feat: introduce streamers that handle the stream and anonymization from github

src/core/AnonymousError.ts

@@ -0,0 +1,53 @@
+import { CustomError } from "ts-custom-error";
+import AnonymizedFile from "./AnonymizedFile";
+import Repository from "./Repository";
+import GitHubBase from "./source/GitHubBase";
+import { GitHubRepository } from "./source/GitHubRepository";
+import User from "./User";
+
+/**
+ * Custom error message
+ */
+export default class AnonymousError extends CustomError {
+  value?: any;
+  httpStatus?: number;
+  cause?: Error;
+
+  constructor(
+    message: string,
+    opt?: {
+      httpStatus?: number;
+      cause?: Error;
+      object?: any;
+    }
+  ) {
+    super(message);
+    this.value = opt?.object;
+    this.httpStatus = opt?.httpStatus;
+    this.cause = opt?.cause;
+  }
+
+  toString(): string {
+    let out = "";
+    let detail = this.value ? JSON.stringify(this.value) : null;
+    if (this.value instanceof Repository) {
+      detail = this.value.repoId;
+    } else if (this.value instanceof AnonymizedFile) {
+      detail = `/r/${this.value.repository.repoId}/${this.value.anonymizedPath}`;
+    } else if (this.value instanceof GitHubRepository) {
+      detail = `${this.value.fullName}`;
+    } else if (this.value instanceof User) {
+      detail = `${this.value.username}`;
+    } else if (this.value instanceof GitHubBase) {
+      detail = `GHDownload ${this.value.data.repoId}`;
+    }
+    out += this.message;
+    if (detail) {
+      out += `: ${detail}`;
+    }
+    if (this.cause) {
+      out += `\n\tCause by ${this.cause}\n${this.cause.stack}`;
+    }
+    return out;
+  }
+}