use reflow to migrate from flow to typescript

scm-ui/ui-webapp/src/modules/failure.ts

@@ -0,0 +1,89 @@
+import { Action } from '@scm-manager/ui-types';
+
+const FAILURE_SUFFIX = '_FAILURE';
+const RESET_PATTERN = /^(.*)_(SUCCESS|RESET)$/;
+
+function extractIdentifierFromFailure(action: Action) {
+  const type = action.type;
+  let identifier = type.substring(0, type.length - FAILURE_SUFFIX.length);
+  if (action.itemId) {
+    identifier += '/' + action.itemId;
+  }
+  return identifier;
+}
+
+function removeAllEntriesOfIdentifierFromState(
+  state: object,
+  payload: any,
+  identifier: string,
+) {
+  const newState = {};
+  for (let failureType in state) {
+    if (failureType !== identifier && !failureType.startsWith(identifier)) {
+      newState[failureType] = state[failureType];
+    }
+  }
+  return newState;
+}
+
+function removeFromState(state: object, identifier: string) {
+  const newState = {};
+  for (let failureType in state) {
+    if (failureType !== identifier) {
+      newState[failureType] = state[failureType];
+    }
+  }
+  return newState;
+}
+
+export default function reducer(
+  state: object = {},
+  action: Action = {
+    type: 'UNKNOWN',
+  },
+): object {
+  const type = action.type;
+  if (type.endsWith(FAILURE_SUFFIX)) {
+    const identifier = extractIdentifierFromFailure(action);
+    let payload;
+    if (action.payload instanceof Error) {
+      payload = action.payload;
+    } else if (action.payload) {
+      payload = action.payload.error;
+    }
+    return {
+      ...state,
+      [identifier]: payload,
+    };
+  } else {
+    const match = RESET_PATTERN.exec(type);
+    if (match) {
+      let identifier = match[1];
+      if (action.itemId) {
+        identifier += '/' + action.itemId;
+      }
+      if (action.payload)
+        return removeAllEntriesOfIdentifierFromState(
+          state,
+          action.payload,
+          identifier,
+        );
+      else return removeFromState(state, identifier);
+    }
+  }
+  return state;
+}
+
+export function getFailure(
+  state: object,
+  actionType: string,
+  itemId?: string | number,
+) {
+  if (state.failure) {
+    let identifier = actionType;
+    if (itemId) {
+      identifier += '/' + itemId;
+    }
+    return state.failure[identifier];
+  }
+}