Adds a new JSON-bodied signature endpoint as a sibling of the
legacy PNG-based prosign/clisign routes. The legacy flow stays
intact: the TeX invoice templates (Bill_tex.cshtml,
Estimate_tex.cshtml) still consume the sign-{billingCode}-{id}.png
files the old endpoints write, and the new endpoint writes to a
distinct /signatures/ tree under UserFilesDirName. A future
migration commit will regenerate PNGs from the JSON payload and
decommission the PNG flow.
Scope
- New Signature entity (Yavsc.Server/Models/Billing/Signature.cs)
with FK to Estimate, FK to ApplicationUser (Signer), Type
(Pro/Client) enum, CoordinateMax (default 10_000), int[] Strokes
(native Npgsql mapping), CapturedAtUtc, FilePath. Multiple
versions per (EstimateId, Type) are allowed; the controller
reads the most recent.
- New Estimate.Signatures nav collection (InverseProperty) so the
composite index covers both sides of the relation.
- New DbSet<Signature> Signatures + composite index
(EstimateId, Type, CapturedAtUtc DESC) in ApplicationDbContext
OnModelCreating. DeleteBehavior.Cascade on Estimate deletion
cleans up signatures automatically.
- New EstimateSignatureFileHelper (Server/Helpers) with
ReceiveEstimateSignatureAsync(user, estimateId, type, payload).
Writes a yavsc.signature/v1 JSON envelope to
UserFilesDirName/{user}/signatures/sign-{type}-{estimateId}-{ticks}.json.
Quota update lives in the controller, not the helper, because
the helper has no DbContext access.
- New endpoint POST /api/bill/estimate/{id:long}/sign on
BillingController. Authz is body-driven (the bearer token is the
PostIt OAuth client, not the end user, so signerUserId is in
the JSON body, validated against Estimate.OwnerId/ClientId).
Returns 201 Created with the new Signature's metadata.
Plumbing
- SignatureSubmission (body type) lives next to BillingController
in the same file — small enough to keep colocated.
- The legacy prosign/clisign routes are untouched. They keep
the IFormFile PNG contract; the new endpoint is the JSON
counterpart.
Tests
- New EstimateSignatureFileHelperTests in Yavsc.Org.Tests
(8 tests, all green): filename format incl. lowercase type and
ticks, envelope v1 round-trip (parsed via JsonDocument, not
text matching), null payload rejected, non-positive
estimateId rejected. Disk side effects are isolated to a
per-test temp root via AbstractFileSystemHelpers.UserFilesDirName.
- Yavsc.Org.Tests full suite: 29/29 green.
- PostIt.Tests: 57/57 green (untouched by this commit).
- Builds: Yavsc.Server, Yavsc.Api, Yavsc.Org, Yavsc.Org.Tests
all compile clean.
Out of scope
- EF migration: the Signatures table doesn't exist in the
database yet. The migration is intentionally a separate
commit so the generated SQL can be reviewed against the
composite index and the int[] column type before it touches
any prod database. Until the migration lands, the new
endpoint will 500 on SaveChanges; the [DEV] button in
PostIt is the only call site, so this is acceptable.
- SignalR handler that opens the signature page on a
'devis received' push — commit 4.
