fix: Allow configuration of eye reasoner path

Author: joachimvh

packages/uma/bin/demo.ts

@@ -20,6 +20,7 @@ export const launch: () => Promise<void> = async () => {
 
   // variables['urn:uma:variables:policyDir'] = path.join(rootDir, './config/rules/policy');
   variables['urn:uma:variables:rulesDir'] = path.join(rootDir, './config/rules/n3');
+  variables['urn:uma:variables:eyePath'] = 'eye';
 
   variables['urn:uma:variables:mainModulePath'] = rootDir;
   variables['urn:uma:variables:customConfigPath'] = path.join(rootDir, './config/demo.json');

packages/uma/bin/main.ts

@@ -20,6 +20,7 @@ export const launch: () => Promise<void> = async () => {
 
   variables['urn:uma:variables:policyDir'] = path.join(rootDir, './config/rules/policy');
   variables['urn:uma:variables:rulesDir'] = path.join(rootDir, './config/rules/n3');
+  variables['urn:uma:variables:eyePath'] = 'eye';
 
   variables['urn:uma:variables:mainModulePath'] = rootDir;
   variables['urn:uma:variables:customConfigPath'] = path.join(rootDir, './config/default.json');

packages/uma/bin/odrl.ts

@@ -20,6 +20,7 @@ export const launch: () => Promise<void> = async () => {
 
     variables['urn:uma:variables:policyDir'] = path.join(rootDir, './config/rules/odrl');
     // variables['urn:uma:variables:rulesDir'] = path.join(rootDir, './config/rules/n3');
+    variables['urn:uma:variables:eyePath'] = 'eye';
 
     variables['urn:uma:variables:mainModulePath'] = rootDir;
     variables['urn:uma:variables:customConfigPath'] = path.join(rootDir, './config/odrl.json');

packages/uma/config/policies/authorizers/default.json

@@ -51,6 +51,7 @@
       "fallback": {
         "@id": "urn:uma:default:OdrlAuthorizer",
         "@type": "OdrlAuthorizer",
+        "eyePath": { "@id": "urn:uma:variables:eyePath" },
         "policies": {
           "@id": "urn:uma:default:RulesStorage",
           "@type": "DirectoryUCRulesStorage",

packages/uma/config/policies/authorizers/odrl.json

@@ -7,6 +7,7 @@
     {
       "@id": "urn:uma:default:Authorizer",
       "@type": "OdrlAuthorizer",
+      "eyePath": { "@id": "urn:uma:variables:eyePath" },
       "policies": {
         "@id": "urn:uma:default:RulesStorage",
         "@type": "DirectoryUCRulesStorage",

packages/uma/config/variables/default.json

@@ -26,6 +26,11 @@
         "comment": "Path to the directory containing the N3 rules.",
         "@id": "urn:uma:variables:rulesDir",
         "@type": "Variable"
+      },
+      {
+        "comment": "Path of the local eye reasoner.",
+        "@id": "urn:uma:variables:eyePath",
+        "@type": "Variable"
       }
     ]
   }

packages/uma/src/policies/authorizers/OdrlAuthorizer.ts

@@ -38,9 +38,11 @@ export class OdrlAuthorizer implements Authorizer {
      */
     constructor(
         private readonly policies: UCRulesStorage,
+        private readonly eyePath?: string,
     ) {
-        const engine = new ODRLEngineMultipleSteps(new EyeReasoner('/usr/local/bin/eye', ["--quiet", "--nope", "--pass-only-new"]));
-        // const engine = new ODRLEngineMultipleSteps();
+        const engine = eyePath ?
+          new ODRLEngineMultipleSteps(new EyeReasoner(eyePath, ["--quiet", "--nope", "--pass-only-new"])) :
+          new ODRLEngineMultipleSteps();
         this.odrlEvaluator = new ODRLEvaluator(engine);
     }