added mongo mapper for select quires

Author: ariflogs

src/config/mapping.ts

@@ -0,0 +1,22 @@
+export const sqlToMongoDBcommandsMapping = {
+  select: "find",
+  insert: "insertOne",
+  update: "updateOne",
+  delete: "deleteOne",
+};
+
+export const sqlToMongoDBoperatorsMapping = {
+  "=": "$eq",
+  ">": "$gt",
+  "<": "$lt",
+  ">=": "$gte",
+  "<=": "$lte",
+  "<>": "$ne",
+};
+
+export const mappings = {
+  mongodb: {
+    commands: sqlToMongoDBcommandsMapping,
+    operators: sqlToMongoDBoperatorsMapping,
+  },
+};

src/index.ts

@@ -1,3 +1,4 @@
+import { mappings } from "./config/mapping.js";
 import { parseQuery } from "./utils/parser.js";
 
 export const SqlToNoSql = (query: string) => {
@@ -10,7 +11,30 @@ export const SqlToNoSql = (query: string) => {
   }
 
   const q = parseQuery(query);
-  return q;
+
+  const filters: {
+    [key: string]: {
+      [operator: string]: string | number;
+    };
+  } = {};
+
+  q.filters?.forEach((filter) => {
+    const { column, operator, value } = filter;
+
+    if (!filters[column]) {
+      filters[column] = {
+        [mappings["mongodb"]["operators"][operator]]: value,
+      };
+    }
+  });
+
+  const mongoQuery = {
+    collection: q.table,
+    [q.command]: mappings["mongodb"]["commands"][q.command],
+    query: filters,
+  };
+
+  return mongoQuery;
 };
 
 console.log(SqlToNoSql("SELECT * FROM users"));