adds checks for column headers

packages/builder/src/components/backend/TableNavigator/utils.js

@@ -58,7 +58,7 @@ export const parseFile = e => {
             resolveRows(rows)
           })
           .catch(() => {
-            reject("cannot parse csv")
+            reject("cannot parse csv.")
           })
       }
     })

packages/server/src/utilities/csv.ts

@@ -1,9 +1,16 @@
 import csv from "csvtojson"
 
 export async function jsonFromCsvString(csvString: string) {
-  const castedWithEmptyValues = await csv({ ignoreEmpty: true }).fromString(
-    csvString
-  )
+  const possibleDelimeters = [",", ";", ":", "|", "~", "\t", " "]
+
+  for (let i = 0; i < possibleDelimeters.length; i++) {
+    let numOfHeaders: number | undefined = undefined
+    let headerMismatch = false
+
+    const castedWithEmptyValues = await csv({
+      ignoreEmpty: true,
+      delimiter: possibleDelimeters[i],
+    }).fromString(csvString)
 
     // By default the csvtojson library casts empty values as empty strings. This
     // is causing issues on conversion.  ignoreEmpty will remove the key completly
@@ -11,15 +18,30 @@ export async function jsonFromCsvString(csvString: string) {
     // with the keys but empty values
     const result = await csv({
       ignoreEmpty: false,
-    delimiter: [",", ";", ":", "|", "~", "\t", " "],
+      delimiter: possibleDelimeters[i],
     }).fromString(csvString)
-  result.forEach((r, i) => {
-    for (const [key] of Object.entries(r).filter(([, value]) => value === "")) {
-      if (castedWithEmptyValues[i][key] === undefined) {
-        r[key] = null
+    for (const [i, r] of result.entries()) {
+      const columns = Object.keys(r)
+      if (numOfHeaders == null) {
+        numOfHeaders = columns.length
+      }
+      if (numOfHeaders !== columns.length) {
+        headerMismatch = true
+        break
+      }
+      for (const [key] of Object.entries(r).filter(
+        ([, value]) => value === ""
+      )) {
+        // if (castedWithEmptyValues[i][key] === undefined) {
+        //   r[key] = null
+        // }
       }
     }
-  })
-
+    if (headerMismatch) {
+      continue
+    } else {
       return result
+    }
+  }
+  throw new Error("Unable to determine delimiter")
 }