1 files changed, 130 insertions, 0 deletions
diff --git a/src/scripts/migrate.ts b/src/scripts/migrate.ts
new file mode 100644
index 0000000..bf7d93c
--- /dev/null
+++ b/src/scripts/migrate.ts
@@ -0,0 +1,130 @@
+// @ts-nocheck
+import { randomId } from '@/lib/api'
+import { getPrisma } from '@/lib/prisma'
+import { Prisma } from '@prisma/client'
+import { Client } from 'pg'
+
+process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0'
+
+async function main() {
+  withClient(async (client) => {
+    const prisma = await getPrisma()
+
+    const { rows: groupRows } = await client.query<{
+      id: string
+      name: string
+      currency: string
+      created_at: Date
+    }>('select id, name, currency, created_at from groups')
+
+    for (const groupRow of groupRows) {
+      const participants: Prisma.ParticipantCreateManyInput[] = []
+      const expenses: Prisma.ExpenseCreateManyInput[] = []
+      const expenseParticipants: Prisma.ExpensePaidForCreateManyInput[] = []
+      const participantIdsMapping: Record<number, string> = {}
+      const expenseIdsMapping: Record<number, string> = {}
+
+      const existingGroup = await prisma.group.findUnique({
+        where: { id: groupRow.id },
+      })
+      if (existingGroup) {
+        console.log(`Group ${groupRow.id} already exists, skipping.`)
+        continue
+      }
+
+      const group: Prisma.GroupCreateInput = {
+        id: groupRow.id,
+        name: groupRow.name,
+        currency: groupRow.currency,
+        createdAt: groupRow.created_at,
+      }
+
+      const { rows: participantRows } = await client.query<{
+        id: number
+        created_at: Date
+        name: string
+      }>(
+        'select id, created_at, name from participants where group_id = $1::text',
+        [groupRow.id],
+      )
+      for (const participantRow of participantRows) {
+        const id = randomId()
+        participantIdsMapping[participantRow.id] = id
+        participants.push({
+          id,
+          groupId: groupRow.id,
+          name: participantRow.name,
+        })
+      }
+
+      const { rows: expenseRows } = await client.query<{
+        id: number
+        created_at: Date
+        description: string
+        amount: number
+        paid_by_participant_id: number
+        is_reimbursement: boolean
+      }>(
+        'select id, created_at, description, amount, paid_by_participant_id, is_reimbursement from expenses where group_id = $1::text',
+        [groupRow.id],
+      )
+      for (const expenseRow of expenseRows) {
+        const id = randomId()
+        expenseIdsMapping[expenseRow.id] = id
+        expenses.push({
+          id,
+          amount: Math.round(expenseRow.amount * 100),
+          groupId: groupRow.id,
+          title: expenseRow.description,
+          createdAt: expenseRow.created_at,
+          isReimbursement: expenseRow.is_reimbursement === true,
+          paidById: participantIdsMapping[expenseRow.paid_by_participant_id],
+        })
+      }
+
+      if (expenseRows.length > 0) {
+        const { rows: expenseParticipantRows } = await client.query<{
+          expense_id: number
+          participant_id: number
+        }>(
+          'select expense_id, participant_id from expense_participants where expense_id = any($1::int[]);',
+          [expenseRows.map((row) => row.id)],
+        )
+        for (const expenseParticipantRow of expenseParticipantRows) {
+          expenseParticipants.push({
+            expenseId: expenseIdsMapping[expenseParticipantRow.expense_id],
+            participantId:
+              participantIdsMapping[expenseParticipantRow.participant_id],
+          })
+        }
+      }
+
+      console.log('Creating group:', group)
+      await prisma.group.create({ data: group })
+      console.log('Creating participants:', participants)
+      await prisma.participant.createMany({ data: participants })
+      console.log('Creating expenses:', expenses)
+      await prisma.expense.createMany({ data: expenses })
+      console.log('Creating expenseParticipants:', expenseParticipants)
+      await prisma.expensePaidFor.createMany({ data: expenseParticipants })
+    }
+  })
+}
+
+async function withClient(fn: (client: Client) => void | Promise<void>) {
+  const client = new Client({
+    connectionString: process.env.OLD_POSTGRES_URL,
+    ssl: true,
+  })
+  await client.connect()
+  console.log('Connected.')
+
+  try {
+    await fn(client)
+  } finally {
+    await client.end()
+    console.log('Disconnected.')
+  }
+}
+
+main().catch(console.error)