMessageList(), "ironmanspb@gmaill.com");
+
+
+
+    }
+}

src/Design/Mailbox/Message.java

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+package Design.Mailbox;
+
+public class Message {
+
+    private final String from;
+    private final String to;
+    private final String content;
+    private Tags tags;
+    private Status status;
+
+
+    public Message(String from, String to, String content, Tags tags, Status status) {
+        this.from = from;
+        this.to = to;
+        this.content = content;
+        this.tags = tags;
+        this.status = status;
+    }
+
+    public String getFrom() {
+        return from;
+    }
+
+    public String getTo() {
+        return to;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public Tags getTags() {
+        return tags;
+    }
+
+    public Status getStatus() {
+        return status;
+    }
+
+    public void setTags(Tags tags) {
+        this.tags = tags;
+    }
+
+    public void setStatus(Status status) {
+        this.status = status;
+    }
+
+    @Override
+    public String toString() {
+        return "Message\n" +
+                "   from: " + from + '\n' +
+                "   to: " + to + "\n" +
+                "   tags: " + tags + '\n' +
+                "   status: " + status + "\n\n" +
+                "       " + content + '\n';
+    }
+}

src/Design/Mailbox/SortCompareMethods.java

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+package Design.Mailbox;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class SortCompareMethods {
+
+    public static List<Message> initMessageList() {
+        return Arrays.asList(
+                new Message(
+                        "windows@engage.windows.com",
+                        "sergeykovaltsov@gmail.com",
+                        "Get up and running with your new PC....",
+                        Tags.UNTAGGED,
+                        Status.SENT),
+                new Message(
+                        "noreply@stepik.org",
+                        "sergeykovaltsov@gmail.com",
+                        "Спасибо, что смотрите мои курсы по статистике!...",
+                        Tags.MARKED,
+                        Status.SENT),
+                new Message(
+                        "notify@mail.notion.so",
+                        "sergeykovaltsov@gmail.com",
+                        "Click here to log in with this magic link...",
+                        Tags.IMPORTANT,
+                        Status.SENT),
+                new Message(
+                        "no-reply@accounts.google.com",
+                        "ironmanspb@gmail.com",
+                        "Кто-то изменил пароль Вашего аккаунта Google...",
+                        Tags.UNTAGGED,
+                        Status.FAILED),
+                new Message(
+                        "ironmanspb@gmail.com",
+                        "sergeykovaltsov@gmail.com",
+                        "Проверка...",
+                        Tags.UNTAGGED,
+                        Status.DRAFT)
+        );
+    }
+
+    public static List<Message> getAllMessagesFrom (List<Message> list, String sender) {
+        return list.stream()
+                .filter(p -> p.getFrom().equals(sender))
+                .collect(Collectors.toList());
+    }
+
+    public static List<Message> getAllMessagesTo(List<Message> list, String responder) {
+        return list.stream()
+                .filter(p -> p.getTo().equals(responder))
+                .collect(Collectors.toList());
+    }
+
+    public static void showAllMessages(List<Message> messages) {
+        messages.forEach(p -> System.out.println(p.toString()));
+    }
+
+    public static List<Message> getAllMessagesByTag(List<Message> list, String tag) {
+        return list.stream().filter(p -> p.getTags().getName().equals(tag)).collect(Collectors.toList());
+    }
+
+
+
+}

src/Design/Mailbox/Status.java

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+package Design.Mailbox;
+
+public enum Status {
+
+    SENT("sent"),
+    FAILED("failed"),
+    DRAFT("draft");
+
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    Status(String name) {
+        this.name = name;
+    }
+
+
+}

src/Design/Mailbox/Tags.java

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+package Design.Mailbox;
+
+public enum Tags {
+
+        IMPORTANT("important"),
+        MARKED("marked"),
+        UNTAGGED("");
+
+        private String name;
+
+        public String getName() {
+            return name;
+        }
+
+        Tags(String name) {
+            this.name = name;
+        }
+
+
+}
+

src/Design/Youtube/Channel.java

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+package Design.Youtube;
+
+public class Channel {
+
+    private String nameChannel;
+    private boolean verified;
+    private int subscribers;
+    private boolean subscribed;
+
+    public Channel(String nameChannel, boolean verified, int subscribers, boolean subscribed) {
+        this.nameChannel = nameChannel;
+        this.verified = verified;
+        this.subscribers = subscribers;
+        this.subscribed = subscribed;
+    }
+
+    public String getNameChannel() {
+        return nameChannel;
+    }
+
+    public int getSubscribers() {
+        return subscribers;
+    }
+
+    public boolean isVerified() {
+        return verified;
+    }
+
+    public boolean isSubscribed() {
+        return subscribed;
+    }
+
+    public void switchVerified() {
+        this.verified = !verified;
+    }
+
+    public void setNameChannel(String nameChannel) {
+        this.nameChannel = nameChannel;
+    }
+
+    public void setSubscribers(int subscribers) {
+        this.subscribers = subscribers;
+    }
+
+    public void switchSubscribed() {
+        this.subscribed = !subscribed;
+    }
+}

src/Design/Youtube/Main.java

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+package Design.Youtube;
+
+
+import java.util.Comparator;
+
+public class Main {
+
+    public static void main(String[] args) {
+        System.out.println("Most liked 3 videos");
+        SortCompareMethods.getMostLikedNVideosWithLikes(SortCompareMethods.initVideoList(), 3).forEach(System.out::println);
+        System.out.println("The 5 newest videos");
+        SortCompareMethods.getTheNewestNVideosWithDate(SortCompareMethods.initVideoList(), 5).forEach(System.out::println);
+        System.out.println("The 7 most viewed videos");
+        SortCompareMethods.getTheMostViewedNVideosWithViews(SortCompareMethods.initVideoList(), 7).forEach(System.out::println);
+        System.out.println("Sort by views");
+        SortCompareMethods.sortByViews(SortCompareMethods.initVideoList()).forEach(System.out::println);
+        System.out.println("Sort by title");
+        SortCompareMethods.sortByTitle(SortCompareMethods.initVideoList()).forEach(System.out::println);
+        System.out.println("Channel and video Output");
+        SortCompareMethods.getChannelAndVideoStringList(SortCompareMethods.initVideoList()).forEach(System.out::println);
+        System.out.println("Sort by subscribers");
+        SortCompareMethods.sortVideosByChannelSubscribers(SortCompareMethods.initVideoList()).forEach(System.out::println);
+
+    }
+}