code like this sequenceDiagram actor User participant UI as User Interface participant RS as Reservation Service participant BS as Book Service participant DB as Database
User->>UI: Search for book
UI->>BS: searchBooks(query)
BS->>DB: fetchBookData(query)
DB-->>BS: return book results
BS-->>UI: display search results
User->>UI: Select book to reserve
UI->>RS: createReservation(bookId, userId)
RS->>BS: checkAvailability(bookId)
BS-->>RS: return availability status
alt Book Available
RS->>DB: saveReservation(bookId, userId)
DB-->>RS: confirmation
RS-->>UI: reservation successful
else Book Unavailable
RS-->>UI: book unavailable
end
UI-->>User: Display result
Here are all the Mermaid codes in plain format like your example:
classDiagram
class User {
-String __username
-String __password
-int __attempts
+User(username, password)
+get_username() String
+set_username(username) void
+get_password() String
+set_password(password) void
+login() boolean
}
class Employee {
#String _fname
#String _lname
#String _position
-float __rate_per_hour
-int __hours_per_day
+Employee(fname, lname, position, rate_per_hour, hours_per_day)
+get_fname() String
+set_fname(fname) void
+get_lname() String
+set_lname(lname) void
+get_position() String
+set_position(position) void
+get_rate_per_hour() float
+set_rate_per_hour(rate) void
+get_hours_per_day() int
+set_hours_per_day(hours) void
+compute_salary() Dictionary
}
class PayrollSystem {
+main() void
+create_employees() List~Employee~
+generate_salary_reports() void
}
User "1" -- "1" PayrollSystem : authenticates
PayrollSystem "1" -- "0..*" Employee : managessequenceDiagram
actor Admin
participant PS as PayrollSystem
participant U as User
participant E as Employee
Admin->>PS: Start System
PS->>U: create("sar", "sar123")
PS->>U: login()
loop Login Attempts (max 3)
U->>Admin: request credentials
Admin->>U: provide username/password
alt Valid Credentials
U-->>PS: login successful
else Invalid Credentials
U->>U: increment attempts
U-->>Admin: "Invalid credentials"
end
end
alt Login Failed 3 times
U->>U: sleep(30 seconds)
U->>U: reset attempts
end
loop For 3 Employees
PS->>Admin: request employee details
Admin->>PS: provide employee data
PS->>E: create Employee object
PS->>PS: add to employees list
end
loop For each Employee
PS->>E: compute_salary()
E->>E: calculate overtime
E->>E: calculate deductions
E-->>PS: return salary details
PS->>Admin: display salary report
endgraph TD
A["Start System"] --> B["Create User Object"]
B --> C["Attempt Login"]
C --> D{"Valid Credentials?"}
D -->|No| E["Increment Attempts"]
E --> F{"Attempts < 3?"}
F -->|Yes| C
F -->|No| G["Wait 30 seconds"]
G --> H["Reset Attempts"]
H --> C
D -->|Yes| I["Login Successful"]
I --> J["Initialize Employee List"]
J --> K["Start Employee Loop (i=1)"]
K --> L["Request Employee Details"]
L --> M["Get First Name"]
M --> N["Get Last Name"]
N --> O["Get Position"]
O --> P["Get Rate per Hour"]
P --> Q["Get Hours per Day"]
Q --> R{"Valid Input?"}
R -->|No| S["Display Error"]
S --> L
R -->|Yes| T["Create Employee Object"]
T --> U["Add to Employee List"]
U --> V{"i < 3?"}
V -->|Yes| W["i = i + 1"]
W --> K
V -->|No| X["Start Salary Calculation"]
X --> Y["For Each Employee"]
Y --> Z["Calculate Regular Pay"]
Z --> AA["Calculate Overtime Pay"]
AA --> BB["Calculate Deductions"]
BB --> CC["Calculate Net Salary"]
CC --> DD["Display Salary Details"]
DD --> EE{"More Employees?"}
EE -->|Yes| Y
EE -->|No| FF["End System"]graph TB
subgraph "Actors"
A["System Administrator"]
end
subgraph "Use Cases"
UC1["Login to System"]
UC2["Add Employee Data"]
UC3["Calculate Salary"]
UC4["View Salary Report"]
UC5["Handle Login Attempts"]
UC6["Validate Input Data"]
UC7["Calculate Overtime"]
UC8["Calculate Deductions"]
end
A --> UC1
A --> UC2
A --> UC3
A --> UC4
UC1 --> UC5
UC2 --> UC6
UC3 --> UC7
UC3 --> UC8graph TB
subgraph "Authentication Module"
A["User Class"]
B["Login Validation"]
C["Attempt Tracking"]
end
subgraph "Employee Management Module"
D["Employee Class"]
E["Data Validation"]
F["Employee Storage"]
end
subgraph "Payroll Calculation Module"
G["Salary Calculator"]
H["Overtime Calculator"]
I["Deduction Calculator"]
end
subgraph "Input/Output Module"
J["User Input Handler"]
K["Report Generator"]
L["Error Handler"]
end
A --> B
A --> C
D --> E
D --> F
D --> G
G --> H
G --> I
J --> A
J --> D
K --> G
L --> EsequenceDiagram
actor Admin
participant System
participant User
Admin->>System: Start Application
System->>User: Create User Object
System->>Admin: Request Login
Admin->>User: Enter Username
Admin->>User: Enter Password
User->>User: Validate Credentials
alt Valid Login
User-->>System: Login Success
System-->>Admin: Access Granted
else Invalid Login
User->>User: Increment Attempts
User-->>Admin: Login Failed
alt Attempts < 3
User-->>Admin: Try Again
else Attempts = 3
User->>User: Wait 30 seconds
User->>User: Reset Attempts
end
endsequenceDiagram
actor Admin
participant System
participant Employee
participant Calculator
Admin->>System: Enter Employee Data
System->>Employee: Create Employee Object
System->>Calculator: Calculate Salary
Calculator->>Calculator: Calculate Regular Pay
Calculator->>Calculator: Calculate Overtime
Calculator->>Calculator: Calculate Deductions
Calculator-->>System: Return Salary Details
System-->>Admin: Display Salary ReportNow you can copy any of these codes directly and paste them into Mermaid Live Editor without any formatting issues!
about the reservation Activity Diagram can you give me a code
Here's the Mermaid code for the Library Reservation Activity Diagram:
graph TD
A["Start"] --> B["User Logs In"]
B --> C["Search for Book"]
C --> D{"Book Found?"}
D -->|No| C
D -->|Yes| E["Check Availability"]
E --> F{"Book Available?"}
F -->|No| G["Join Waiting List"]
F -->|Yes| H["Create Reservation"]
H --> I["System Updates Book Status"]
I --> J["Send Confirmation"]
G --> J
J --> K["User Receives Notification"]
K --> L["User Collects Book"]
L --> M["Return Book"]
M --> N["Update System"]
N --> O["End"]graph TD
A["Start"] --> B["User Authentication"]
B --> C{"Login Successful?"}
C -->|No| D["Display Error Message"]
D --> B
C -->|Yes| E["Display Book Catalog"]
E --> F["User Searches for Book"]
F --> G["Enter Search Criteria"]
G --> H["System Searches Database"]
H --> I{"Book Found?"}
I -->|No| J["Display 'No Results'"]
J --> F
I -->|Yes| K["Display Search Results"]
K --> L["User Selects Book"]
L --> M["Check Book Availability"]
M --> N{"Book Available?"}
N -->|No| O["Add to Waiting List"]
N -->|Yes| P["Create Reservation"]
P --> Q["Generate Reservation ID"]
Q --> R["Set Due Date"]
R --> S["Update Book Status to 'Reserved'"]
S --> T["Send Email Confirmation"]
O --> U["Notify Position in Queue"]
T --> V["User Receives Confirmation"]
U --> V
V --> W["User Goes to Library"]
W --> X["Librarian Verifies Reservation"]
X --> Y["Book Handed to User"]
Y --> Z["Update Status to 'Borrowed'"]
Z --> AA["User Uses Book"]
AA --> BB["Return Due Date Approaches"]
BB --> CC{"User Returns Book?"}
CC -->|No| DD["Send Overdue Notice"]
DD --> EE["Apply Late Fees"]
EE --> CC
CC -->|Yes| FF["Librarian Processes Return"]
FF --> GG["Update Book Status to 'Available'"]
GG --> HH["Clear Reservation Record"]
HH --> II["Notify Next User in Queue"]
II --> JJ["End"]graph TD
A["Start"] --> B["Login"]
B --> C["Search Book"]
C --> D{"Found?"}
D -->|No| C
D -->|Yes| E{"Available?"}
E -->|No| F["Join Queue"]
E -->|Yes| G["Reserve Book"]
G --> H["Get Confirmation"]
F --> H
H --> I["Collect Book"]
I --> J["Return Book"]
J --> K["End"]You can copy any of these codes and paste them directly into Mermaid Live Editor. The first one matches exactly what I showed in the original library reservation diagrams, while the other versions provide more or less detail depending on your presentation needs.
how can i explain this graph TD A["Start"] --> B["Login"] B --> C["Search Book"] C --> D{"Found?"} D -->|No| C D -->|Yes| E{"Available?"} E -->|No| F["Join Queue"] E -->|Yes| G["Reserve Book"] G --> H["Get Confirmation"] F --> H H --> I["Collect Book"] I --> J["Return Book"] J --> K["End"]