feat(history): record the first registered provider as the default - #2985
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feat(history): record the first registered provider as the default#2985mairas wants to merge 3 commits into
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Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe History API now records the first provider as the default when settings are safe to persist. Configuration loading marks overridden or unreadable settings as unsafe. Source-reference migration avoids persistence in those cases while retaining in-memory changes. ChangesHistory default persistence
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to This change persists the first registered history provider as the default, but the current head can still persist transient provider settings during startup, leave the selected default unpersisted after a failed write, and omit required handling for certain source-reference migrations. Merge should wait for these bounded persistence and migration issues to be fixed or explicitly accepted by the owners. Sequence Diagram(s)sequenceDiagram
participant HistoryProvider
participant HistoryApiHttpRegistry
participant SettingsFile
participant ServerEvents
HistoryProvider->>HistoryApiHttpRegistry: register provider
HistoryApiHttpRegistry->>SettingsFile: persist provider when safe
HistoryApiHttpRegistry->>ServerEvents: publish provider state
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Actionable comments posted: 4
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Inline comments:
In `@docs/develop/rest-api/history_api.md`:
- Line 113: Update the default-provider behavior documentation in
docs/develop/rest-api/history_api.md at lines 113-113 to state that first
registration becomes persistent only when no configured default exists and
settings persistence is safe; update src/config/config.ts at lines 192-194 and
src/api/history/openApi.ts at line 359 to state that assignment or recording
requires an absent configured key and permitted persistence, while unsafe
runtime settings keep the first provider active only for the current run.
In `@src/api/history/index.ts`:
- Around line 166-187: Guard both debug calls in the saveConfiguredProvider
error callback with debug.enabled && so their interpolated template literals are
only evaluated when debug logging is enabled, preserving the existing messages
and control flow.
In `@test/config-unsafe-settings.ts`:
- Around line 24-30: Replace the as unknown as ConfigApp assertion in loadInto
with a typed test double that explicitly defines the ConfigApp members consumed
by load() and the configuration modules, including the required ServerApp and
SignalKMessageHub contract or a factory satisfying it; preserve the existing
config, get, set, and use behavior.
In `@test/history-api.ts`:
- Around line 602-605: Update the test using makeApp('') so it explicitly
assigns app.config.settings.historyApi to an object with defaultProvider set to
an empty string before calling makeRegistry(app). Preserve the existing provider
registration and assertion flow so the test exercises an explicitly configured
empty provider ID.
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docs/develop/rest-api/history_api.mdsrc/api/history/index.tssrc/api/history/openApi.tssrc/config/config.tssrc/sourceref-migration.tstest/config-unsafe-settings.tstest/history-api.tstest/sourceref-migration.ts
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Inline comments:
In `@src/api/history/index.ts`:
- Around line 160-163: Update the provider registration and persistence flow
around configuredProviderId and saveConfiguredProvider to retain the first
provider ID when its initial write fails. Continue retrying that pending
candidate on subsequent registrations until persistence succeeds or an operator
explicitly configures a default, rather than abandoning it when historyProviders
reaches size two.
In `@src/config/config.ts`:
- Line 225: Move the safeToPersistSettings initialization earlier in the config
startup flow, before readSettingsFile() is invoked, while preserving the later
temporary-mode clearing behavior for --data and sample-data paths. Add a
regression test covering settings that require priority migration and verify
temporary-mode startup does not rewrite the user settings file.
In `@src/sourceref-migration.ts`:
- Around line 270-282: Track channel-label changes separately from
settingsChanged in the source-reference migration flow, and update the
skipped-persistence branch around finalize() to log when either settings or
channel labels changed while mayPersist is false. Ensure channel-label-only
migrations are not silently skipped, and add an unsafe-persistence test using
only a channel-label fixture.
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docs/develop/rest-api/history_api.mdsrc/api/history/index.tssrc/api/history/openApi.tssrc/config/config.tssrc/sourceref-migration.tstest/config-safe-to-persist.tstest/history-api.tstest/sourceref-migration.ts
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app.config.settings does not always hold what the user configured. --data disables every configured pipedProvider and adds a FileStream for the log, the sample data flags add providers, and a settings file that exists but cannot be parsed falls back to empty settings. Writers that serialise that object save the stand-in over the real file, and the next ordinary start reads it back as the user's own configuration. The sourceRef migration is such a writer and needs no user action: it runs ten seconds after a device changes bus address. Replaying an N2K log with --data is enough to save a settings.json with every real connection disabled. Record the state in config.safeToPersistSettings and skip both of the migration's writes while it is cleared, settings.json and the channel labels file, so a run either persists the whole rename or none of it. The rewrites still apply in memory, so the running server is consistent with itself. The skip is permanent rather than deferred: migration runs from the sourceRefChanged event, and a later start of a device already at its new address raises no such event, so the log line names both refs for a manual rename. A missing settings file does not clear the flag; there is nothing to overwrite and a fresh install must still be able to save. This does not make settings safe in general. Every writer serialises the whole object, so the admin UI and ResourcesApi.saveSettings can still persist a replaced connection list. Those paths need their own fix.
The class disagreed with itself about an empty historyApi.defaultProvider. defaultProviderId and warnIfConfiguredUnavailable test truthiness and treat it as no choice, while configuredProviderAbsent and the HISTORYPROVIDERS event test for undefined and treat it as a configured provider that has gone missing. The grace window therefore armed on startup and the Admin UI reported `The configured default provider "" is not currently available` on a server that was working normally. Read an empty value as absent where settings are loaded, so all four agree. No supported path can write one — the POST route rejects a falsy id — so this only affects a hand-edited settings.json.
With no default in settings, the registry resolves one from registration order and never records it, so the choice is remade on every start. startPlugins does not await plugin.start(), so a provider that registers once its database answers loses the slot to one that registers straight from start(), and the switch is silent because the unavailable warning covers configured providers only. Record the first provider to register, through the same settings write the POST route uses, so a provider installed later cannot take the default from the one already serving. The resources API does this for resource providers. Nothing is recorded while settings do not represent the configured state. A failed write is reported once per run rather than per attempt: the retry stays, but console.error reaches the log ring the Admin UI subscribes to, and a plugin reconnecting in a loop would push the errors explaining the loop out of it.
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With no default in settings, the History API resolves one from registration order and never
records it, so the choice is remade on every start.
startPluginsdoes not awaitplugin.start(), so a provider that registers once its database answers loses the slot toone that registers straight from
start(). The switch is silent, because the unavailablewarning only covers a provider that is configured.
This records the first provider to register, through the same
saveConfiguredProviderthePOST route uses, so a provider installed later cannot take the default from the one already
serving. The resources API already does this for resource providers. Nothing is recorded
while
config.safeToPersistSettingsis cleared. A failed write is reported once per runrather than per attempt: the retry stays, but
console.errorreaches the log ring the AdminUI subscribes to, and a plugin reconnecting in a loop would otherwise push the errors that
explain the loop out of it.
A key an operator set still wins, a configured provider that is not registered still falls
back and still raises the unavailable warning, and the grace window on unregister is
unchanged.
Two things worth knowing before review:
safeToPersistSettingsis introduced there, so this branch doesnot build against master on its own. fix(config): do not persist settings that hold run-only state #2984 should land first; I will rebase this one
afterwards.
than part of the feature. The class disagreed with itself about an empty
historyApi.defaultProvider:defaultProviderIdand the notification treated it as nochoice, while the grace window and the
HISTORYPROVIDERSevent treated it as aconfigured provider gone missing, so the Admin UI reported a default named
""asunavailable on a healthy server. Happy to split it into its own PR if you would rather
review it separately.
closes #2981
Summary
historyApi.defaultProvidervalues as unset.safeToPersistSettingsis false.