mirror of
https://github.com/Sea-Haven-Industries/procurement-ingest.git
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56 lines
2.4 KiB
Markdown
56 lines
2.4 KiB
Markdown
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# PO Ingest
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Coupa purchase-order email ingestion pipeline. SES receives Amazon PO emails, Claude extracts structured data, and the result lands in the shared `purchase-orders` DynamoDB table.
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## Flow
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1. Coupa sends a PO email to `amazon_po@int.seahaven.com`.
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2. SES (using the shared `INBOUND_MAIL` rule set) drops the raw MIME into `s3://po-ingest-emails-{AccountId}/inbound/`.
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3. S3 `ObjectCreated` fires the `po-email-processor` Lambda.
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4. The Lambda parses the email, sends it to Claude Haiku 4.5 for structured JSON extraction, and writes to DynamoDB.
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- `email_type: new_po` — conditional `PutItem` on `purchase-orders` (idempotent on `po_number`).
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- `email_type: cancellation` — `UpdateItem` marking the existing row `Cancelled`.
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5. LedgerFlow consumes the table via DynamoDB Streams → `po-sync`. This repo only writes.
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A separate `po-web-ui` Lambda (Function URL, unauthenticated) renders a simple HTML dashboard scanning the table.
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## Architecture
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- **IaC:** AWS CDK (Python), stack name `PoIngestStack`, region `us-east-1`.
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- **Lambdas:** `po-email-processor` (S3-triggered) and `po-web-ui` (Function URL). Python 3.12, 256 MB, 60s timeout.
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- **Storage:** S3 `po-ingest-emails-{AccountId}` with 90-day lifecycle expiry; DynamoDB `purchase-orders` (shared, not owned by this stack).
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- **Secrets:** Anthropic API key in Secrets Manager at `po-ingest/anthropic-api-key`.
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- **SES:** adds the `PoEmailRule` to the existing `INBOUND_MAIL` receipt rule set (shared with `workorder-ingest`).
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## Setup
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1. Bootstrap CDK in the account if you haven't already: `cdk bootstrap aws://{AccountId}/us-east-1`.
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2. Store the Anthropic API key:
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```bash
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aws secretsmanager create-secret \
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--name po-ingest/anthropic-api-key \
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--secret-string "sk-ant-..."
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```
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3. Install Lambda dependencies into the deployable package directory (gitignored):
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```bash
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pip install -r lambdas/email_processor/requirements.txt -t lambdas/email_processor/package/
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```
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4. Deploy:
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```bash
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cd cdk
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pip install -r requirements.txt
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cdk deploy
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```
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5. The `WebUIUrl` CloudFormation output is the dashboard URL.
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## Reprocessing
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To re-run the processor against every email still sitting in `inbound/` (useful after a parser change):
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```bash
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python scripts/reprocess.py # dry-run — lists keys
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python scripts/reprocess.py --execute # invokes po-email-processor for each
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```
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Inserts are conditional on `po_number`, so re-processing existing POs is a no-op.
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