1 files changed, 26 insertions, 0 deletions
diff --git a/app/assets/javascripts/locale/sprintf.js b/app/assets/javascripts/locale/sprintf.js
new file mode 100644
index 00000000000..5f4a053f98e
--- /dev/null
+++ b/app/assets/javascripts/locale/sprintf.js
@@ -0,0 +1,26 @@
+import _ from 'underscore';
+
+/**
+  Very limited implementation of sprintf supporting only named parameters.
+
+  @param input (translated) text with parameters (e.g. '%{num_users} users use us')
+  @param parameters object mapping parameter names to values (e.g. { num_users: 5 })
+  @param escapeParameters whether parameter values should be escaped (see http://underscorejs.org/#escape)
+  @returns {String} the text with parameters replaces (e.g. '5 users use us')
+
+  @see https://ruby-doc.org/core-2.3.3/Kernel.html#method-i-sprintf
+  @see https://gitlab.com/gitlab-org/gitlab-ce/issues/37992
+**/
+export default (input, parameters, escapeParameters = true) => {
+  let output = input;
+
+  if (parameters) {
+    Object.keys(parameters).forEach((parameterName) => {
+      const parameterValue = parameters[parameterName];
+      const escapedParameterValue = escapeParameters ? _.escape(parameterValue) : parameterValue;
+      output = output.replace(new RegExp(`%{${parameterName}}`, 'g'), escapedParameterValue);
+    });
+  }
+
+  return output;
+};