# Backend: Matching

Plugin repsonsibe for finding, scoring, and matching `Profiles` for a proposing `User`. 

```mermaid
classDiagram
    MatchPlugin ..> MatchMaker : dependency
    MatchMaker  ..> ScoreKeeper : dependency
    
    class MatchPlugin {
        +String owner
        +Bigdecimal balance
        +deposit(amount)
    }
    class MatchMaker {
        +String owner
        +Bigdecimal balance
        +deposit(amount)
    }
    class ScoreKeeper {
        +String owner
        +Bigdecimal balance
        +deposit(amount)
    }
```

## Routes

### `GET /match`
```mermaid
sequenceDiagram
    participant D as db
    participant A as match:route
    participant B as match:plugin
    participant C as MatchMaker
    participant E as ScoreKeeper
    
    A->>B: START
    
    alt not cached
        B->>D: SELECT Profiles
        D-->>B: Profiles
        B->>C: send Profiles | Profile | User    
        loop Profile in Profiles
            C->>E: Profile
            E-->>C: scored Profile
        end    
        C-->>B: scored Profiles
        B->>???: scored Profiles
    else cached
        B->>???: check cache
    end
    
    
    
    ???-->>B: Profiles
    B->>A: ordered Profiles
```

### `POST /match`
```mermaid
sequenceDiagram
    participant D as db
    participant A as match:route
    participant B as match:plugin
    participant C as MatchMaker
    participant E as ScoreKeeper
    
    A->>B: START
```