fix displaying range of length 1

dist/twitter.js

@@ -385,20 +385,18 @@ ${Object.keys(cachedFeed.stories).some(id => id > topOfFeed) ? `\n下次推送
                 return this.client.feed.reelsMedia({ userIds: [userId] }).items()
                     .then(storyItems => Promise.all(storyItems
                     .filter(item => !(item.pk in this.cache[userName].stories))
-                    .map(item => this.webshot([Object.assign(Object.assign({}, item), { user: this.cache[userName].user })], (msgs, text, author) => this.cache[userName].stories[item.pk] = { pk: item.pk, msgs, text, author, original: item }, this.webshotDelay))).then(() => userName)
-                    .finally(() => {
-                    this.cache[userName].updated = new Date();
-                    if (storyItems.length === 0)
-                        this.bot.sendTo(receiver, `当前用户 (@${userName}) 没有可用的 Instagram 限时动态。`);
-                }));
+                    .map(item => this.webshot([Object.assign(Object.assign({}, item), { user: this.cache[userName].user })], (msgs, text, author) => this.cache[userName].stories[item.pk] = { pk: item.pk, msgs, text, author, original: item }, this.webshotDelay))).then(() => userName).finally(() => this.cache[userName].updated = new Date()));
             })
                 .then(userName => {
                 const storyItems = Object.values(this.cache[userName].stories)
                     .sort((i1, i2) => -utils_1.BigNumOps.compare(i2.pk, i1.pk));
+                if (storyItems.length === 0)
+                    return this.bot.sendTo(receiver, `当前用户 (@${userName}) 没有可用的 Instagram 限时动态。`);
                 if (startIndex + 1 > storyItems.length)
                     return this.bot.sendTo(receiver, '跳过数量到达或超过当前用户可用的限时动态数量。');
-                const sendRangeText = `${startIndex + 1}${count > 1 ? `-${Math.min(storyItems.length, startIndex + count)}` : ''}`;
-                return this.workOnMedia(storyItems.slice(startIndex, startIndex + count), sender)
+                const endIndex = Math.min(storyItems.length, startIndex + count);
+                const sendRangeText = `${startIndex + 1}${endIndex - startIndex > 1 ? `-${endIndex}` : ''}`;
+                return this.workOnMedia(storyItems.slice(startIndex, endIndex), sender)
                     .then(() => this.bot.sendTo(receiver, `已显示当前用户 ${storyItems.length} 条可用限时动态中的第 ${sendRangeText} 条。`));
             })
                 .catch((error) => {

src/twitter.ts

@@ -263,19 +263,16 @@ export default class {
                   this.cache[userName].stories[item.pk] = {pk: item.pk, msgs, text, author, original: item},
                 this.webshotDelay
               ))
-            ).then(() => userName)
-              .finally(() => {
-                this.cache[userName].updated = new Date();
-                if (storyItems.length === 0) this.bot.sendTo(receiver, `当前用户 (@${userName}) 没有可用的 Instagram 限时动态。`);
-              })
-            );
+            ).then(() => userName).finally(() => this.cache[userName].updated = new Date()));
         })
         .then(userName => {
           const storyItems = Object.values(this.cache[userName].stories)
             .sort((i1, i2) => -BigNumOps.compare(i2.pk, i1.pk)); // ascending!
+          if (storyItems.length === 0) return this.bot.sendTo(receiver, `当前用户 (@${userName}) 没有可用的 Instagram 限时动态。`);
           if (startIndex + 1 > storyItems.length) return this.bot.sendTo(receiver, '跳过数量到达或超过当前用户可用的限时动态数量。');
-          const sendRangeText = `${startIndex + 1}${count > 1 ? `-${Math.min(storyItems.length, startIndex + count)}` : ''}`;
-          return this.workOnMedia(storyItems.slice(startIndex, startIndex + count), sender)
+          const endIndex = Math.min(storyItems.length, startIndex + count);
+          const sendRangeText = `${startIndex + 1}${endIndex - startIndex > 1 ? `-${endIndex}` : ''}`;
+          return this.workOnMedia(storyItems.slice(startIndex, endIndex), sender)
             .then(() => this.bot.sendTo(receiver, `已显示当前用户 ${storyItems.length} 条可用限时动态中的第 ${sendRangeText} 条。`));
         })
         .catch((error: IgClientError & Partial<RequestError>) => {