Remove anytype cast from config loader

package-lock.json

@@ -12,7 +12,8 @@
         "@network-utils/tcp-ping": "^1.2.3",
         "discord-webhook-node": "^1.1.8",
         "dotenv": "^16.3.1",
-        "ping": "^0.4.4"
+        "ping": "^0.4.4",
+        "zod": "^3.22.4"
       },
       "devDependencies": {
         "@types/node": "^20.10.5",
@@ -183,6 +184,14 @@
         "tr46": "~0.0.3",
         "webidl-conversions": "^3.0.0"
       }
+    },
+    "node_modules/zod": {
+      "version": "3.22.4",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.22.4.tgz",
+      "integrity": "sha512-iC+8Io04lddc+mVqQ9AZ7OQ2MrUKGN+oIQyq1vemgt46jwCwLfhq7/pwnBnNXXXZb8VTVLKwp9EDkx+ryxIWmg==",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
     }
   }
 }

package.json

@@ -19,6 +19,7 @@
     "@network-utils/tcp-ping": "^1.2.3",
     "discord-webhook-node": "^1.1.8",
     "dotenv": "^16.3.1",
-    "ping": "^0.4.4"
+    "ping": "^0.4.4",
+    "zod": "^3.22.4"
   }
 }

src/config.ts

@@ -1,40 +1,50 @@
 import { readFileSync } from "fs"
-
+import { z } from "zod"
 export const defaultInterval = 60
 export const defaultNotifyInterval = 300
 
-export type Config = {
-    alertEndpoints: ({
-        enabled: boolean
-        name: string
-    } & ({
-        type: "discord-webhook"
-        webhookUrl: string
-    } | {
-        type: "telegram"
-        token: string
-        chatIds: string[]
-    } | {
-        type: "pushover"
-        token: string
-        destinationIds: string[]
-    }))[],
-    pollEndpoints: ({
-        name: string
-        interval?: number
-        notifyInterval?: number
-        alertEndpoints: string[]
-    } & ({
-        type: "fetch"
-        url: string
-    } | {
-        type: "ping"
-        address: string
-    } | {
-        type: "tcp-ping"
-        address: string
-        port?: number
-    }))[]
-}
+const configSchema = z.object({
+    alertEndpoints: z.array(z.object({
+        enabled: z.boolean(),
+        name: z.string()
+    }).and(z.union([
+        z.object({
+            type: z.literal("discord-webhook"),
+            webhookUrl: z.string()
+        }),
+        z.object({
+            type: z.literal("telegram"),
+            token: z.string(),
+            chatIds: z.array(z.string())
+        }),
+        z.object({
+            type: z.literal("pushover"),
+            token: z.string(),
+            destinationIds: z.array(z.string())
+        })
+    ]))),
+    pollEndpoints: z.array(z.object({
+        name: z.string(),
+        interval: z.number().default(60),
+        notifyInterval: z.number().default(300),
+        alertEndpoints: z.array(z.string())
+    }).and(z.union([
+        z.object({
+            type: z.literal("fetch"),
+            url: z.string()
+        }),
+        z.object({
+            type: z.literal("ping"),
+            address: z.string()
+        }),
+        z.object({
+            type: z.literal("tcp-ping"),
+            address: z.string(),
+            port: z.number().default(80)
+        })
+    ])))
+})
 
-export const config = JSON.parse(readFileSync("./config.json").toString()) as Config
+export type Config = z.infer<typeof configSchema>
+
+export const config = configSchema.parse(JSON.parse(readFileSync("./config.json").toString()))

src/handler.ts

@@ -10,7 +10,7 @@ export const handleDown = (endpointState: EndpointState, curTime: number, endpoi
     endpointState.isDown = true
     if (!prevDown) endpointState.downStart = curTime
 
-    if (curTime - endpointState.lastDownAlert < (endpoint.notifyInterval ?? defaultNotifyInterval) * 1000) return
+    if (curTime - endpointState.lastDownAlert < (endpoint.notifyInterval) * 1000) return
     const message = prevDown ? 
         `[${formatTS(curTime)}] ${endpoint.name} is still down and initially went down at ${formatTS(endpointState.downStart)}` :
         `[${formatTS(curTime)}] ${endpoint.name} went down`

src/index.ts

@@ -19,7 +19,7 @@ const isEndpointUp = async (endpoint: Config["pollEndpoints"][number]) => {
         return r.ok
     }
     else if (endpoint.type === "tcp-ping" ) {
-        const r = await ping({address: endpoint.address, port:endpoint.port ?? 80})
+        const r = await ping({address: endpoint.address, port:endpoint.port})
         return r.errors.length === 0
     }
     else if (endpoint.type === "ping") {
@@ -34,7 +34,7 @@ const executor = async () => {
         config.pollEndpoints.map(async endpoint => {
         const endpointState = state.get(endpoint.name)
         if (endpointState === undefined) console.log(`Could not find endpoint for ${endpoint.name}`)
-        else if (curTime - endpointState.lastExec > ((endpoint.interval ?? defaultInterval) * 1000)) {
+        else if (curTime - endpointState.lastExec > ((endpoint.interval) * 1000)) {
             console.log(`Time to poll ${endpoint.name}`)
             endpointState.lastExec = curTime
             if (await isEndpointUp(endpoint)) handleUp(endpointState, curTime, endpoint)