store and read data in ~/.cache/countries

1 files changed, 39 insertions, 0 deletions

diff --git a/util/cache.ts b/util/cache.ts
new file mode 100644
index 0000000..3a0c5d4
--- /dev/null
+++ b/util/cache.ts
@@ -0,0 +1,39 @@
+import { join } from "https://deno.land/[email protected]/path/mod.ts";
+import { ensureDirSync } from "https://deno.land/[email protected]/fs/mod.ts";
+import { environment } from "../environment/environment.ts";
+
+export class Cache {
+  path = environment.cacheDir;
+
+  public saveJson(name: string, data: {}) {
+    ensureDirSync(this.path);
+
+    Deno.writeTextFileSync(
+      join(this.path, `${name}.json`),
+      JSON.stringify(data)
+    );
+  }
+
+  public saveTxt(name: string, value: string) {
+    ensureDirSync(this.path);
+    Deno.writeTextFileSync(join(this.path, `${name}.txt`), value);
+  }
+
+  public readJson(name: string): {} | [] | undefined {
+    let data;
+    try {
+      data = Deno.readTextFileSync(join(this.path, `${name}.json`));
+    } catch (err) {
+      return undefined;
+    }
+    return JSON.parse(data);
+  }
+
+  public readTxt(name: string) {
+    try {
+      return Deno.readTextFileSync(join(this.path, `${name}.txt`));
+    } catch (err) {
+      return undefined;
+    }
+  }
+}