feat: add statistics

Author: gengjiawen

.husky/pre-commit

@@ -1,4 +1,5 @@
 #!/bin/sh
 . "$(dirname "$0")/_/husky.sh"
 
-npm run format
+npx --no-install lint-staged
+

util/crawl_leetcode.ts

@@ -3,7 +3,7 @@ import Sequelize from 'sequelize'
 import * as path from 'path'
 import async from 'async'
 
-const sequelize = new Sequelize.Sequelize('leetcode', 'null', 'null', {
+export const sequelize = new Sequelize.Sequelize('leetcode', 'null', 'null', {
   dialect: 'sqlite',
   define: {
     timestamps: true,

util/leetcode.test.ts

@@ -1,4 +1,5 @@
 import { extract_rust_solution, underline } from './utils'
+import { sequelize } from './crawl_leetcode'
 
 test('test underline filename', () => {
   const a = underline('minimum-swaps-to-group-all-1s-together')
@@ -24,3 +25,14 @@ test('reference test', () => {
   append_str(o)
   console.log(o)
 })
+
+test('leetcode statistics', async () => {
+  const r = await sequelize.query(
+    `select difficulty, count(*) from leetcode group by difficulty;`,
+  )
+  console.log(`easy medium hard`, r[0])
+  const paidCount = await sequelize.query(
+    `select count(*) from leetcode where paidOnly == 1;`,
+  )
+  console.log(`paid count`, paidCount[0])
+})