popup/tabswiper: extract store

popup/tabswiper/modules/store.js

@@ -0,0 +1,55 @@
+export const init = ({
+  tabs: browserTabs,
+  onStateUpdate,
+}) => {
+  /* Initial state */
+  const state = {
+    tabs: [],
+    skipped: [],
+    currentTab: null,
+  }
+
+  /* */
+
+  const fetchTabs = () =>
+    browserTabs.query({ currentWindow: true })
+      .then((tabs) => tabs.reverse())
+      .then((tabs) => void (state.tabs = tabs))
+
+  const setCurrent = () => {
+    const untouchedTabs = state.tabs
+      .filter(({ id }) => state.skipped.includes(id) === false)
+    state.currentTab = untouchedTabs[0] ?? null
+  }
+
+  /* */
+
+  const updateState = () =>
+    fetchTabs()
+      .then(setCurrent)
+      .then(() => onStateUpdate(state))
+
+  updateState()
+
+  /* */
+
+  return {
+    getCurrentState() {
+      return state
+    },
+    actions: {
+      keepTab() {
+        state.skipped.push(state.currentTab.id)
+        updateState()
+      },
+      goToTab() {
+        browserTabs.update(state.currentTab.id, { active: true })
+          .then(updateState)
+      },
+      closeTab() {
+        browserTabs.remove(state.currentTab.id)
+          .then(updateState)
+      },
+    },
+  }
+}