Switch from ajv to io-ts for config validation; validate configs on save in the API/dashboard; start work on creating io-ts schemas for all plugins

src/plugins/GlobalZeppelinPlugin.ts

@@ -0,0 +1,39 @@
+import { GlobalPlugin, IBasePluginConfig, IPluginOptions, logger } from "knub";
+import { PluginRuntimeError } from "../PluginRuntimeError";
+import * as t from "io-ts";
+import { pipe } from "fp-ts/lib/pipeable";
+import { fold } from "fp-ts/lib/Either";
+import { PathReporter } from "io-ts/lib/PathReporter";
+import { isSnowflake, isUnicodeEmoji, resolveMember, resolveUser, UnknownUser } from "../utils";
+import { Member, User } from "eris";
+import { performance } from "perf_hooks";
+import { validateStrict } from "../validatorUtils";
+
+const SLOW_RESOLVE_THRESHOLD = 1500;
+
+export class GlobalZeppelinPlugin<TConfig extends {} = IBasePluginConfig> extends GlobalPlugin<TConfig> {
+  protected static configSchema: t.TypeC<any>;
+  public static dependencies = [];
+
+  public static validateOptions(options: IPluginOptions): string[] | null {
+    // Validate config values
+    if (this.configSchema) {
+      if (options.config) {
+        const errors = validateStrict(this.configSchema, options.config);
+        if (errors) return errors;
+      }
+
+      if (options.overrides) {
+        for (const override of options.overrides) {
+          if (override.config) {
+            const errors = validateStrict(this.configSchema, override.config);
+            if (errors) return errors;
+          }
+        }
+      }
+    }
+
+    // No errors, return null
+    return null;
+  }
+}