Fiscal period and multi bank (#228)

* feat: add fiscal period backward chaining and entry date validation Support creating fiscal periods before the earliest existing period (backward chaining) for backfill scenarios, alongside the existing forward chaining. The engine now validates that entry dates fall within the selected fiscal period, with a Swedish error message. The journal entry form auto-selects the matching period and shows a warning with a CreatePeriodDialog when no period covers the entry date. * feat: support multi-bank-account for imports and reconciliation Plumb a configurable settlement account through the entire bank import pipeline — mapping engine, transaction entries, ingest, and reconciliation — so secondary bank accounts (e.g. 1931, 1932) work correctly instead of hardcoding 1930. Adds a get_unlinked_bank_lines RPC that generalizes the existing get_unlinked_1930_lines with a fallback for backwards compatibility. The bank file import UI now shows a bank account selector when multiple 19xx accounts exist. Also adds default_vat_code/sru_code to account creation and fixes uploadDocument argument order in enable-banking sync.
2026-04-13 11:13:02 +02:00
parent 258a64a849
commit ade4ad5971
21 changed files with 1025 additions and 73 deletions
@@ -206,6 +206,95 @@ export async function createNextPeriod(
  return newPeriod as FiscalPeriod
 }

+/**
+ * Create a previous fiscal period before the given one.
+ * Computes a 12-month period ending the day before the given period starts.
+ * Updates previous_period_id chain so the given period points to the new one.
+ */
+export async function createPreviousPeriod(
+  supabase: SupabaseClient,
+  companyId: string,
+  userId: string,
+  currentPeriodId: string
+): Promise<FiscalPeriod> {
+
+  const { data: current, error: fetchError } = await supabase
+    .from('fiscal_periods')
+    .select('*')
+    .eq('id', currentPeriodId)
+    .eq('company_id', companyId)
+    .single()
+
+  if (fetchError || !current) {
+    throw new Error('Current fiscal period not found')
+  }
+
+  // Compute previous period end (day before current start)
+  const prevEnd = new Date(current.period_start + 'T12:00:00Z')
+  prevEnd.setUTCDate(prevEnd.getUTCDate() - 1)
+
+  // Compute previous period start (1st of month, 12 months before prevEnd)
+  const prevStart = new Date(prevEnd)
+  prevStart.setUTCMonth(prevStart.getUTCMonth() - 11)
+  prevStart.setUTCDate(1)
+
+  const prevStartStr = prevStart.toISOString().split('T')[0]
+  const prevEndStr = prevEnd.toISOString().split('T')[0]
+
+  // Validate period duration
+  const durationError = validatePeriodDuration(prevStartStr, prevEndStr, { isFirstPeriod: false })
+  if (durationError) {
+    throw new Error(durationError)
+  }
+
+  // Check for overlapping periods
+  const { data: overlapping } = await supabase
+    .from('fiscal_periods')
+    .select('id')
+    .eq('company_id', companyId)
+    .lte('period_start', prevEndStr)
+    .gte('period_end', prevStartStr)
+    .limit(1)
+
+  if (overlapping && overlapping.length > 0) {
+    throw new Error('Previous fiscal period already exists or overlaps with an existing period')
+  }
+
+  // Generate name
+  const startYear = prevStart.getFullYear()
+  const endYear = prevEnd.getFullYear()
+  const name = startYear === endYear ? `FY ${startYear}` : `FY ${startYear}/${endYear}`
+
+  const { data: newPeriod, error: insertError } = await supabase
+    .from('fiscal_periods')
+    .insert({
+      company_id: companyId,
+      user_id: userId,
+      name,
+      period_start: prevStartStr,
+      period_end: prevEndStr,
+    })
+    .select()
+    .single()
+
+  if (insertError || !newPeriod) {
+    throw new Error(`Failed to create previous period: ${insertError?.message}`)
+  }
+
+  // Update the current period to point to the new one
+  const { error: updateError } = await supabase
+    .from('fiscal_periods')
+    .update({ previous_period_id: newPeriod.id })
+    .eq('id', currentPeriodId)
+    .eq('company_id', companyId)
+
+  if (updateError) {
+    throw new Error(`Failed to update period chain: ${updateError.message}`)
+  }
+
+  return newPeriod as FiscalPeriod
+}
+
 /**
 * Get status summary for a fiscal period.
 */