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= OpenSimulator Internals/Code Map/ROBUST/AgentPreferencesService =

== Overview ==

AgentPreferencesService stores per-user viewer preferences: language, hover height, access tier, and default creation permissions. It is a thin wrapper over a single database table.

Source files:

OpenSim/Services/UserAccountService/AgentPreferencesService.cs
OpenSim/Services/UserAccountService/AgentPreferencesServiceBase.cs

Note: these files live in the UserAccountService directory, not a separate AgentPreferencesService directory.

----

=== Constructor and Config Loading ===

AgentPreferencesServiceBase(IConfigSource config)

Config is read in two layers; [AgentPreferencesService] overrides [DatabaseService]. Unlike other services, [AgentPreferencesService] is required -- the constructor throws if the section is absent.

{| class="wikitable"
! Section !! Key !! Default !! Notes
|-
| [DatabaseService] || StorageProvider || (none) || DLL name -- fallback
|-
| [DatabaseService] || ConnectionString || (none) || DB connection string -- fallback
|-
| [AgentPreferencesService] || StorageProvider || (inherited) || Required section; overrides [DatabaseService]
|-
| [AgentPreferencesService] || ConnectionString || (inherited) || Overrides [DatabaseService]
|-
| [AgentPreferencesService] || Realm || AgentPrefs || Table name
|}

Throws if:
* [AgentPreferencesService] section is missing
* StorageProvider is empty after both layers
* Plugin cannot be loaded

The loaded plugin is stored as m_Database (IAgentPreferencesData).

No console commands are registered.

----

=== Data Model ===

One row per user. Fields stored:

{| class="wikitable"
! Field !! Type !! Notes
|-
| PrincipalID || UUID string || Stored in Data dictionary, not as a separate column in AgentPreferencesData
|-
| AccessPrefs || string || Access tier preference (e.g. "M" for Mature)
|-
| HoverHeight || float string || Avatar hover height
|-
| Language || string || BCP 47 language tag (e.g. "en-us")
|-
| LanguageIsPublic || "1" / "0" || Whether language preference is visible to others
|-
| PermEveryone || int string || Default everyone permissions on created objects
|-
| PermGroup || int string || Default group permissions on created objects
|-
| PermNextOwner || int string || Default next-owner permissions on created objects
|}

Conversion between AgentPreferencesData (dictionary) and AgentPrefs (typed object) is handled by the AgentPrefs constructor and StoreAgentPreferences().

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=== GetAgentPreferences ===

public AgentPrefs GetAgentPreferences(UUID principalID)

Calls m_Database.GetPrefs(principalID). Returns null if no record exists, otherwise constructs AgentPrefs from the returned data dictionary.

----

=== StoreAgentPreferences ===

public bool StoreAgentPreferences(AgentPrefs data)

Converts AgentPrefs to AgentPreferencesData dictionary and calls m_Database.Store(). All fields are written on every call -- no partial update. LanguageIsPublic is stored as "1" or "0", not "True"/"False".

Returns the result of m_Database.Store().

----

=== GetLang ===

public string GetLang(UUID principalID)

Convenience method. Calls GetAgentPreferences(), returns Language if the record exists and LanguageIsPublic is true. Returns "en-us" in all other cases (no record, or language is not public).

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=== Notes ===

* [AgentPreferencesService] section is mandatory -- missing it throws at startup, unlike most other services where the section is optional.
* There is no cache in this service.
* No console commands are registered.

----

== See Also ==

* [[OpenSimulator Internals/Code Map/ROBUST]]
* [[OpenSimulator Internals/Code Map/Shared]]
* [[OpenSimulator Internals/Databases]]

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