✨ (setVariable) Add Transcription system var (#1507)

Closes #1484

packages/variables/updateVariablesInSession.ts

@@ -1,41 +1,102 @@
 import { safeStringify } from '@typebot.io/lib/safeStringify'
 import { Variable, VariableWithUnknowValue } from './types'
+import { SessionState, SetVariableHistoryItem } from '../schemas'
 
-export const updateVariablesInSession =
-  (state: any) => (newVariables: VariableWithUnknowValue[]) => ({
-    ...state,
-    typebotsQueue: state.typebotsQueue.map(
-      (typebotInQueue: { typebot: { variables: Variable[] } }, index: number) =>
+type Props = {
+  state: SessionState
+  newVariables: VariableWithUnknowValue[]
+  currentBlockId: string | undefined
+}
+export const updateVariablesInSession = ({
+  state,
+  newVariables,
+  currentBlockId,
+}: Props): {
+  updatedState: SessionState
+  newSetVariableHistory: SetVariableHistoryItem[]
+} => {
+  const { updatedVariables, newSetVariableHistory, setVariableHistoryIndex } =
+    updateTypebotVariables({
+      state,
+      newVariables,
+      currentBlockId,
+    })
+
+  return {
+    updatedState: {
+      ...state,
+      currentSetVariableHistoryIndex: setVariableHistoryIndex,
+      typebotsQueue: state.typebotsQueue.map((typebotInQueue, index: number) =>
         index === 0
           ? {
               ...typebotInQueue,
               typebot: {
                 ...typebotInQueue.typebot,
-                variables: updateTypebotVariables(typebotInQueue.typebot)(
-                  newVariables
-                ),
+                variables: updatedVariables,
               },
             }
           : typebotInQueue
-    ),
-  })
+      ),
+      previewMetadata: state.typebotsQueue[0].resultId
+        ? state.previewMetadata
+        : {
+            ...state.previewMetadata,
+            setVariableHistory: (
+              state.previewMetadata?.setVariableHistory ?? []
+            ).concat(newSetVariableHistory),
+          },
+    },
+    newSetVariableHistory,
+  }
+}
 
-const updateTypebotVariables =
-  (typebot: { variables: Variable[] }) =>
-  (newVariables: VariableWithUnknowValue[]): Variable[] => {
-    const serializedNewVariables = newVariables.map((variable) => ({
-      ...variable,
-      value: Array.isArray(variable.value)
-        ? variable.value.map(safeStringify)
-        : safeStringify(variable.value),
-    }))
+const updateTypebotVariables = ({
+  state,
+  newVariables,
+  currentBlockId,
+}: {
+  state: SessionState
+  newVariables: VariableWithUnknowValue[]
+  currentBlockId: string | undefined
+}): {
+  updatedVariables: Variable[]
+  newSetVariableHistory: SetVariableHistoryItem[]
+  setVariableHistoryIndex: number
+} => {
+  const serializedNewVariables = newVariables.map((variable) => ({
+    ...variable,
+    value: Array.isArray(variable.value)
+      ? variable.value.map(safeStringify)
+      : safeStringify(variable.value),
+  }))
 
-    return [
-      ...typebot.variables.filter((existingVariable) =>
+  let setVariableHistoryIndex = state.currentSetVariableHistoryIndex ?? 0
+  const setVariableHistory: SetVariableHistoryItem[] = []
+  if (currentBlockId) {
+    serializedNewVariables
+      .filter((v) => state.setVariableIdsForHistory?.includes(v.id))
+      .forEach((newVariable) => {
+        setVariableHistory.push({
+          resultId: state.typebotsQueue[0].resultId as string,
+          index: setVariableHistoryIndex,
+          blockId: currentBlockId,
+          variableId: newVariable.id,
+          value: newVariable.value,
+        })
+        setVariableHistoryIndex += 1
+      })
+  }
+
+  return {
+    updatedVariables: [
+      ...state.typebotsQueue[0].typebot.variables.filter((existingVariable) =>
         serializedNewVariables.every(
           (newVariable) => existingVariable.id !== newVariable.id
         )
       ),
       ...serializedNewVariables,
-    ]
+    ],
+    newSetVariableHistory: setVariableHistory,
+    setVariableHistoryIndex,
   }
+}