Sequence Diagrams

Search Post

sequenceDiagram
    participant RegisteredUser
    participant SearchEngine
    participant WikiData
    participant ContentController
    participant Database

    Activate RegisteredUser

    RegisteredUser ->> SearchEngine : search keyword, createFilter()
    Activate SearchEngine

    SearchEngine ->> WikiData : query(keyword)
    Activate WikiData

    WikiData -->> SearchEngine : return List<WikiData_Entity>
    Deactivate WikiData

    SearchEngine ->> RegisteredUser : ask for WikiData_Entity selection

    RegisteredUser -->> SearchEngine : selected WikiData_Entity

    SearchEngine ->> WikiData : get_keywords(WikiData_Entity)
    Activate WikiData

    WikiData ->> SearchEngine : return new_keyword_list<keyword>
    Deactivate WikiData

    SearchEngine ->> ContentController : find(new_keyword_list)
    Activate ContentController
    ContentController->> Database: get matching content
    Activate Database
    Database -->> ContentController : return List<Post>
    Deactivate Database
    ContentController -->> SearchEngine : return List<Post>
    Deactivate ContentController


    SearchEngine ->> RegisteredUser : filter(post_list, filter)
    Deactivate SearchEngine
    Deactivate RegisteredUser

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View Post

sequenceDiagram
Registered User->>ContentController: getPost(post)
ContentController->>+Database: retrieve post from database
Database-->>ContentController: post
alt success
    ContentController->>Wikidata: getInfoBox(qid: String)
    Wikidata-->>ContentController: success
    ContentController-->>Registered User: success
else failure
    Database-->>-ContentController: failure
    ContentController-->>Registered User: failure
end

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Bookmark Post

sequenceDiagram
    Registered User->>+ContentController: getPost(post_id)
    ContentController->>+ Database: get post
    Activate Registered User
    alt saving is successful
        Database-->>ContentController: Post
        ContentController-->>Registered User: Post
        Registered User->>ContentController: bookmarkPost(post)
        ContentController->>+ Database: save bookmark action into database
        Database-->>ContentController: success
        ContentController-->>Registered User: success
    else failure
        Database-->>-ContentController: failure
        ContentController-->>-Registered User: failure
    end
    Deactivate Registered User

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Block User

sequenceDiagram
    Registered User->>+ UserController: getUser(username)
    Activate Registered User
    UserController->>+ Database: get user profile
    alt user blocking is successful
        Database-->>UserController: profile
        UserController -->> Registered User: profile
        Registered User->> UserController: blockUser(username)
        UserController->> Database: save the block action
        Database-->>UserController: success
        UserController -->> Registered User: success

    else failure
        Database-->>-UserController: failure
        UserController-->>-Registered User: failure
    end    
    Deactivate Registered User

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Reset Password

sequenceDiagram
    Registered User->>+ UserController: login(username: String, password: String) 
    Activate Registered User
    UserController->>+ Database: verify credentials
    alt reset password is successful
        Database-->>UserController: success
        UserController -->> Registered User: success
        Registered User->> UserController: update(password)
        UserController->> Database: save the reset action
        Database-->>UserController: success
        UserController -->> Registered User: success

    else failure
        Database-->>-UserController: failure
        UserController-->>-Registered User: failure
    end    
    Deactivate Registered User

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Like Post

sequenceDiagram
    Registered User->>+ContentController: getPost(post_id)
    ContentController->>+ Database: get post
    Activate Registered User
    alt saving is successful
        Database-->>ContentController: Post
        ContentController-->>Registered User: Post
        Registered User->>ContentController: likePost(post)
        ContentController->>+ Database: save like action into database
        Database-->>ContentController: success
        ContentController-->>Registered User: success
    else failure
        Database-->>-ContentController: failure
        ContentController-->>-Registered User: failure
    end
    Deactivate Registered User

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Follow User

sequenceDiagram
    Registered User->>+ ProfileController: getProfile(username)
    ProfileController->>+ Database: get profile
    Activate Registered User
    alt user followed successfully
        Database-->>ProfileController: Profile
        ProfileController -->> Registered User: Profile
        Registered User->> ProfileController: followUser(profile)
        ProfileController->>+ Database: save the follow action

        Database-->>ProfileController: success
        ProfileController -->> Registered User: success
    else failure
        Database-->>-ProfileController: failure
        ProfileController-->>-Registered User: failure
    end

    Deactivate Registered User

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Create Post

sequenceDiagram
    Registered User->>+Feed: populateFeed()
    Feed->>+ Database: get posts 
    Activate Registered User
    alt saving is successful
        Database-->>Feed: Post list
        Feed-->>Registered User: Post list
        Registered User->>+Feed: create(text: String, author: RegisteredUser, title: String, image: Image)
        Feed->>+ Database: save create action into database
        Database-->>Feed: success
        Feed-->>Registered User: success
    else failure
        Database-->>-Feed: failure
        Feed-->>-Registered User: failure
    end
    Deactivate Registered User

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Update Profile

sequenceDiagram
    Registered User->>+ ProfileController: getProfile(username)
    ProfileController->>+ Database: get profile
    Activate Registered User
    alt profile updated successfully
        Database-->>ProfileController: Profile
        ProfileController -->> Registered User: Profile
        Registered User->> ProfileController: update(profile)
        ProfileController->>+ Database: save the new profile action

        Database-->>ProfileController: success
        ProfileController -->> Registered User: success
    else failure
        Database-->>-ProfileController: failure
        ProfileController-->>-Registered User: failure
    end

    Deactivate Registered User

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