Prelab 4

Prelab Tasks

1) Fundamental Use Cases → Key Classes

Use Case A: Route Planning (Static Blueprint)

Key classes

• User
• MobilityProfile
• Location
• RouteRequest
• Route
• RouteSegment
• RoutingEngine

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Use Case B: Volunteer Accessibility Reporting

Key classes

• User
• ObstacleReport
• PhotoEvidence
• Location
• ReportService

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Use Case C: Municipality Resolution & Citizen Validation

Key classes

• User (Authority role)
• ResolutionUpdate
• ValidationVote
• ObstacleReport
• NotificationService
• IssueLifecycleService

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2) Elementary Class Design

User

Fields

• userId
• name
• email
• role (Guest, Citizen, Authority, Admin)
• trustScore

Methods

• register()
• login()
• logout()

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MobilityProfile

Fields

• profileId
• userId
• primaryAid (Wheelchair, Cane, None)
• avoidStairs
• maxSlope

Methods

• updatePreferences()

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Location

Fields

• latitude
• longitude
• address

Methods

• distanceTo(otherLocation)

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ObstacleReport

Fields

• reportId
• reporterId
• location
• category
• description
• status (Unverified, Confirmed, Passive, Resolved)

Methods

• addPhoto()
• upvote()
• flag()
• markResolved()

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PhotoEvidence

Fields

• photoId
• reportId
• url
• uploadDate

Methods

• validatePhoto()

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ResolutionUpdate

Fields

• updateId
• reportId
• authorityId
• afterPhotoUrl
• notes

Methods

• publish()

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ValidationVote

Fields

• voteId
• reportId
• voterId
• voteType (Confirm, Reject)

Methods

• submitVote()

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RouteRequest

Fields

• requestId
• startLocation
• destinationLocation

Methods

• validateRequest()

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Route

Fields

• routeId
• segments
• totalDistance
• estimatedTime

Methods

• summarize()

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RouteSegment

Fields

• fromLocation
• toLocation
• streetName
• slope

Methods

• isAccessible()

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3) Elementary Class Diagram (Mermaid)

classDiagram

User --> MobilityProfile
User --> ObstacleReport
ObstacleReport --> Location
ObstacleReport --> PhotoEvidence
ObstacleReport --> ValidationVote
ObstacleReport --> ResolutionUpdate

RouteRequest --> Location
Route --> RouteSegment
RouteSegment --> Location

ReportService --> ObstacleReport
RoutingEngine --> Route
NotificationService --> User
IssueLifecycleService --> ObstacleReport

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