Port Comp_iler to Myriad (#8)

src/struct/Myriad.js

@@ -0,0 +1,87 @@
+const fetch = require('node-fetch');
+
+class Myriad {
+    constructor(port) {
+        this.port = port;
+    }
+
+    url(k) {
+        return `http://localhost:${this.port}/${k}`;
+    }
+
+    getLanguages() {
+        return fetch(this.url('languages'), { method: 'GET' }).then(x => x.json());
+    }
+
+    async postEval(language, code) {
+        const response = await fetch(this.url('eval'), {
+            method: 'POST',
+            body: JSON.stringify({ language, code }),
+            headers: { 'Content-Type': 'application/json' }
+        });
+
+        if (!response.ok) {
+            if (response.status === 404 && /^Language .+? was not found$/.test(response.statusText)) {
+                return [false, 'Invalid language'];
+            }
+
+            if (response.status === 500 && response.statusText === 'Evaluation failed') {
+                return [false, 'Evaluation failed'];
+            }
+
+            if (response.status === 504 && response.statusText === 'Evaluation timed out') {
+                return [false, 'Evaluation timed out'];
+            }
+
+            throw new Error(`Unexpected ${response.status} response from ['Myriad', ${response.statusText}`);
+        }
+
+        const body = await response.json();
+        return [true, body.result || '\n'];
+    }
+
+    getContainers() {
+        return fetch(this.url('containers'), { method: 'GET' }).then(x => x.json());
+    }
+
+    postCleanup() {
+        return fetch(this.url('cleanup'), { method: 'POST' }).then(x => x.json());
+    }
+}
+
+const entries = [
+    ['apl', ['apl']],
+    ['bash', ['bash', 'sh']],
+    ['brainfuck', ['brainfuck', 'bf']],
+    ['c', ['c']],
+    ['clojure', ['clojure', 'clj']],
+    ['cpp', ['cpp']],
+    ['csharp', ['csharp', 'cs']],
+    ['elixir', ['elixir']],
+    ['fsharp', ['fsharp', 'fs']],
+    ['go', ['golang', 'go']],
+    ['haskell', ['haskell', 'hs']],
+    ['java', ['java']],
+    ['javascript', ['javascript', 'js']],
+    ['julia', ['julia']],
+    ['lua', ['lua']],
+    ['ocaml', ['ocaml', 'ml']],
+    ['pascal', ['pascal', 'pas', 'freepascal']],
+    ['perl', ['perl', 'pl']],
+    ['php', ['php']],
+    ['prolog', ['prolog']],
+    ['python', ['python', 'py']],
+    ['racket', ['lisp']],
+    ['ruby', ['ruby', 'rb']],
+    ['rust', ['rust', 'rs']]
+];
+
+Myriad.Languages = new Map(entries);
+Myriad.Aliases = new Map();
+for (const [l, xs] of entries) {
+    for (const x of xs) {
+        Myriad.Aliases.set(x, l);
+    }
+}
+
+module.exports = Myriad;