add campaign observability page

backend/services/campaignService.js

@@ -98,6 +98,128 @@ const countPendingBelowThresholdGroups = async () => {
     return result.rows[0]?.count || 0;
 };
 
+const getCampaignQueueRows = async () => {
+    const result = await pool.query(`
+        SELECT *
+        FROM stock_campaign_queue
+        ORDER BY created_at DESC, id DESC
+        LIMIT 500;
+    `);
+
+    return result.rows;
+};
+
+const groupCampaignRows = (rows) => {
+    return Object.values(rows.reduce((acc, row) => {
+        const key = `${row.base_product_name}:${row.status}`;
+        if (!acc[key]) {
+            acc[key] = {
+                key,
+                baseProductName: row.base_product_name,
+                status: row.status,
+                totalDelta: 0,
+                rowCount: 0,
+                attempts: 0,
+                lastError: null,
+                createdAt: row.created_at,
+                updatedAt: row.updated_at,
+                sentAt: row.sent_at,
+                items: []
+            };
+        }
+
+        acc[key].totalDelta += Number(row.delta_estoque || 0);
+        acc[key].rowCount += 1;
+        acc[key].attempts = Math.max(acc[key].attempts, Number(row.attempts || 0));
+        acc[key].lastError = row.last_error || acc[key].lastError;
+        acc[key].createdAt = new Date(row.created_at) < new Date(acc[key].createdAt) ? row.created_at : acc[key].createdAt;
+        acc[key].updatedAt = new Date(row.updated_at) > new Date(acc[key].updatedAt) ? row.updated_at : acc[key].updatedAt;
+        acc[key].sentAt = row.sent_at || acc[key].sentAt;
+        acc[key].items.push(row);
+        return acc;
+    }, {})).sort((a, b) => new Date(b.updatedAt).getTime() - new Date(a.updatedAt).getTime());
+};
+
+const getCampaignQueueSummary = async () => {
+    const rows = await getCampaignQueueRows();
+    return {
+        threshold: CAMPAIGN_DELTA_THRESHOLD,
+        maxAttempts: MAX_CAMPAIGN_ATTEMPTS,
+        groups: groupCampaignRows(rows),
+        rows
+    };
+};
+
+const getCampaignPreview = async () => {
+    const result = await pool.query(`
+        SELECT *
+        FROM stock_campaign_queue
+        WHERE status IN ('pending', 'failed')
+          AND attempts < $1
+        ORDER BY created_at ASC, id ASC;
+    `, [MAX_CAMPAIGN_ATTEMPTS]);
+    const groups = result.rows.reduce((acc, row) => {
+        if (!acc[row.base_product_name]) acc[row.base_product_name] = [];
+        acc[row.base_product_name].push(row);
+        return acc;
+    }, {});
+    const readyGroups = {};
+    const belowThresholdGroups = {};
+
+    Object.entries(groups).forEach(([baseProductName, items]) => {
+        const totalDelta = items.reduce((sum, item) => sum + Number(item.delta_estoque || 0), 0);
+        if (totalDelta >= CAMPAIGN_DELTA_THRESHOLD) {
+            readyGroups[baseProductName] = items;
+        } else {
+            belowThresholdGroups[baseProductName] = items;
+        }
+    });
+
+    const readyProducts = mapCampaignProducts(readyGroups).map(({ itemIds, ...product }) => product);
+    const belowThresholdProducts = mapCampaignProducts(belowThresholdGroups).map(({ itemIds, ...product }) => product);
+    const customers = await getTopBuyersAllTime();
+
+    return {
+        threshold: CAMPAIGN_DELTA_THRESHOLD,
+        readyProducts,
+        belowThresholdProducts,
+        productsText: readyProducts.length ? formatProductList(readyProducts.map(product => product.baseProduct)) : '',
+        customerCount: customers.length,
+        customersPreview: customers.slice(0, 10)
+    };
+};
+
+const retryCampaignItems = async ({ ids, baseProductName } = {}) => {
+    const params = [];
+    const filters = [`status IN ('failed', 'skipped')`];
+
+    if (Array.isArray(ids) && ids.length) {
+        params.push(ids.map(Number));
+        filters.push(`id = ANY($${params.length}::int[])`);
+    }
+
+    if (baseProductName) {
+        params.push(baseProductName);
+        filters.push(`base_product_name = $${params.length}`);
+    }
+
+    const result = await pool.query(`
+        UPDATE stock_campaign_queue
+        SET status = 'pending',
+            attempts = 0,
+            last_error = NULL,
+            sent_at = NULL,
+            updated_at = CURRENT_TIMESTAMP
+        WHERE ${filters.join(' AND ')}
+        RETURNING *;
+    `, params);
+
+    return {
+        retried: result.rowCount,
+        rows: result.rows
+    };
+};
+
 const updateCampaignItemsStatus = async (ids, status, errorMessage = null) => {
     if (!ids.length) return;
 
@@ -210,5 +332,8 @@ const processPendingStockCampaigns = async () => {
 
 module.exports = {
     enqueueStockCampaignItem,
+    getCampaignPreview,
+    getCampaignQueueSummary,
+    retryCampaignItems,
     processPendingStockCampaigns
 };