chore: Replace campaign mixin with composable [CW-3463] (#9987)

# Pull Request Template

## Description

Repalces campaignMixin and its usage with the new useCampaign mixin

Fixes
https://linear.app/chatwoot/issue/CW-3463/rewrite-campaignmixin-mixin-to-a-composable

---------

Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/shared/composables/specs/useCampaign.spec.js

@@ -0,0 +1,47 @@
+import { describe, it, expect, vi } from 'vitest';
+import { useCampaign } from '../useCampaign';
+import { useRoute } from 'dashboard/composables/route';
+import { CAMPAIGN_TYPES } from '../../constants/campaign';
+
+// Mock the useRoute composable
+vi.mock('dashboard/composables/route', () => ({
+  useRoute: vi.fn(),
+}));
+
+describe('useCampaign', () => {
+  it('returns the correct campaign type for ongoing campaigns', () => {
+    useRoute.mockReturnValue({ name: 'ongoing_campaigns' });
+    const { campaignType } = useCampaign();
+    expect(campaignType.value).toBe(CAMPAIGN_TYPES.ONGOING);
+  });
+
+  it('returns the correct campaign type for one-off campaigns', () => {
+    useRoute.mockReturnValue({ name: 'one_off' });
+    const { campaignType } = useCampaign();
+    expect(campaignType.value).toBe(CAMPAIGN_TYPES.ONE_OFF);
+  });
+
+  it('isOngoingType returns true for ongoing campaigns', () => {
+    useRoute.mockReturnValue({ name: 'ongoing_campaigns' });
+    const { isOngoingType } = useCampaign();
+    expect(isOngoingType.value).toBe(true);
+  });
+
+  it('isOngoingType returns false for one-off campaigns', () => {
+    useRoute.mockReturnValue({ name: 'one_off' });
+    const { isOngoingType } = useCampaign();
+    expect(isOngoingType.value).toBe(false);
+  });
+
+  it('isOneOffType returns true for one-off campaigns', () => {
+    useRoute.mockReturnValue({ name: 'one_off' });
+    const { isOneOffType } = useCampaign();
+    expect(isOneOffType.value).toBe(true);
+  });
+
+  it('isOneOffType returns false for ongoing campaigns', () => {
+    useRoute.mockReturnValue({ name: 'ongoing_campaigns' });
+    const { isOneOffType } = useCampaign();
+    expect(isOneOffType.value).toBe(false);
+  });
+});

app/javascript/shared/composables/useCampaign.js

@@ -0,0 +1,43 @@
+import { computed } from 'vue';
+import { useRoute } from 'dashboard/composables/route';
+import { CAMPAIGN_TYPES } from '../constants/campaign';
+
+/**
+ * Composable to manage campaign types.
+ *
+ * @returns {Object} - Computed properties for campaign type and its checks.
+ */
+export const useCampaign = () => {
+  const route = useRoute();
+
+  /**
+   * Computed property to determine the current campaign type based on the route name.
+   */
+  const campaignType = computed(() => {
+    const campaignTypeMap = {
+      ongoing_campaigns: CAMPAIGN_TYPES.ONGOING,
+      one_off: CAMPAIGN_TYPES.ONE_OFF,
+    };
+    return campaignTypeMap[route.name];
+  });
+
+  /**
+   * Computed property to check if the current campaign type is 'ongoing'.
+   */
+  const isOngoingType = computed(() => {
+    return campaignType.value === CAMPAIGN_TYPES.ONGOING;
+  });
+
+  /**
+   * Computed property to check if the current campaign type is 'one-off'.
+   */
+  const isOneOffType = computed(() => {
+    return campaignType.value === CAMPAIGN_TYPES.ONE_OFF;
+  });
+
+  return {
+    campaignType,
+    isOngoingType,
+    isOneOffType,
+  };
+};