move authorization code into new file

liberals/authorization.js

@@ -0,0 +1,38 @@
+const { globalConfig } = require("../index.js")
+
+async function checkAuthorization(documentToUse,keyToCheck) {
+    return await fetch(`http://${globalConfig.couchdb.host}/apiauthkeys/${documentToUse}`, {
+        headers: {
+            "Authorization": `Basic ${btoa(globalConfig.couchdb.authorization)}`
+        }
+    }).then(fetchRes => {
+
+        if (fetchRes.status === 404) { // If document doesnt exist fail gracefully
+
+            console.log("ERROR: Failed to check authorization: Requested document returned 404")
+            return false
+
+        } else if (fetchRes.status === 401) { // If couchdb is reporting unauthorized fail gracefully
+
+            console.log("ERROR: Failed to check authorization: Database authorization is incorrect")
+            return false
+
+        } else {
+            return fetchRes.json().then(dbRes => { // Get response json and check it
+
+                if (dbRes["content"][keyToCheck.split("_")[0]] === keyToCheck.split("_")[1]) {
+                    return true
+                } else {
+                    return false
+                }
+
+            })
+        }
+
+    }).catch(error => {
+        console.log("ERROR: Failed to check authorization: " + error)
+        return false
+    })
+}
+
+module.exports = {checkAuthorization}