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| 1 | +import { sql } from '@vercel/postgres'; |
| 2 | +import { |
| 3 | + CustomerField, |
| 4 | + CustomersTableType, |
| 5 | + InvoiceForm, |
| 6 | + InvoicesTable, |
| 7 | + LatestInvoiceRaw, |
| 8 | + User, |
| 9 | + Revenue, |
| 10 | +} from './definitions'; |
| 11 | +import { formatCurrency } from './utils'; |
| 12 | + |
| 13 | +export async function fetchRevenue() { |
| 14 | + // Add noStore() here to prevent the response from being cached. |
| 15 | + // This is equivalent to in fetch(..., {cache: 'no-store'}). |
| 16 | + |
| 17 | + try { |
| 18 | + // Artificially delay a response for demo purposes. |
| 19 | + // Don't do this in production :) |
| 20 | + |
| 21 | + // console.log('Fetching revenue data...'); |
| 22 | + // await new Promise((resolve) => setTimeout(resolve, 3000)); |
| 23 | + |
| 24 | + const data = await sql<Revenue>`SELECT * FROM revenue`; |
| 25 | + |
| 26 | + // console.log('Data fetch completed after 3 seconds.'); |
| 27 | + |
| 28 | + return data.rows; |
| 29 | + } catch (error) { |
| 30 | + console.error('Database Error:', error); |
| 31 | + throw new Error('Failed to fetch revenue data.'); |
| 32 | + } |
| 33 | +} |
| 34 | + |
| 35 | +export async function fetchLatestInvoices() { |
| 36 | + try { |
| 37 | + const data = await sql<LatestInvoiceRaw>` |
| 38 | + SELECT invoices.amount, customers.name, customers.image_url, customers.email, invoices.id |
| 39 | + FROM invoices |
| 40 | + JOIN customers ON invoices.customer_id = customers.id |
| 41 | + ORDER BY invoices.date DESC |
| 42 | + LIMIT 5`; |
| 43 | + |
| 44 | + const latestInvoices = data.rows.map((invoice) => ({ |
| 45 | + ...invoice, |
| 46 | + amount: formatCurrency(invoice.amount), |
| 47 | + })); |
| 48 | + return latestInvoices; |
| 49 | + } catch (error) { |
| 50 | + console.error('Database Error:', error); |
| 51 | + throw new Error('Failed to fetch the latest invoices.'); |
| 52 | + } |
| 53 | +} |
| 54 | + |
| 55 | +export async function fetchCardData() { |
| 56 | + try { |
| 57 | + // You can probably combine these into a single SQL query |
| 58 | + // However, we are intentionally splitting them to demonstrate |
| 59 | + // how to initialize multiple queries in parallel with JS. |
| 60 | + const invoiceCountPromise = sql`SELECT COUNT(*) FROM invoices`; |
| 61 | + const customerCountPromise = sql`SELECT COUNT(*) FROM customers`; |
| 62 | + const invoiceStatusPromise = sql`SELECT |
| 63 | + SUM(CASE WHEN status = 'paid' THEN amount ELSE 0 END) AS "paid", |
| 64 | + SUM(CASE WHEN status = 'pending' THEN amount ELSE 0 END) AS "pending" |
| 65 | + FROM invoices`; |
| 66 | + |
| 67 | + const data = await Promise.all([ |
| 68 | + invoiceCountPromise, |
| 69 | + customerCountPromise, |
| 70 | + invoiceStatusPromise, |
| 71 | + ]); |
| 72 | + |
| 73 | + const numberOfInvoices = Number(data[0].rows[0].count ?? '0'); |
| 74 | + const numberOfCustomers = Number(data[1].rows[0].count ?? '0'); |
| 75 | + const totalPaidInvoices = formatCurrency(data[2].rows[0].paid ?? '0'); |
| 76 | + const totalPendingInvoices = formatCurrency(data[2].rows[0].pending ?? '0'); |
| 77 | + |
| 78 | + return { |
| 79 | + numberOfCustomers, |
| 80 | + numberOfInvoices, |
| 81 | + totalPaidInvoices, |
| 82 | + totalPendingInvoices, |
| 83 | + }; |
| 84 | + } catch (error) { |
| 85 | + console.error('Database Error:', error); |
| 86 | + throw new Error('Failed to fetch card data.'); |
| 87 | + } |
| 88 | +} |
| 89 | + |
| 90 | +const ITEMS_PER_PAGE = 6; |
| 91 | +export async function fetchFilteredInvoices( |
| 92 | + query: string, |
| 93 | + currentPage: number, |
| 94 | +) { |
| 95 | + const offset = (currentPage - 1) * ITEMS_PER_PAGE; |
| 96 | + |
| 97 | + try { |
| 98 | + const invoices = await sql<InvoicesTable>` |
| 99 | + SELECT |
| 100 | + invoices.id, |
| 101 | + invoices.amount, |
| 102 | + invoices.date, |
| 103 | + invoices.status, |
| 104 | + customers.name, |
| 105 | + customers.email, |
| 106 | + customers.image_url |
| 107 | + FROM invoices |
| 108 | + JOIN customers ON invoices.customer_id = customers.id |
| 109 | + WHERE |
| 110 | + customers.name ILIKE ${`%${query}%`} OR |
| 111 | + customers.email ILIKE ${`%${query}%`} OR |
| 112 | + invoices.amount::text ILIKE ${`%${query}%`} OR |
| 113 | + invoices.date::text ILIKE ${`%${query}%`} OR |
| 114 | + invoices.status ILIKE ${`%${query}%`} |
| 115 | + ORDER BY invoices.date DESC |
| 116 | + LIMIT ${ITEMS_PER_PAGE} OFFSET ${offset} |
| 117 | + `; |
| 118 | + |
| 119 | + return invoices.rows; |
| 120 | + } catch (error) { |
| 121 | + console.error('Database Error:', error); |
| 122 | + throw new Error('Failed to fetch invoices.'); |
| 123 | + } |
| 124 | +} |
| 125 | + |
| 126 | +export async function fetchInvoicesPages(query: string) { |
| 127 | + try { |
| 128 | + const count = await sql`SELECT COUNT(*) |
| 129 | + FROM invoices |
| 130 | + JOIN customers ON invoices.customer_id = customers.id |
| 131 | + WHERE |
| 132 | + customers.name ILIKE ${`%${query}%`} OR |
| 133 | + customers.email ILIKE ${`%${query}%`} OR |
| 134 | + invoices.amount::text ILIKE ${`%${query}%`} OR |
| 135 | + invoices.date::text ILIKE ${`%${query}%`} OR |
| 136 | + invoices.status ILIKE ${`%${query}%`} |
| 137 | + `; |
| 138 | + |
| 139 | + const totalPages = Math.ceil(Number(count.rows[0].count) / ITEMS_PER_PAGE); |
| 140 | + return totalPages; |
| 141 | + } catch (error) { |
| 142 | + console.error('Database Error:', error); |
| 143 | + throw new Error('Failed to fetch total number of invoices.'); |
| 144 | + } |
| 145 | +} |
| 146 | + |
| 147 | +export async function fetchInvoiceById(id: string) { |
| 148 | + try { |
| 149 | + const data = await sql<InvoiceForm>` |
| 150 | + SELECT |
| 151 | + invoices.id, |
| 152 | + invoices.customer_id, |
| 153 | + invoices.amount, |
| 154 | + invoices.status |
| 155 | + FROM invoices |
| 156 | + WHERE invoices.id = ${id}; |
| 157 | + `; |
| 158 | + |
| 159 | + const invoice = data.rows.map((invoice) => ({ |
| 160 | + ...invoice, |
| 161 | + // Convert amount from cents to dollars |
| 162 | + amount: invoice.amount / 100, |
| 163 | + })); |
| 164 | + |
| 165 | + return invoice[0]; |
| 166 | + } catch (error) { |
| 167 | + console.error('Database Error:', error); |
| 168 | + throw new Error('Failed to fetch invoice.'); |
| 169 | + } |
| 170 | +} |
| 171 | + |
| 172 | +export async function fetchCustomers() { |
| 173 | + try { |
| 174 | + const data = await sql<CustomerField>` |
| 175 | + SELECT |
| 176 | + id, |
| 177 | + name |
| 178 | + FROM customers |
| 179 | + ORDER BY name ASC |
| 180 | + `; |
| 181 | + |
| 182 | + const customers = data.rows; |
| 183 | + return customers; |
| 184 | + } catch (err) { |
| 185 | + console.error('Database Error:', err); |
| 186 | + throw new Error('Failed to fetch all customers.'); |
| 187 | + } |
| 188 | +} |
| 189 | + |
| 190 | +export async function fetchFilteredCustomers(query: string) { |
| 191 | + try { |
| 192 | + const data = await sql<CustomersTableType>` |
| 193 | + SELECT |
| 194 | + customers.id, |
| 195 | + customers.name, |
| 196 | + customers.email, |
| 197 | + customers.image_url, |
| 198 | + COUNT(invoices.id) AS total_invoices, |
| 199 | + SUM(CASE WHEN invoices.status = 'pending' THEN invoices.amount ELSE 0 END) AS total_pending, |
| 200 | + SUM(CASE WHEN invoices.status = 'paid' THEN invoices.amount ELSE 0 END) AS total_paid |
| 201 | + FROM customers |
| 202 | + LEFT JOIN invoices ON customers.id = invoices.customer_id |
| 203 | + WHERE |
| 204 | + customers.name ILIKE ${`%${query}%`} OR |
| 205 | + customers.email ILIKE ${`%${query}%`} |
| 206 | + GROUP BY customers.id, customers.name, customers.email, customers.image_url |
| 207 | + ORDER BY customers.name ASC |
| 208 | + `; |
| 209 | + |
| 210 | + const customers = data.rows.map((customer) => ({ |
| 211 | + ...customer, |
| 212 | + total_pending: formatCurrency(customer.total_pending), |
| 213 | + total_paid: formatCurrency(customer.total_paid), |
| 214 | + })); |
| 215 | + |
| 216 | + return customers; |
| 217 | + } catch (err) { |
| 218 | + console.error('Database Error:', err); |
| 219 | + throw new Error('Failed to fetch customer table.'); |
| 220 | + } |
| 221 | +} |
| 222 | + |
| 223 | +export async function getUser(email: string) { |
| 224 | + try { |
| 225 | + const user = await sql`SELECT * FROM users WHERE email=${email}`; |
| 226 | + return user.rows[0] as User; |
| 227 | + } catch (error) { |
| 228 | + console.error('Failed to fetch user:', error); |
| 229 | + throw new Error('Failed to fetch user.'); |
| 230 | + } |
| 231 | +} |
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