Add some useful CLI options

src/cli/index.ts

@@ -13,6 +13,8 @@ const getOptions = () => program
   .option("-f, --force", "overrides the existing things with new schemas", false)
   .option("-n, --dry-run", "disables all mutations against OpenHAB (data creating, updating or deletion), only data retrieval will be allowed", false)  
   .option("-j, --json", "prints things to be imported as a JSON", false)
+  .option("-w, --where <condition>", "filters the things using JS query with the special '$' variable representing a single thing to be imported")
+  .option("-p, --print", "prints the UIDs and thing names", false)
   .parse()
   .opts<CLIOptions>();
 
@@ -44,4 +46,8 @@ export const run = async () => {
   if(options.json) {
     console.log(JSON.stringify(things, undefined, 3));
   }
+
+  if(options.print) {
+    things.forEach(t => console.log(`${t.UID} ==> ${t.label}`))
+  }
 }

src/importer/index.ts

@@ -1,4 +1,4 @@
-import { Config, ImportOptions } from "@types";
+import { Config, ImportOptions, Thing } from "@types";
 import { adapters } from "../adapters";
 import { DummyOpenHAB, OpenHAB } from "../openhab";
 
@@ -27,7 +27,15 @@ export const importThings = async (config: Config, options: ImportOptions) => {
 
   const existingThings = await openhab.getThings();
   const existingThingsUIDs = existingThings.map(t => t.UID);  
-  const thingsToImport = things.filter(t => !existingThingsUIDs.includes(t.UID));
+
+  const filter: (thing: Thing) => boolean = options.where 
+    ? (new Function("$", `return ${options.where}`)) as ((_: Thing) => true)
+    : (_: Thing) => true;
+  
+  const thingsToImport = things
+    .filter(t => !existingThingsUIDs.includes(t.UID))
+    .filter(filter);
+
 
   return thingsToImport;
 }

src/types/importer.ts

@@ -1,5 +1,7 @@
 export type ImportOptions = {
   force: boolean;
   dryRun: boolean;
+  print: boolean;
   sources?: string[];
+  where?: string;  
 };