Add error handling for when the profile file yaml parsing fails (#1523)

Use various error messages basd on what's missing from the profile import file

src/components/profiles-modals/ImportProfileModal.vue

@@ -121,7 +121,14 @@ export default class ImportProfileModal extends mixins(ProfilesMixin) {
 
         if (read !== null) {
             this.profileImportFilePath = files[0];
-            this.profileImportContent = await ProfileUtils.parseYamlToExportFormat(read);
+            try {
+                this.profileImportContent = await ProfileUtils.parseYamlToExportFormat(read);
+            } catch (e: unknown) {
+                const err = R2Error.fromThrownValue(e);
+                this.$store.commit('error/handleError', err)
+                this.closeModal();
+                return;
+            }
 
             if (this.profileToOnlineMods.length === 0) {
                 this.activeStep = 'NO_PACKAGES_IN_IMPORT';

src/utils/ProfileUtils.ts

@@ -125,6 +125,27 @@ export async function installModsToProfile(
 
 export async function parseYamlToExportFormat(yamlContent: string) {
     const parsedYaml = await yaml.parse(yamlContent);
+    if (!parsedYaml) {
+        throw new R2Error(
+            'Failed to parse yaml contents.',
+            'Yaml parsing failed when trying to import profile via file (The contents of export.r2x file are invalid).',
+            'Ensure that the profile import file isn\'t corrupted.'
+        )
+    }
+    if (typeof parsedYaml.profileName !== 'string') {
+        throw new R2Error(
+            'Failed to read profile name.',
+            'Reading the profile name after parsing the yaml failed (export.r2x is missing the profileName field).',
+            'Ensure that the profile import file isn\'t corrupted.'
+        )
+    }
+    if (!Array.isArray(parsedYaml.mods)) {
+        throw new R2Error(
+            'Failed to read mod list.',
+            'Reading mods list after parsing the yaml failed (Mod list of export.r2x is invalid).',
+            'Ensure that the profile import file isn\'t corrupted.'
+        )
+    }
     return new ExportFormat(
         parsedYaml.profileName,
         parsedYaml.mods.map((mod: any) => {