Detect file format by reading header of arrayBuffer

standalone_app/src/components/StorageLoader.tsx

@@ -30,12 +30,13 @@ export const StorageLoader: FC = () => {
     const r = new FileReader()
     r.addEventListener("load", () => {
       const arrayBuffer = r.result as ArrayBuffer | null
-      const fileExtension = file.name.split(".").pop()
       if (arrayBuffer !== null) {
-        if (fileExtension === "log") {
-          loadJournalStorage(arrayBuffer, setStudies)
-        } else {
+        const header = new Uint8Array(arrayBuffer, 0, 16)
+        const headerString = new TextDecoder().decode(header)
+        if (headerString === "SQLite format 3\u0000") {
           loadSQLite3Storage(arrayBuffer, setStudies)
+        } else {
+          loadJournalStorage(arrayBuffer, setStudies)
         }
       }
     })

standalone_app/src/journalStorage.ts

@@ -376,5 +376,6 @@ export const loadJournalStorage = (
     }
   }
 
-  setter((prev) => [...prev, ...journalStorage.getStudies()])
+  const studies = journalStorage.getStudies()
+  setter((prev) => [...prev, ...studies])
 }

standalone_app/src/sqlite3.ts

@@ -174,12 +174,12 @@ const getTrials = (
         vals[2] === "COMPLETE"
           ? "Complete"
           : vals[2] === "PRUNED"
-          ? "Pruned"
-          : vals[2] === "RUNNING"
-          ? "Running"
-          : vals[2] === "WAITING"
-          ? "Waiting"
-          : "Fail"
+            ? "Pruned"
+            : vals[2] === "RUNNING"
+              ? "Running"
+              : vals[2] === "WAITING"
+                ? "Waiting"
+                : "Fail"
       const trial: Trial = {
         trial_id: trialId,
         number: vals[1],
@@ -220,8 +220,8 @@ const getTrialValues = (
           vals[1] === "INF_NEG"
             ? "-inf"
             : vals[1] === "INF_POS"
-            ? "+inf"
-            : vals[0]
+              ? "+inf"
+              : vals[0]
         )
       },
     })
@@ -391,10 +391,10 @@ const getTrialIntermediateValues = (
             vals[2] === "INF_NEG"
               ? "-inf"
               : vals[2] === "INF_POS"
-              ? "+inf"
-              : vals[2] === "NAN"
-              ? "nan"
-              : vals[1],
+                ? "+inf"
+                : vals[2] === "NAN"
+                  ? "nan"
+                  : vals[1],
         })
       },
     })