Fix templated queries with 2+ variable occurrences (#168)

Author: mvanbrab

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Templated queries now also work for queries containing multiple occurrences of a template variable (#164).
 - Works when served from any base URL including a path (e.g. `https://www.example.com/your/preferred/path`) (#165).
 
 ## [1.4.0] - 2024-10-02

main/public/queries/musicians_variables_double.rq

@@ -0,0 +1,17 @@
+PREFIX schema: <http://schema.org/>
+
+SELECT ?name ?sameAs_url WHERE {
+  {
+    ?list schema:name ?listTitle;
+      schema:name ?name;
+      schema:genre $genre;
+      schema:sameAs ?sameAs_url;
+  }
+  UNION
+  {
+    ?list schema:name ?listTitle;
+      schema:name ?name;
+      schema:genre $genre;
+      schema:sameAs ?sameAs_url;
+  }
+}

main/src/config.json

@@ -368,6 +368,26 @@
         ]
       }
     },
+    {
+      "id": "9012",
+      "queryGroupId": "c-tst",
+      "queryLocation": "musicians_variables_double.rq",
+      "name": "A templated query about musicians (double results)",
+      "description": "This query tests whether a template variable is expanded more than once. If it works, this query will return all results twice.",
+      "icon": "MusicNoteIcon",
+      "variables": {
+        "genre": [
+          "\"Romantic\"",
+          "\"Baroque\"",
+          "\"Classical\""
+        ]
+      },
+      "comunicaContext": {
+        "sources": [
+          "http://localhost:8080/example/favourite-musicians"
+        ]
+      }
+    },
     {
       "id": "9020",
       "queryGroupId": "c-tst",

main/src/dataProvider/SparqlDataProvider.js

@@ -149,7 +149,7 @@ async function buildQueryText(query) {
 function replaceVariables(rawText, variables) {
   for (const [variableName, variableValue] of Object.entries(variables)) {
     // do not surround with double quotes here; add double quotes in the input if needed!
-    rawText = rawText.replace("$" + variableName, variableValue);
+    rawText = rawText.replaceAll("$" + variableName, variableValue);
   }
 
   return rawText;

test/cypress/e2e/templated-query.cy.js

@@ -39,6 +39,21 @@ describe("Templated query", () => {
           // cy.get('button').contains('Query').should("not.exist");  -> useless if we add a 'new query' button
   });
 
+  it("With 1 variables, double expansion", () => {
+    cy.visit("/");
+    cy.contains("For testing only").click();
+    cy.contains("A templated query about musicians (double results)").click();
+
+    cy.get('form').within(() => {
+      cy.get('#genre').click();
+    });
+    cy.get('li').contains('Romantic').click();
+
+    cy.get('button').contains('Query').click();
+    cy.contains("Finished in:");
+    cy.get('.column-name').find('span').should("have.length", 2);
+  });
+
   it("With 2 variables", () => {
     cy.visit("/");
     cy.contains("For testing only").click();