Query builder

src/builder.ts

@@ -0,0 +1,55 @@
+import { onUser, onProject } from './nodes'
+import { User, Project } from './queries'
+
+interface INode {
+  user: (...args: any) => string,
+  project: (...args: any) => string
+}
+
+interface IQuery {
+  user: (...args: any) => string,
+  project: (...args: any) => string
+}
+export default class QueryBuilder {
+  private _query: string
+  private _nodeTitleMap: INode = {
+    user: onUser,
+    project: onProject
+  }
+
+  private _queryTitleMap: IQuery = {
+    user: User,
+    project: Project
+  }
+
+  on (node: keyof INode, params: Record<string, string | number>) {
+    const args = Object.entries(params).map(([, val]) => val)
+    const nodeFragment = this._nodeTitleMap[node](...args)
+    const regex = new RegExp(node, 'g')
+
+    this._query = this._query.replace(regex, nodeFragment)
+    return this
+  }
+
+  get query () {
+    return this._query
+  }
+
+  request (query: keyof IQuery, params: Record<string, string | number>) {
+    const args = Object.entries(params).map(([, val]) => val)
+
+    this._query = this._queryTitleMap[query](...args)
+    return this
+  }
+}
+
+const QB = new QueryBuilder()
+
+const query = QB.request('user', {
+  fields: 'id email age project',
+  login: 'ioedeveloper'
+}).on('project', {
+  fields: 'name dateCreated'
+}).query
+
+console.log('query: ', query)