From d98e31af458ed42e678072879265267e8148c627 Mon Sep 17 00:00:00 2001
From: Henry Jameson <me@hjkos.com>
Date: Wed, 22 Jan 2020 02:44:39 +0200
Subject: [PATCH] snapshot/source mismatch case

---
 .../style_switcher/style_switcher.js          | 53 ++++++++++++++++---
 .../style_switcher/style_switcher.vue         | 18 ++++++-
 src/i18n/en.json                              |  7 ++-
 3 files changed, 68 insertions(+), 10 deletions(-)

diff --git a/src/components/style_switcher/style_switcher.js b/src/components/style_switcher/style_switcher.js
index 195c6b35..3b538ac7 100644
--- a/src/components/style_switcher/style_switcher.js
+++ b/src/components/style_switcher/style_switcher.js
@@ -160,6 +160,9 @@ export default {
             )
         }
       } else if (origin === 'localStorage') {
+        if (type === 'snapshot_source_mismatch') {
+          return t(pre + 'snapshot_source_mismatch')
+        }
         // FE upgraded from v2
         if (themeEngineVersion === 2) {
           return t(pre + 'upgraded_from_v2')
@@ -345,7 +348,10 @@ export default {
         source.radii = this.currentRadii
       }
 
-      const theme = this.previewTheme
+      const theme = {
+        themeEngineVersion: CURRENT_VERSION,
+        ...this.previewTheme
+      }
 
       return {
         // To separate from other random JSON files and possible future source formats
@@ -381,17 +387,34 @@ export default {
       const version = (origin === 'localstorage' && !theme.colors)
         ? 'l1'
         : fileVersion
+      const snapshotEngineVersion = (theme || {}).themeEngineVersion
       const themeEngineVersion = (source || {}).themeEngineVersion || 2
       const versionsMatch = themeEngineVersion === CURRENT_VERSION
+      console.log(
+        theme !== undefined,
+        source !== undefined,
+        themeEngineVersion !== snapshotEngineVersion
+      )
+      const sourceSnapshotMismatch = (
+        theme !== undefined &&
+          source !== undefined &&
+          themeEngineVersion !== snapshotEngineVersion
+      )
       // Force loading of source if user requested it or if snapshot
       // is unavailable
       const forcedSourceLoad = (source && forceUseSource) || !theme
-      if (!versionsMatch &&
+      if (!(versionsMatch && !sourceSnapshotMismatch) &&
           !forcedSourceLoad &&
           version !== 'l1' &&
           origin !== 'defaults'
       ) {
-        if (!theme) {
+        if (sourceSnapshotMismatch) {
+          this.themeWarning = {
+            origin,
+            themeEngineVersion,
+            type: 'snapshot_source_mismatch'
+          }
+        } else if (!theme) {
           this.themeWarning = {
             origin,
             noActionsPossible: true,
@@ -428,7 +451,19 @@ export default {
       }
       this.dismissWarning()
     },
-    loadThemeFromLocalStorage (confirmLoadSource = false) {
+    forceSnapshot() {
+      const { origin } = this.themeWarning
+      switch (origin) {
+        case 'localstorage':
+          this.loadThemeFromLocalStorage(false, true)
+          break
+        case 'file':
+          console.err('Forcing snapshout from file is not supported yet')
+          break
+      }
+      this.dismissWarning()
+    },
+    loadThemeFromLocalStorage (confirmLoadSource = false, forceSnapshot = false) {
       const {
         customTheme: theme,
         customThemeSource: source
@@ -442,7 +477,10 @@ export default {
         )
       } else {
         this.loadTheme(
-          { theme, source },
+          {
+            theme,
+            source: forceSnapshot ? theme : source
+          },
           'localStorage',
           confirmLoadSource
         )
@@ -451,7 +489,10 @@ export default {
     setCustomTheme () {
       this.$store.dispatch('setOption', {
         name: 'customTheme',
-        value: this.previewTheme
+        value: {
+          themeEngineVersion: CURRENT_VERSION,
+          ...this.previewTheme
+        }
       })
       this.$store.dispatch('setOption', {
         name: 'customThemeSource',
diff --git a/src/components/style_switcher/style_switcher.vue b/src/components/style_switcher/style_switcher.vue
index 79c2fcd3..793d68f1 100644
--- a/src/components/style_switcher/style_switcher.vue
+++ b/src/components/style_switcher/style_switcher.vue
@@ -7,7 +7,21 @@
         {{ themeWarningHelp }}
         </div>
         <div class="buttons">
-          <template v-if="themeWarning.noActionsPossible">
+          <template v-if="themeWarning.type === 'snapshot_source_mismatch'">
+            <button
+              class="btn"
+              @click="forceLoad"
+            >
+              {{ $t('settings.style.switcher.use_source') }}
+            </button>
+            <button
+              class="btn"
+              @click="dismissWarning"
+            >
+              {{ $t('settings.style.switcher.use_snapshot') }}
+            </button>
+          </template>
+          <template v-else-if="themeWarning.noActionsPossible">
             <button
               class="btn"
               @click="dismissWarning"
@@ -26,7 +40,7 @@
               class="btn"
               @click="dismissWarning"
             >
-              {{ $t('settings.style.switcher.use_snapshot') }}
+              {{ $t('settings.style.switcher.keep_as_is') }}
             </button>
           </template>
         </div>
diff --git a/src/i18n/en.json b/src/i18n/en.json
index 2622157a..81dde663 100644
--- a/src/i18n/en.json
+++ b/src/i18n/en.json
@@ -397,7 +397,9 @@
         "clear_all": "Clear all",
         "clear_opacity": "Clear opacity",
         "load_theme": "Load theme",
-        "use_snapshot": "Keep as is",
+        "keep_as_is": "Keep as is",
+        "use_snapshot": "Old version",
+        "use_source": "New version",
         "help": {
           "upgraded_from_v2": "PleromaFE has been upgraded, theme could look a little bit different than you remember.",
           "v2_imported": "File you imported was made for older FE. We try to maximize compatibility but there still could be inconsitencies.",
@@ -408,7 +410,8 @@
           "fe_upgraded": "PleromaFE's theme engine upgraded after version update.",
           "fe_downgraded": "PleromaFE's version rolled back.",
           "migration_snapshot_ok": "Just to be safe, theme snapshot loaded. You can try loading theme data.",
-          "migration_napshot_gone": "For whatever reason snapshot was missing, some stuff could look different than you remember."
+          "migration_napshot_gone": "For whatever reason snapshot was missing, some stuff could look different than you remember.",
+          "snapshot_source_mismatch": "Versions conflict: most likely FE was rolled back and updated again, if you changed theme using older version of FE you most likely want to use old version, otherwise use new version."
         }
       },
       "common": {