fix: Add _ as a prefix for cache variables

Author: MichelRibeiro1

src/target/typescript_nodeserver.cr

@@ -135,17 +135,18 @@ END
       @io << "\n"
       @io << ident ident "if (cacheConfig.#{op.pretty_name}) {\n"
       @io << ident ident ident "try {\n"
-      @io << ident ident ident ident "const {key: cacheKey, expirationSeconds: cacheExpirationSeconds, version: cacheVersion} = await cacheConfig.#{op.pretty_name}(#{(["ctx"] + op.args.map(&.name)).join(", ")});\n"
-      @io << ident ident ident ident "if (!key) throw \"\";\n"
-      @io << ident ident ident ident "const cacheKeyEncoded = crypto.createHash(\"sha256\").update(JSON.stringify(cacheKey)+ \"-#{op.pretty_name}\").digest(\"hex\").substr(0, 100); decodedKey = JSON.stringify(cacheKey);\n"
+      @io << ident ident ident ident "const {key: _cacheKey, expirationSeconds: _cacheExpirationSeconds, version: _cacheVersion} = await cacheConfig.#{op.pretty_name}(#{(["ctx"] + op.args.map(&.name)).join(", ")});\n"
+      @io << ident ident ident ident "if (!_cacheKey) throw \"\";\n"
+      @io << ident ident ident ident "const cacheKeyEncoded = crypto.createHash(\"sha256\").update(JSON.stringify(_cacheKey)+ \"-#{op.pretty_name}\").digest(\"hex\").substr(0, 100);\n"
       @io << ident ident ident ident "const decodedKey = JSON.stringify(_cacheKey);\n"
+      @io << ident ident ident ident "const cache = await hook.getCache(cacheKeyEncoded, _cacheVersion);\n"
       @io << ident ident ident ident "if (cache && (!cache.expirationDate || cache.expirationDate > new Date())) return cache.ret;\n"
       @io << ident ident ident "} catch(e) {console.log(JSON.stringify(e));}\n"
       @io << ident ident "}\n"
       @io << ident ident "const ret = await fn.#{op.pretty_name}(#{(["ctx"] + op.args.map(&.name)).join(", ")});\n"
       @io << ident ident op.return_type.typescript_check_decoded("ret", "\"#{op.pretty_name}.ret\"")
       @io << ident ident "const encodedRet = " + op.return_type.typescript_encode("ret") + ";\n"
-      @io << ident ident "if (cacheKeyEncoded !== null && cacheVersion !== null) hook.setCache(cacheKeyEncoded, cacheExpirationSeconds ? new Date(new Date().getTime() + (cacheExpirationSeconds * 1000)) : null, cacheVersion, decodedKey!, \"#{op.pretty_name}\", encodedRet);\n"
+      @io << ident ident "if (cacheKeyEncoded !== null && _cacheVersion !== null) hook.setCache(cacheKeyEncoded, _cacheExpirationSeconds ? new Date(new Date().getTime() + (_cacheExpirationSeconds * 1000)) : null, _cacheVersion, decodedKey!, \"#{op.pretty_name}\", encodedRet);\n"
       @io << ident ident "return encodedRet"
       @io << ident "},\n"
     end