backend user input handling

backend/helpers/skillValidator.js

@@ -0,0 +1,100 @@
+const constants = require ('../config/constants');
+
+validateEmail = function (email) {
+  if (email.length > constants.stringConstraints.EMAIL_MAX_LENGTH) return false;
+  let validEmailRegex = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
+  return validEmailRegex.test (email);
+};
+
+validateIntentName = function (intentName) {
+  if (
+    intentName.length < constants.stringConstraints.INTENT_NAME_MIN_LENGTH ||
+    intentName.length > constants.stringConstraints.INTENT_NAME_MAX_LENGTH
+  )
+    return false;
+  let validIntentNameRegex = /^[a-z]*$/i;
+  return validIntentNameRegex.test (intentName);
+};
+
+validateQuestion = function (question) {
+  if (
+    question.length < constants.stringConstraints.QUESTION_MIN_LENGTH ||
+    question.length > constants.stringConstraints.QUESTION_MAX_LENGTH
+  )
+    return false;
+  let validQuestionNameRegex = /^[a-z,.' ]*$/i;
+  return validQuestionNameRegex.test (question);
+};
+
+validateAnswer = function (answer) {
+  if (
+    answer.length < constants.stringConstraints.ANSWER_MIN_LENGTH ||
+    answer.length > constants.stringConstraints.ANSWER_MAX_LENGTH
+  )
+    return false;
+  let validAnswerRegex = /^[a-z,.' ]*$/i;
+  return validAnswerRegex.test (answer);
+};
+
+validateInvocationName = function (invocationName) {
+  if (
+    invocationName.length < constants.stringConstraints.INVOCATION_NAME_MIN_LENGTH ||
+    invocationName.length > constants.stringConstraints.INVOCATION_NAME_MAX_LENGTH
+  )
+    return false;
+  let validInvocationNameRegex = /^[a-z,.' ]*$/i;
+  return validInvocationNameRegex.test (invocationName);
+};
+
+validateInvocationAnswer = function (invocationAnswer) {
+  if (invocationAnswer.length > constants.stringConstraints.INVOCATION_ANSWER_MAX_LENGTH)
+    return false;
+  let validInvocationAnswerRegex = /^[a-z,.' ]*$/i;
+  return validInvocationAnswerRegex.test (invocationAnswer);
+};
+
+validateIntentExplanation = function (explanation) {
+  if (explanation.length > constants.stringConstraints.INTENT_EXPLANATION_MAX_LENGTH)
+    return false;
+  let validExplanationRegex = /^[a-z,.' ]*$/i;
+  return validExplanationRegex.test (explanation);
+};
+
+module.exports = {
+  validateSkill: function (skill) {
+    try {
+      if (
+        !validateEmail (skill.contactEmail) ||
+        !validateInvocationName (skill.invocationName) ||
+        !validateInvocationAnswer (skill.invocationAnswer)
+      )
+        return false;
+
+      for (let i = 0; i < skill.intents.length; i++) {
+        if (!validateIntentName (skill.intents[i].intentName)) return false;
+        if (!validateAnswer (skill.intents[i].answer)) return false;
+
+        for (let j = 0; j < skill.intents.length; j++) {
+          if (i === j) continue;
+          if (skill.intents[i].intentName === skill.intents[j].intentName)
+            return false;
+        }
+
+        for (let j = 0; j < skill.intents[i].questions.length; j++) {
+          if (!validateQuestion (skill.intents[i].questions[j])) return false;
+
+          for (let k = 0; k < skill.intents[i].questions.length; k++) {
+            if (j === k) continue;
+            if (skill.intents[i].questions[j] === skill.intents[i].questions[k])
+              return false;
+          }
+        }
+      }
+
+      return true;
+    } catch (e) {
+      console.log ('Error : ' + e);
+      return false;
+    }
+  },
+};