feat : ajout de la clôture de contrat et de la création de contrat

frontend/utils/contract.ts

@@ -0,0 +1,17 @@
+export const CONTRACT_NATURES = ['CDI', 'CDD', 'INTERIM'] as const
+
+export type ContractNature = (typeof CONTRACT_NATURES)[number]
+
+export const contractNatureLabel = (value?: ContractNature) => {
+  if (value === 'CDD') return 'CDD'
+  if (value === 'INTERIM') return 'Intérim'
+  return 'CDI'
+}
+
+export const requiresContractEndDate = (nature: ContractNature) => {
+  return nature === 'CDD' || nature === 'INTERIM'
+}
+
+export const isContractNature = (value: string): value is ContractNature => {
+  return (CONTRACT_NATURES as readonly string[]).includes(value)
+}