From 1921c06b02519e2df3483b9aa34e934dce7a101f Mon Sep 17 00:00:00 2001
From: Ian Norden <iannordenn@gmail.com>
Date: Mon, 15 Apr 2019 11:30:23 -0500
Subject: [PATCH] repository - repository for indexing CIDs

---
 pkg/ipfs/repository.go | 107 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 pkg/ipfs/repository.go

diff --git a/pkg/ipfs/repository.go b/pkg/ipfs/repository.go
new file mode 100644
index 00000000..42090894
--- /dev/null
+++ b/pkg/ipfs/repository.go
@@ -0,0 +1,107 @@
+// VulcanizeDB
+// Copyright © 2019 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package ipfs
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+)
+
+type Repository interface {
+	IndexCIDs(cidPayload *CIDPayload) error
+}
+
+type CIDRepository struct {
+	db *postgres.DB
+}
+
+func NewCIDRepository(db *postgres.DB) *CIDRepository {
+	return &CIDRepository{
+		db: db,
+	}
+}
+
+func (repo *CIDRepository) IndexCIDs(cidPayload *CIDPayload) error {
+	headerID, err := repo.indexHeaderCID(cidPayload.HeaderCID, cidPayload.BlockNumber, cidPayload.BlockHash)
+	if err != nil {
+		return err
+	}
+	err = repo.indexTransactionAndReceiptCIDs(cidPayload, headerID)
+	if err != nil {
+		return err
+	}
+
+}
+
+
+func (repo *CIDRepository) indexHeaderCID(cid, blockNumber, hash string) (int64, error) {
+	var headerID int64
+	err := repo.db.QueryRowx(`INSERT INTO public.header_cids (block_number, block_hash, cid) VALUES ($1, $2, $3) 
+									RETURNING id
+									ON CONFLICT DO UPDATE SET cid = $3`, blockNumber, hash, cid).Scan(&headerID)
+	return headerID, err
+}
+
+func (repo *CIDRepository) indexTransactionAndReceiptCIDs(payload *CIDPayload, headerID int64) error {
+	for hash, trxCid := range payload.TransactionCIDs {
+		var txID int64
+		err := repo.db.QueryRowx(`INSERT INTO public.transaction_cids (header_id, tx_hash, cid) VALUES ($1, $2, $3) 
+										RETURNING id
+										ON CONFLICT DO UPDATE SET cid = $3`, headerID, hash.Hex(), trxCid).Scan(&txID)
+		if err != nil {
+			return err
+		}
+		receiptCid, ok := payload.ReceiptCIDs[hash]
+		if ok {
+			err = repo.indexReceiptCID(receiptCid, txID)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (repo *CIDRepository) indexReceiptCID(cid string, txId int64) error {
+	_, err := repo.db.Exec(`INSERT INTO public.receipt_cids (tx_id, cid) VALUES ($1, $2) 
+										ON CONFLICT DO UPDATE SET cid = $2`, txId, cid)
+	return err
+}
+
+func (repo *CIDRepository) indexStateAndStorageCIDs(payload *CIDPayload, headerID int64) error {
+	for accountKey, stateCID := range payload.StateLeafCIDs {
+		var stateID int64
+		err := repo.db.QueryRowx(`INSERT INTO public.state_cids (header_id, account_key, cid) VALUES ($1, $2, $3) 
+										RETURNING id
+										ON CONFLICT DO UPDATE SET cid = $3`, headerID, accountKey.Hex(), stateCID).Scan(&stateID)
+		if err != nil {
+			return err
+		}
+		for storageKey, storageCID := range payload.StorageLeafCIDs[accountKey] {
+			err = repo.indexStorageCID(storageKey.Hex(), storageCID, stateID)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (repo *CIDRepository) indexStorageCID(key, cid string, stateId int64) error {
+	_, err := repo.db.Exec(`INSERT INTO public.storage_cids (state_id, storage_key, cid) VALUES ($1, $2, $3) 
+										ON CONFLICT DO UPDATE SET cid = $3`, stateId, key, cid)
+	return err
+}
\ No newline at end of file