1 files changed, 102 insertions, 0 deletions
diff --git a/src/console/reducers/index.ts b/src/console/reducers/index.ts
new file mode 100644
index 0000000..614a72f
--- /dev/null
+++ b/src/console/reducers/index.ts
@@ -0,0 +1,102 @@
+import actions from 'console/actions';
+
+const defaultState = {
+  mode: '',
+  messageText: '',
+  consoleText: '',
+  completionSource: '',
+  completions: [],
+  select: -1,
+  viewIndex: 0,
+};
+
+const nextSelection = (state) => {
+  if (state.completions.length === 0) {
+    return -1;
+  }
+  if (state.select < 0) {
+    return 0;
+  }
+
+  let length = state.completions
+    .map(g => g.items.length)
+    .reduce((x, y) => x + y);
+  if (state.select + 1 < length) {
+    return state.select + 1;
+  }
+  return -1;
+};
+
+const prevSelection = (state) => {
+  let length = state.completions
+    .map(g => g.items.length)
+    .reduce((x, y) => x + y);
+  if (state.select < 0) {
+    return length - 1;
+  }
+  return state.select - 1;
+};
+
+const nextConsoleText = (completions, select, defaults) => {
+  if (select < 0) {
+    return defaults;
+  }
+  let items = completions.map(g => g.items).reduce((g1, g2) => g1.concat(g2));
+  return items[select].content;
+};
+
+// eslint-disable-next-line max-lines-per-function
+export default function reducer(state = defaultState, action = {}) {
+  switch (action.type) {
+  case actions.CONSOLE_HIDE:
+    return { ...state,
+      mode: '', };
+  case actions.CONSOLE_SHOW_COMMAND:
+    return { ...state,
+      mode: 'command',
+      consoleText: action.text,
+      completions: []};
+  case actions.CONSOLE_SHOW_FIND:
+    return { ...state,
+      mode: 'find',
+      consoleText: '',
+      completions: []};
+  case actions.CONSOLE_SHOW_ERROR:
+    return { ...state,
+      mode: 'error',
+      messageText: action.text, };
+  case actions.CONSOLE_SHOW_INFO:
+    return { ...state,
+      mode: 'info',
+      messageText: action.text, };
+  case actions.CONSOLE_HIDE_COMMAND:
+    return {
+      ...state,
+      mode: state.mode === 'command' || state.mode === 'find' ? '' : state.mode,
+    };
+  case actions.CONSOLE_SET_CONSOLE_TEXT:
+    return { ...state,
+      consoleText: action.consoleText, };
+  case actions.CONSOLE_SET_COMPLETIONS:
+    return { ...state,
+      completions: action.completions,
+      completionSource: action.completionSource,
+      select: -1 };
+  case actions.CONSOLE_COMPLETION_NEXT: {
+    let select = nextSelection(state);
+    return { ...state,
+      select: select,
+      consoleText: nextConsoleText(
+        state.completions, select, state.completionSource) };
+  }
+  case actions.CONSOLE_COMPLETION_PREV: {
+    let select = prevSelection(state);
+    return { ...state,
+      select: select,
+      consoleText: nextConsoleText(
+        state.completions, select, state.completionSource) };
+  }
+  default:
+    return state;
+  }
+}