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50 lines
1.7 KiB
Erlang
50 lines
1.7 KiB
Erlang
-module(pipeline).
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-export([run_stages/2,
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validate_inbound/1, validate_outbound/1,
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inbound_stages/0, outbound_stages/0,
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stage_envelope/1]).
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%% Validation pipeline per design §14.
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%%
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%% A stage is a 1-arity fun `(Activity) -> ok | {error, Reason}`.
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%% The driver folds the activity through the stage list, halting
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%% on the first error. The pure-functional driver itself takes a
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%% stage list directly so tests can inject ad-hoc stage sequences
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%% without depending on the bundled inbound/outbound lists.
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%%
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%% Inbound pipeline (full set per design §14): envelope, signature,
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%% replay, audience, activity_schema, object_schema, content_validators,
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%% capabilities, trust. Outbound is a subset (no replay, no trust;
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%% auth handled at the HTTP layer).
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%%
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%% This sub-deliverable (6a) wires only the driver and the empty
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%% stage lists. Concrete stages land in 6b-6c.
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run_stages(_Activity, []) -> ok;
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run_stages(Activity, [Stage | Rest]) ->
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Result = Stage(Activity),
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case Result of
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ok -> run_stages(Activity, Rest);
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{error, _} -> Result
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end.
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validate_inbound(Activity) ->
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run_stages(Activity, inbound_stages()).
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validate_outbound(Activity) ->
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run_stages(Activity, outbound_stages()).
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inbound_stages() ->
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[fun (A) -> stage_envelope(A) end].
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outbound_stages() ->
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[fun (A) -> stage_envelope(A) end].
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%% ── Concrete stages ─────────────────────────────────────────────
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%% stage_envelope/1 — wrap envelope:validate_shape/1. The pipeline
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%% driver expects ok | {error, R}; validate_shape returns exactly
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%% that, so delegation is direct.
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stage_envelope(Activity) ->
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envelope:validate_shape(Activity).
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