feat: reorganize builder

lib/file/BlueprintFileReader.js

@@ -0,0 +1,42 @@
+const fs = require("fs");
+
+/**
+ * Handles reading Blueprint files from the file system.
+ */
+class BlueprintFileReader {
+  /**
+   * Creates a new BlueprintFileReader instance.
+   * @param {Object} [options] - Options object
+   * @param {boolean} [options.debug=false] - Enable debug logging
+   */
+  constructor(options = {}) {
+    this.options = {
+      debug: false,
+      ...options,
+    };
+  }
+
+  /**
+   * Reads a Blueprint file from the file system.
+   * @param {string} inputPath - Path to the Blueprint file
+   * @returns {string} - The content of the file
+   * @throws {Error} - If the file does not exist or has an invalid extension
+   */
+  readFile(inputPath) {
+    if (this.options.debug) {
+      console.log(`[DEBUG] Reading Blueprint file: ${inputPath}`);
+    }
+
+    if (!inputPath.endsWith(".bp")) {
+      throw new Error("Input file must have .bp extension");
+    }
+
+    if (!fs.existsSync(inputPath)) {
+      throw new Error(`File not found: ${inputPath}`);
+    }
+
+    return fs.readFileSync(inputPath, "utf8");
+  }
+}
+
+module.exports = BlueprintFileReader;