Switch to better FIT parser (#884)

* initial commit

* Fix undefined Buffer for clientside upload

---------

Co-authored-by: Christian Beutel <>

web/src/lib/vendor/fit-parser/helper.ts

@@ -0,0 +1,75 @@
+import type { ParsedLap, ParsedSession } from './fit_types'
+
+export function mapDataIntoLap(
+  inputLaps: ParsedLap[],
+  lapKey: 'records' | 'lengths',
+  data: any[],
+): ParsedLap[] {
+  const laps = [...inputLaps]
+  let index = 0
+  for (let i = 0; i < laps.length; i++) {
+    const nextLap = laps[i + 1]
+    const tempData = []
+    const nextLapStartTime = nextLap
+      ? new Date(nextLap.start_time).getTime()
+      : null
+    for (let j = index; j < data.length; j++) {
+      const row = data[j]
+      if (nextLap && nextLapStartTime) {
+        const timestamp = new Date(row.timestamp || row.start_time).getTime()
+        if (nextLapStartTime > timestamp) {
+          tempData.push(row)
+        }
+        else if (nextLapStartTime <= timestamp) {
+          index = j
+          break
+        }
+      }
+      else {
+        tempData.push(row)
+      }
+    }
+
+    if (!laps[i][lapKey]) {
+      laps[i][lapKey] = tempData
+    }
+  }
+
+  return laps
+}
+
+export function mapDataIntoSession(
+  inputSessions: ParsedSession[],
+  laps: ParsedLap[],
+): ParsedSession[] {
+  const sessions = [...inputSessions]
+  let lapIndex = 0
+  for (let i = 0; i < sessions.length; i++) {
+    const nextSession = sessions[i + 1]
+    const tempLaps = []
+    const nextSessionStartTime = nextSession
+      ? new Date(nextSession.start_time).getTime()
+      : null
+    for (let j = lapIndex; j < laps.length; j++) {
+      const lap = laps[j]
+      if (nextSession && nextSessionStartTime) {
+        const lapStartTime = new Date(lap.start_time).getTime()
+        if (nextSessionStartTime > lapStartTime) {
+          tempLaps.push(lap)
+        }
+        else if (nextSessionStartTime <= lapStartTime) {
+          lapIndex = j
+          break
+        }
+      }
+      else {
+        tempLaps.push(lap)
+      }
+    }
+
+    if (!sessions[i].laps) {
+      sessions[i].laps = tempLaps
+    }
+  }
+  return sessions
+}