Add getComputedProperties logic

Author: michalsnik

lib/rules/no-side-effects-in-computed-properties.js

@@ -6,8 +6,42 @@
 
 const utils = require('../utils')
 
+function getComputedProperties (componentProperties) {
+  const computedPropertiesNode = componentProperties
+    .filter(p =>
+      p.key.type === 'Identifier' &&
+      p.key.name === 'computed' &&
+      p.value.type === 'ObjectExpression'
+    )[0]
+
+  if (!computedPropertiesNode) { return [] }
+
+  const computedProperties = computedPropertiesNode.value.properties
+
+  return computedProperties.map(cp => {
+    const key = cp.key.name
+    let value
+
+    if (cp.value.type === 'FunctionExpression') {
+      value = cp.value.body.body
+    } else if (cp.value.type === 'ObjectExpression') {
+      value = cp.value.properties
+        .filter(p =>
+          p.key.type === 'Identifier' &&
+          p.key.name === 'get' &&
+          p.value.type === 'FunctionExpression'
+        )
+        .map(p => p.value.body.body)[0]
+    }
+
+    return { key, value }
+  })
+}
+
 function create (context) {
   return utils.executeOnVueComponent(context, (properties) => {
+    const computedProperties = getComputedProperties(properties)
+    // to be continued...
   })
 }