Update .gitignore, add dist directory

dist/lib/grab-duplicate-safe-insert-sql.js

@@ -0,0 +1,25 @@
+function quoteIdentifier(identifier) {
+    return `\`${identifier.replace(/`/g, "``")}\``;
+}
+export default async function ({ sql: passedSql, table, data }) {
+    const config = global.CONFIG;
+    const dbSchema = global.DB_SCHEMA;
+    const tableSchema = dbSchema?.tables.find((t) => t.tableName == table);
+    if (!tableSchema?.tableName) {
+        return passedSql;
+    }
+    const dataObject = Array.isArray(data) ? data[0] : data;
+    const dataKeys = Object.keys(dataObject || {});
+    if (dataKeys.length === 0) {
+        return passedSql;
+    }
+    const hasUniqueField = tableSchema.fields.some((field) => field.unique) || Boolean(tableSchema.uniqueConstraints?.length);
+    if (!hasUniqueField) {
+        return passedSql;
+    }
+    const setSql = dataKeys
+        .filter((field) => field !== "updated_at")
+        .map((field) => `${quoteIdentifier(field)} = VALUES(${quoteIdentifier(field)})`);
+    setSql.push(`updated_at = ${Date.now()}`);
+    return `${passedSql} ON DUPLICATE KEY UPDATE ${setSql.join(", ")}`;
+}