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@@ -1,9 +1,101 @@
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-import { Hono } from 'hono'
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+import { Hono } from "hono"
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+import { Client, isFullPage } from "@notionhq/client"
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+import { z } from "zod"
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+import { zValidator } from "@hono/zod-validator"
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-const app = new Hono()
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+type Bindings = {
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+ NOTION_KEY: string
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+ NOTION_DB_ID: string
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+}
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-app.get('/', (c) => {
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- return c.text('Hello Hono!')
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+const xRateQuerySchema = z.object({
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+ from: z
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+ .string()
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+ .min(3, "Currency code must at length 3.")
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+ .max(3, "Currency code must at length 3."),
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+ to: z
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+ .string()
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+ .min(3, "Currency code must at length 3.")
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+ .max(3, "Currency code must at length 3."),
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+ amount: z.string(),
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})
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+const app = new Hono<{ Bindings: Bindings }>()
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+
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+app.get(
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+ "/convert/:from/:to/:amount",
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+ zValidator("param", xRateQuerySchema, (result, c) => {
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+ if (!result.success) {
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+ return c.json({ error: result.error.errors }, 400)
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+ }
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+ }),
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+ async c => {
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+ const notionKey = c.env.NOTION_KEY
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+ const notionDatabaseId = c.env.NOTION_DB_ID
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+
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+ if (!notionDatabaseId || !notionKey) {
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+ return c.json({ error: "Missing environment variables." }, 500)
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+ }
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+
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+ const from = c.req.param("from")
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+ const to = c.req.param("to")
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+ const amount = parseFloat(c.req.param("amount"))
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+
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+ try {
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+ const client = new Client({ auth: notionKey, fetch: fetch.bind(globalThis) })
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+ const query = await client.databases.query({
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+ database_id: notionDatabaseId,
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+ page_size: 2,
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+ filter: {
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+ or: [
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+ {
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+ type: "title",
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+ property: "Code",
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+ title: {
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+ equals: from,
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+ },
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+ },
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+ {
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+ type: "title",
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+ property: "Code",
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+ title: {
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+ equals: to,
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+ },
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+ },
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+ ],
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+ },
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+ })
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+ const pages = query.results.filter(page => isFullPage(page))
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+
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+ let ratesMap: {
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+ [key: string]: number
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+ } = {}
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+ for (const page of pages) {
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+ let currencyCodeProp = page.properties["Code"]
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+ let rateProp = page.properties["Rate"]
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+ if (currencyCodeProp!.type !== "title") {
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+ continue
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+ }
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+ if (rateProp!.type !== "number") {
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+ continue
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+ }
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+ ratesMap[currencyCodeProp.title[0]!.plain_text] = rateProp.number!
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+ }
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+
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+ return c.json({
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+ rates: ratesMap,
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+ amount: amount,
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+ target: amount * ratesMap[to] / ratesMap[from]
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+ }, 200, {
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+ "Content-Type": "application/json; charset=utf-8",
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+ "Cache-Control": "s-maxage=300, stale-while-revalidate=60",
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+ "Access-Control-Allow-Origin": "*",
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+ })
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+ } catch (error: any) {
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+ console.log(error)
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+ return c.json({ error: error.message }, 500)
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+ }
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+ }
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+)
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+
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export default app
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