Data Models

AppConfig Hierarchy

AppConfig is the root configuration object, persisted as config.json:

graph TB
    AppConfig["AppConfig"]
    GlobalSettings["GlobalSettings<br/>Global settings"]
    BackupConfigs["BackupConfig[]<br/>Backup configuration collection"]
    ConfigTemplates["ConfigTemplate[]<br/>Configuration template collection"]

    AppConfig --> GlobalSettings
    AppConfig --> BackupConfigs
    AppConfig --> ConfigTemplates

    BackupConfig["BackupConfig"]
    ManagedFolder["ManagedFolder[]<br/>Source folders"]
    ArchiveSettings["ArchiveSettings<br/>Archive settings"]
    AutomationSettings["AutomationSettings<br/>Automation settings"]
    FilterSettings["FilterSettings<br/>Filter rules"]
    CloudSettings["CloudSettings<br/>Cloud sync settings"]
    ScheduleEntries["ScheduleEntry[]<br/>Scheduled tasks"]

    BackupConfigs --> BackupConfig
    BackupConfig --> ManagedFolder
    BackupConfig --> ArchiveSettings
    BackupConfig --> AutomationSettings
    BackupConfig --> FilterSettings
    BackupConfig --> CloudSettings
    BackupConfig --> ScheduleEntries

Core Model Descriptions

AppConfig

Root configuration object containing global settings and all backup configurations.

BackupConfig

A single backup configuration describing the complete rules for a backup task:

• ManagedFolder[]: List of source folders to back up
• ArchiveSettings: Compression format, encryption options, output path
• AutomationSettings: Trigger conditions for automatic backups
• FilterSettings: File inclusion/exclusion rules (FileTypeRule[])
• CloudSettings: rclone cloud sync configuration
• ScheduleEntry[]: Scheduled task entries

GlobalSettings

Application-level global settings: language, theme, keyboard shortcuts, startup behavior, etc.

ManagedFolder

A single source folder: path, enabled state, last modified time.

Incremental Backup Metadata

Incremental backups use a separate metadata structure to track file changes:

Model	Responsibility
BackupMetadata	Metadata for a single incremental backup
BackupMetadataState	Metadata state (complete / part of an incremental chain)
BackupChangeRecord	Change record for a single file
FileState	File state (added / modified / deleted / unchanged)

History and Tasks

Model	Responsibility
HistoryItem	A single backup history entry (timestamp, size, mode, status)
BackupTask	A running backup task (progress, status, error info)

Serialization

• All models are serialized to JSON using System.Text.Json
• AppJsonContext (source generator context) registers all serializable types for AOT compatibility
• Configuration migration logic handles automatic conversion from legacy JSON formats to the current version

All model definitions are located in Models/BackupModels.cs (approximately 1300 lines); incremental metadata is in Models/BackupMetadata.cs.