123 lines
4.0 KiB
Markdown
123 lines
4.0 KiB
Markdown
# State Internals
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This document describes filesystem state in `internal/state`.
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## Purpose
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`internal/state` owns managed workspace paths, atomic JSON writes, persisted
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metadata, prior snapshot lookup, and read-only artifact inspection helpers.
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## Inputs And Outputs
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Inputs:
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- workspace configuration
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- resolved report definition and valid period
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- briefing package
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- prompt input data package
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- preflight artifact
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- rendered report path preparation request
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- RunID for inspection lookups
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Outputs:
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- briefing snapshot JSON path
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- prompt input data package JSON path
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- render preflight JSON path
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- managed Markdown report path
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- metadata JSON path
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- prior comparable snapshot metadata
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- loaded briefing or data package
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- recent report records for inspection
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## Boundaries
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`internal/state` owns local filesystem layout, path validation, durable writes,
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metadata reads, prior lookup, and report listing. It does not fetch weather
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data, derive forecasts, build prompt input content, compare briefing contents,
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invoke Scriptorium, import adapter result types, or parse CLI flags.
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Preflight persistence uses the state-owned `PreflightArtifact` shape. The app
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converts adapter render results into that shape before saving.
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## Config Fields Used
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- `workspace.root`
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- `workspace.snapshots_dir`
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- `workspace.reports_dir`
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- `workspace.data_packages_dir`
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- `workspace.preflight_dir`
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- `workspace.notifications_dir`
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Workspace subdirectories must be relative paths that stay under
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`workspace.root`.
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## Managed Layout
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Paths are derived from the resolved report definition's artifact group, the
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valid-period start date for JSON artifacts, and the RunID.
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```text
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<workspace.root>/
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snapshots/<artifact_group>/<YYYY-MM-DD>/<run_id>.briefing.json
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snapshots/<artifact_group>/<YYYY-MM-DD>/<run_id>.metadata.json
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data-packages/<artifact_group>/<YYYY-MM-DD>/<run_id>.data_package.json
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preflight/<artifact_group>/<YYYY-MM-DD>/<run_id>.render.json
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notifications/<artifact_group>/<YYYY-MM-DD>/<run_id>.distributor.json
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reports/<artifact_group>/<run_id>.md
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```
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Metadata is stored beside briefing snapshots and links the briefing, data
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package, preflight, report paths, notification path when attempted, and
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configured prompt location. Report listing walks metadata files under the
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snapshots directory.
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## Prior Lookup
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Prior snapshot lookup reads stored metadata through the shared lookup path and
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selects the latest earlier snapshot whose report ID is compatible with the
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current report definition.
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- Daily Today and Daily Tomorrow are compatible with each other for the same
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valid local date.
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- 3-Day Outlook compares with prior 3-Day snapshots for the same valid local
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date.
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- Weekend Outlook compares with prior Weekend snapshots for the same weekend
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window.
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- Storm Report currently has no prior lookup because explicit event-window
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comparison is not searched by the filesystem store.
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## Writes And Inspection
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Durable JSON writes use shared atomic file helpers. Managed Markdown reports are
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prepared by creating their parent directory; Scriptorium writes the report body
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to the prepared path. Extra Markdown copies are handled by app orchestration.
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Distributor notification debug artifacts are written atomically when
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notification is attempted.
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Inspection helpers read existing metadata, briefing, and data package files.
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Missing metadata directories return no inspection records or no prior snapshot
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rather than creating state.
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## Failure Behavior
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- Invalid workspace paths return validation errors.
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- Missing required metadata fields prevent metadata writes.
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- JSON writes use a temporary file followed by rename where practical.
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- Read and decode failures include path context.
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- Unknown RunIDs produce an actionable lookup error.
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## Tests
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Inspect:
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- `internal/state/filesystem_test.go`
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- `internal/app/app_test.go`
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## Invariants
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- Managed paths stay under the configured workspace root.
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- Artifact grouping comes from report definitions.
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- Metadata links artifacts produced for a run.
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- Prior lookup is based on structured metadata, not rendered report text.
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