Работа над opds

server/core/opds/BasePage.js

@@ -1,6 +1,14 @@
+const he = require('he');
+
 const WebWorker = require('../WebWorker');//singleton
 const XmlParser = require('../xml/XmlParser');
 
+const spaceChar = String.fromCodePoint(0x00B7);
+const ruAlphabet = 'абвгдеёжзийклмнопрстуфхцчшщъыьэюя';
+const enAlphabet = 'abcdefghijklmnopqrstuvwxyz';
+const enruArr = (ruAlphabet + enAlphabet).split('');
+const enru = new Set(enruArr);
+
 class BasePage {
     constructor(config) {        
         this.config = config;
@@ -16,6 +24,8 @@ class BasePage {
         if (!entry.title)
             throw new Error('makeEntry: no title');
 
+        entry.title = he.escape(entry.title);
+
         const result = {
             updated: (new Date()).toISOString().substring(0, 19) + 'Z',
         };
@@ -73,6 +83,62 @@ class BasePage {
     async body() {
         throw new Error('Body not implemented');
     }
+
+    // -- stuff -------------------------------------------
+    async search(from, query) {
+        const result = [];
+        const queryRes = await this.webWorker.search(from, query);
+
+        for (const row of queryRes.found) {
+            const rec = {
+                id: row.id,
+                title: '=' + (row[from] || 'Без имени'),
+                q: `=${encodeURIComponent(row[from])}`,
+            };
+
+            result.push(rec);
+        }
+
+        return result;
+    }
+
+    async opdsQuery(from, query) {
+        const result = [];
+
+        const queryRes = await this.webWorker.opdsQuery(from, query);
+        let count = 0;
+        for (const row of queryRes.found)
+            count += row.count;
+
+        if (count <= query.limit)
+            return await this.search(from, query);
+
+        const names = new Set();
+        const others = [];
+        for (const row of queryRes.found) {
+            const name = row.name.toUpperCase();
+
+            if (!names.has(name)) {
+                const rec = {
+                    id: row.id,
+                    title: name.replace(/ /g, spaceChar),
+                    q: encodeURIComponent(row.name.toLowerCase()),
+                    count: row.count,
+                };
+                if (query.depth > 1 || enru.has(row.name[0].toLowerCase())) {
+                    result.push(rec);
+                } else {
+                    others.push(rec);
+                }
+                names.add(name);
+            }
+        }
+
+        if (!query.others && query.depth == 1)
+            result.push({id: 'other', title: 'Все остальные', q: '___others'});
+
+        return (!query.others ? result : others);
+    }
 }
 
 module.exports = BasePage;