Работа над модулем xmlParser

server/core/Reader/BookConverter/xmlParser.js

@@ -0,0 +1,120 @@
+const sax = require('../../sax');
+
+function formatXml(parsedXml, textFilterFunc) {
+    let out = '<?xml version="1.0" encoding="utf-8"?>';
+    out += formatXmlNode(parsedXml, textFilterFunc);
+    return out;
+}
+
+function formatXmlNode(node, textFilterFunc) {
+    textFilterFunc = (textFilterFunc ? textFilterFunc : text => text);
+
+    const formatXmlNodeImpl = (node, name) => {
+        let out = '';
+
+        if (Array.isArray(node)) {
+            for (const n of node) {
+                out += formatXmlNode(n);
+            }
+        } else if (typeof node == 'string') {
+            if (name)
+                out += `<${name}>${textFilterFunc(node)}</${name}>`;
+            else
+                out += textFilterFunc(node);
+        } else {
+            if (node._n)
+                name = node._n;
+
+            let attrs = '';
+            if (node._attrs) {
+                for (let attrName in node._attrs) {
+                    attrs += ` ${attrName}="${node._attrs[attrName]}"`;
+                }
+            }
+
+            let tOpen = '';
+            let tBody = '';
+            let tClose = '';
+            if (name)
+                tOpen += `<${name}${attrs}>`;
+            if (node.hasOwnProperty('_t'))
+                tBody += textFilterFunc(node._t);
+
+            for (let nodeName in node) {
+                if (nodeName && nodeName[0] == '_' && nodeName != '_a')
+                    continue;
+
+                const n = node[nodeName];
+                tBody += formatXmlNodeImpl(n, nodeName);
+            }
+            
+            if (name)
+                tClose += `</${name}>`;
+
+            out += `${tOpen}${tBody}${tClose}`;
+        }
+        return out;
+    }
+
+    return formatXmlNodeImpl(node);
+}
+
+function parseXml(xmlString, lowerCase = true) {
+    let result = {};
+    let node = result;
+
+    const onTextNode = (text, cutCounter, cutTag) => {// eslint-disable-line no-unused-vars
+        node._t = text;
+    };
+
+    const onStartNode = (tag, tail, singleTag, cutCounter, cutTag) => {// eslint-disable-line no-unused-vars
+        const newNode = {_n: tag, _p: node};
+
+        if (tail) {
+            const parsedAttrs = sax.getAttrsSync(tail, lowerCase);
+            const atKeys = Object.keys(parsedAttrs);
+            if (atKeys.length) {
+                const attrs = {};
+                for (let i = 0; i < atKeys.length; i++) {
+                    const attrName = atKeys[i];
+                    attrs[parsedAttrs[attrName].fullname] = parsedAttrs[attrName].value;
+                }
+
+                newNode._attrs = attrs;
+            }
+        }
+
+        if (!node._a)
+            node._a = [];
+        node._a.push(newNode);
+        node = newNode;
+    };
+
+    const onEndNode = (tag, tail, singleTag, cutCounter, cutTag) => {// eslint-disable-line no-unused-vars
+        if (node._p && node._n == tag)
+            node = node._p;
+    };
+
+    sax.parseSync(xmlString, {
+        onStartNode, onEndNode, onTextNode, lowerCase
+    });
+
+    if (result._a)
+        result = result._a[0];
+    
+    return result;
+}
+
+function simplifyXml(parsedXml) {
+}
+
+function desimplifyXml(parsedXml) {
+}
+
+module.exports = {
+    formatXml,
+    formatXmlNode,
+    parseXml,
+    simplifyXml,
+    desimplifyXml
+}

server/core/sax.js

@@ -6,7 +6,8 @@ function parseSync(xstr, options) {
         onCdata: _onCdata = dummy,
         onComment: _onComment = dummy,
         onProgress: _onProgress = dummy,
-        innerCut = new Set()
+        innerCut = new Set(),
+        lowerCase = true,
     } = options;
 
     let i = 0;
@@ -91,7 +92,8 @@ function parseSync(xstr, options) {
             } else {
                 tag = tagData;
             }
-            tag = tag.toLowerCase();
+            if (lowerCase)
+                tag = tag.toLowerCase();
 
             if (innerCut.has(tag) && (!cutCounter || cutTag === tag)) {
                 if (!cutCounter)
@@ -146,7 +148,8 @@ async function parse(xstr, options) {
         onCdata: _onCdata = dummy,
         onComment: _onComment = dummy,
         onProgress: _onProgress = dummy,
-        innerCut = new Set()
+        innerCut = new Set(),
+        lowerCase = true,
     } = options;
 
     let i = 0;
@@ -231,7 +234,8 @@ async function parse(xstr, options) {
             } else {
                 tag = tagData;
             }
-            tag = tag.toLowerCase();
+            if (lowerCase)
+                tag = tag.toLowerCase();
 
             if (innerCut.has(tag) && (!cutCounter || cutTag === tag)) {
                 if (!cutCounter)
@@ -276,7 +280,7 @@ async function parse(xstr, options) {
     await _onProgress(100);
 }
 
-function getAttrsSync(tail) {
+function getAttrsSync(tail, lowerCase = true) {
     let result = {};
     let name = '';    
     let value = '';
@@ -287,14 +291,16 @@ function getAttrsSync(tail) {
     let waitEq = false;
 
     const pushResult = () => {
-        name = name.toLowerCase();
+        if (lowerCase)
+            name = name.toLowerCase();
         if (name != '') {
+            const fullname = name;
             let ns = '';
-            if (name.indexOf(':') >= 0) {
-                [ns, name] = name.split(':');
+            if (fullname.indexOf(':') >= 0) {
+                [ns, name] = fullname.split(':');
             }
 
-            result[name] = {value, ns};
+            result[name] = {value, ns, fullname};
         }
         name = '';
         value = '';