embed digest in DB as style.originalDigest

background.js

@@ -67,6 +67,24 @@ if ('commands' in chrome) {
         browserUIlanguage: UIlang,
       });
     }
+    // TODO: remove in the future
+    // embed style digests
+    chrome.storage.local.get(null, data => {
+      const digestKeys = Object.keys(data).filter(key => key.startsWith('originalDigest'));
+      if (!digestKeys.length) {
+        return;
+      }
+      chrome.storage.local.remove(digestKeys);
+      getStyles().then(styles => {
+        for (const style of styles) {
+          const digest = data['originalDigest' + style.id];
+          if (!style.originalDigest && digest) {
+            style.originalDigest = digest;
+            dbExec('put', style);
+          }
+        }
+      });
+    });
   };
   // bind for 60 seconds max and auto-unbind if it's a normal run
   chrome.runtime.onInstalled.addListener(onInstall);

backup/fileSaveLoad.js

@@ -60,9 +60,6 @@ function importFromString(jsonString) {
   const oldStylesByName = json.length && new Map(
     oldStyles.map(style => [style.name.trim(), style]));
 
-  let oldDigests;
-  chrome.storage.local.get(null, data => (oldDigests = data));
-
   const stats = {
     added:       {names: [], ids: [], legend: 'importReportLegendAdded'},
     unchanged:   {names: [], ids: [], legend: 'importReportLegendIdentical'},
@@ -220,7 +217,6 @@ function importFromString(jsonString) {
       deleteStyleSafe({id, notify: false}).then(id => {
         const oldStyle = oldStylesById.get(id);
         if (oldStyle) {
-          oldStyle.styleDigest = oldDigests[BG.DIGEST_KEY_PREFIX + id];
           saveStyleSafe(Object.assign(oldStyle, SAVE_OPTIONS))
             .then(undoNextId);
         } else {
@@ -282,14 +278,7 @@ function importFromString(jsonString) {
 
 
 $('#file-all-styles').onclick = () => {
-  Promise.all([
+  getStylesSafe().then(styles => {
-    BG.chromeLocal.get(null),
-    getStylesSafe(),
-  ]).then(([data, styles]) => {
-    styles = styles.map(style => {
-      const styleDigest = data[BG.DIGEST_KEY_PREFIX + style.id];
-      return styleDigest ? Object.assign({styleDigest}, style) : style;
-    });
     const text = JSON.stringify(styles, null, '\t');
     const url = 'data:text/plain;charset=utf-8,' + encodeURIComponent(text);
     return url;

storage.js

@@ -6,9 +6,6 @@ const RX_NAMESPACE = new RegExp([/[\s\r\n]*/,
 const RX_CSS_COMMENTS = /\/\*[\s\S]*?\*\//g;
 const SLOPPY_REGEXP_PREFIX = '\0';
 
-// eslint-disable-next-line no-var
-var DIGEST_KEY_PREFIX = 'originalDigest';
-
 // Note, only 'var'-declared variables are visible from another extension page
 // eslint-disable-next-line no-var
 var cachedStyles = {
@@ -232,21 +229,38 @@ function saveStyle(style) {
   const id = Number(style.id) || null;
   const reason = style.reason;
   const notify = style.notify !== false;
-  const styleDigest = style.styleDigest;
   delete style.method;
   delete style.reason;
   delete style.notify;
-  delete style.styleDigest;
   if (!style.name) {
     delete style.name;
   }
   let existed, codeIsUpdated;
+  if (reason == 'update' || reason == 'update-digest') {
+    return calcStyleDigest(style).then(digest => {
+      style.originalDigest = digest;
+      decide();
+    });
+  }
+  if (reason == 'import') {
+    style.originalDigest = style.originalDigest || style.styleDigest; // TODO: remove in the future
+    delete style.styleDigest; // TODO: remove in the future
+    if (typeof style.originalDigest != 'string' || style.originalDigest.length != 40) {
+      delete style.originalDigest;
+    }
+  }
+  return decide();
+
+  function decide() {
     if (id !== null) {
       // Update or create
       style.id = id;
       return dbExec('get', id).then((event, store) => {
         const oldStyle = event.target.result;
         existed = Boolean(oldStyle);
+        if (reason == 'update-digest' && oldStyle.originalDigest == style.originalDigest) {
+          return style;
+        }
         codeIsUpdated = !existed || style.sections && !styleSectionsEqual(style, oldStyle);
         style = Object.assign({}, oldStyle, style);
         return write(style, store);
@@ -264,6 +278,7 @@ function saveStyle(style) {
       }, style);
       return write(style);
     }
+  }
 
   function write(style, store) {
     style.sections = normalizeStyleSections(style);
@@ -277,6 +292,9 @@ function saveStyle(style) {
   }
 
   function done(event) {
+    if (reason == 'update-digest') {
+      return style;
+    }
     style.id = style.id || event.target.result;
     invalidateCache(existed ? {updated: style} : {added: style});
     compileStyleRegExps({style});
@@ -286,15 +304,6 @@ function saveStyle(style) {
         style, codeIsUpdated, reason,
       });
     }
-    if (reason == 'update') {
-      updateStyleDigest(style);
-    } else if (reason == 'import') {
-      if (typeof styleDigest == 'string' && styleDigest.length == 40) {
-        chromeLocal.setValue(DIGEST_KEY_PREFIX + style.id, styleDigest);
-      } else {
-        chrome.storage.local.remove(DIGEST_KEY_PREFIX + style.id);
-      }
-    }
     return style;
   }
 }
@@ -302,7 +311,7 @@ function saveStyle(style) {
 
 function deleteStyle({id, notify = true}) {
   id = Number(id);
-  chrome.storage.local.remove(DIGEST_KEY_PREFIX + id, ignoreChromeError);
+  chrome.storage.local.remove('originalDigest' + id, ignoreChromeError); // TODO: remove in the future
   return dbExec('delete', id).then(() => {
     invalidateCache({deletedId: id});
     if (notify) {
@@ -567,20 +576,6 @@ function normalizeStyleSections({sections}) {
 }
 
 
-function getStyleDigests(style) {
-  return Promise.all([
-    chromeLocal.getValue(DIGEST_KEY_PREFIX + style.id),
-    calcStyleDigest(style),
-  ]);
-}
-
-
-function updateStyleDigest(style) {
-  calcStyleDigest(style).then(digest =>
-    chromeLocal.setValue(DIGEST_KEY_PREFIX + style.id, digest));
-}
-
-
 function calcStyleDigest(style) {
   const jsonString = JSON.stringify(normalizeStyleSections(style));
   const text = new TextEncoder('utf-8').encode(jsonString);

update.js

@@ -1,5 +1,5 @@
 /* global getStyles, saveStyle, styleSectionsEqual, chromeLocal */
-/* global getStyleDigests, updateStyleDigest */
+/* global calcStyleDigest */
 'use strict';
 
 // eslint-disable-next-line no-var
@@ -39,7 +39,6 @@ var updater = {
   },
 
   checkStyle({style, observer = () => {}, save = true, ignoreDigest}) {
-    let hasDigest;
     /*
     Original style digests are calculated in these cases:
     * style is installed or updated from server
@@ -54,7 +53,7 @@ var updater = {
 
     'ignoreDigest' option is set on the second manual individual update check on the manage page.
     */
-    return getStyleDigests(style)
+    return (ignoreDigest ? Promise.resolve() : calcStyleDigest(style))
       .then(maybeFetchMd5)
       .then(maybeFetchCode)
       .then(maybeSave)
@@ -68,9 +67,8 @@ var updater = {
         updater.log(updater.SKIPPED + ` (${err}) #${style.id} ${style.name}`);
       });
 
-    function maybeFetchMd5([originalDigest, current]) {
+    function maybeFetchMd5(digest) {
-      hasDigest = Boolean(originalDigest);
+      if (!ignoreDigest && style.originalDigest && style.originalDigest != digest) {
-      if (hasDigest && !ignoreDigest && originalDigest != current) {
         return Promise.reject(updater.EDITED);
       }
       return download(style.md5Url);
@@ -80,7 +78,7 @@ var updater = {
       if (!md5 || md5.length != 32) {
         return Promise.reject(updater.ERROR_MD5);
       }
-      if (md5 == style.originalMd5 && hasDigest && !ignoreDigest) {
+      if (md5 == style.originalMd5 && style.originalDigest && !ignoreDigest) {
         return Promise.reject(updater.SAME_MD5);
       }
       return download(style.updateUrl);
@@ -95,9 +93,9 @@ var updater = {
       if (styleSectionsEqual(json, style)) {
         // JSONs may have different order of items even if sections are effectively equal
         // so we'll update the digest anyway
-        updateStyleDigest(json);
+        saveStyle(Object.assign(json, {reason: 'update-digest'}));
         return Promise.reject(updater.SAME_CODE);
-      } else if (!hasDigest && !ignoreDigest) {
+      } else if (!style.originalDigest && !ignoreDigest) {
         return Promise.reject(updater.MAYBE_EDITED);
       }
       return !save ? json :