1 files changed, 94 insertions, 0 deletions
diff --git a/src/console/reducers/index.js b/src/console/reducers/index.js
new file mode 100644
index 0000000..ee9c691
--- /dev/null
+++ b/src/console/reducers/index.js
@@ -0,0 +1,94 @@
+import actions from 'console/actions';
+
+const defaultState = {
+  errorShown: false,
+  errorText: '',
+  commandShown: false,
+  commandText: '',
+  completions: [],
+  groupSelection: -1,
+  itemSelection: -1,
+};
+
+const nextSelection = (state) => {
+  if (state.groupSelection < 0) {
+    return [0, 0];
+  }
+
+  let group = state.completions[state.groupSelection];
+  if (state.groupSelection + 1 >= state.completions.length &&
+    state.itemSelection + 1 >= group.items.length) {
+    return [-1, -1];
+  }
+  if (state.itemSelection + 1 >= group.items.length) {
+    return [state.groupSelection + 1, 0];
+  }
+  return [state.groupSelection, state.itemSelection + 1];
+};
+
+const prevSelection = (state) => {
+  if (state.groupSelection < 0) {
+    return [
+      state.completions.length - 1,
+      state.completions[state.completions.length - 1].items.length - 1
+    ];
+  }
+  if (state.groupSelection === 0 && state.itemSelection === 0) {
+    return [-1, -1];
+  } else if (state.itemSelection === 0) {
+    return [
+      state.groupSelection - 1,
+      state.completions[state.groupSelection - 1].items.length - 1
+    ];
+  }
+  return [state.groupSelection, state.itemSelection - 1];
+};
+
+export default function reducer(state = defaultState, action = {}) {
+  switch (action.type) {
+  case actions.CONSOLE_SHOW_COMMAND:
+    return Object.assign({}, state, {
+      commandShown: true,
+      commandText: action.text,
+      errorShown: false,
+      completions: []
+    });
+  case actions.CONSOLE_SHOW_ERROR:
+    return Object.assign({}, state, {
+      errorText: action.text,
+      errorShown: true,
+      commandShown: false,
+    });
+  case actions.CONSOLE_HIDE:
+    if (state.errorShown) {
+      // keep error message if shown
+      return state;
+    }
+    return Object.assign({}, state, {
+      errorShown: false,
+      commandShown: false
+    });
+  case actions.CONSOLE_SET_COMPLETIONS:
+    return Object.assign({}, state, {
+      completions: action.completions,
+      groupSelection: -1,
+      itemSelection: -1,
+    });
+  case actions.CONSOLE_COMPLETION_NEXT: {
+    let next = nextSelection(state);
+    return Object.assign({}, state, {
+      groupSelection: next[0],
+      itemSelection: next[1],
+    });
+  }
+  case actions.CONSOLE_COMPLETION_PREV: {
+    let next = prevSelection(state);
+    return Object.assign({}, state, {
+      groupSelection: next[0],
+      itemSelection: next[1],
+    });
+  }
+  default:
+    return state;
+  }
+}