001/**
002 * Copyright (c) 2025-2026, Michael Yang 杨福海 (fuhai999@gmail.com).
003 * <p>
004 * Licensed under the GNU Lesser General Public License (LGPL) ,Version 3.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 * <p>
008 * http://www.gnu.org/licenses/lgpl-3.0.txt
009 * <p>
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package dev.tinyflow.core.parser;
017
018import com.agentsflex.core.chain.Chain;
019import com.agentsflex.core.chain.ChainEdge;
020import com.agentsflex.core.chain.ChainNode;
021import com.agentsflex.core.chain.JsCodeCondition;
022import com.agentsflex.core.util.CollectionUtil;
023import com.agentsflex.core.util.StringUtil;
024import com.alibaba.fastjson.JSON;
025import com.alibaba.fastjson.JSONArray;
026import com.alibaba.fastjson.JSONObject;
027import dev.tinyflow.core.Tinyflow;
028import dev.tinyflow.core.parser.impl.*;
029
030import java.util.HashMap;
031import java.util.Map;
032
033public class ChainParser {
034
035    private Map<String, NodeParser> nodeParserMap = new HashMap<>();
036
037    public ChainParser() {
038
039        initDefaultParsers();
040    }
041
042    private void initDefaultParsers() {
043        nodeParserMap.put("startNode", new StartNodeParser());
044        nodeParserMap.put("codeNode", new CodeNodeParser());
045        nodeParserMap.put("confirmNode", new ConfirmNodeParser());
046
047        nodeParserMap.put("httpNode", new HttpNodeParser());
048        nodeParserMap.put("knowledgeNode", new KnowledgeNodeParser());
049        nodeParserMap.put("loopNode", new LoopNodeParser());
050        nodeParserMap.put("searchEngineNode", new SearchEngineNodeParser());
051        nodeParserMap.put("templateNode", new TemplateNodeParser());
052
053        nodeParserMap.put("endNode", new EndNodeParser());
054        nodeParserMap.put("llmNode", new LlmNodeParser());
055    }
056
057    public Map<String, NodeParser> getNodeParserMap() {
058        return nodeParserMap;
059    }
060
061    public void setNodeParserMap(Map<String, NodeParser> nodeParserMap) {
062        this.nodeParserMap = nodeParserMap;
063    }
064
065    public void addNodeParser(String type, NodeParser nodeParser) {
066        this.nodeParserMap.put(type, nodeParser);
067    }
068
069    public Chain parse(Tinyflow tinyflow) {
070        String jsonString = tinyflow.getData();
071        if (StringUtil.noText(jsonString)) {
072            return null;
073        }
074
075        JSONObject root = JSON.parseObject(jsonString);
076        JSONArray nodes = root.getJSONArray("nodes");
077        JSONArray edges = root.getJSONArray("edges");
078
079        return parse(tinyflow, nodes, edges, null);
080    }
081
082    public Chain parse(Tinyflow tinyflow, JSONArray nodes, JSONArray edges, JSONObject parentNode) {
083        if (CollectionUtil.noItems(nodes) || CollectionUtil.noItems(edges)) {
084            return null;
085        }
086
087        Chain chain = new Chain();
088        for (int i = 0; i < nodes.size(); i++) {
089            JSONObject nodeObject = nodes.getJSONObject(i);
090            if ((parentNode == null && StringUtil.noText(nodeObject.getString("parentId")))
091                    || (parentNode != null && parentNode.getString("id").equals(nodeObject.getString("parentId")))) {
092                ChainNode node = parseNode(tinyflow, nodeObject);
093                if (node != null) {
094                    chain.addNode(node);
095                }
096            }
097        }
098
099        for (int i = 0; i < edges.size(); i++) {
100//            JSONObject edgeObject = edges.getJSONObject(i);
101//            JSONObject edgeData = edgeObject.getJSONObject("data");
102//            if ((parentNode == null && (edgeData == null || StringUtil.noText(edgeData.getString("parentNodeId"))))
103//                    || (parentNode != null && edgeData != null && edgeData.getString("parentNodeId").equals(parentNode.getString("id"))
104//                    //不添加子流程里的第一条 edge（也就是父节点连接子节点的第一条线）
105//                    && !parentNode.getString("id").equals(edgeObject.getString("source")))) {
106//                ChainEdge edge = parseEdge(edgeObject);
107//                if (edge != null) {
108//                    chain.addEdge(edge);
109//                }
110//            }
111
112            JSONObject edgeObject = edges.getJSONObject(i);
113            ChainEdge edge = parseEdge(edgeObject);
114            if (edge == null) {
115                continue;
116            }
117            if (parentNode == null ||
118                    //不添加子流程里的第一条 edge（也就是父节点连接子节点的第一条线）
119                    (!parentNode.getString("id").equals(edgeObject.getString("source")))
120            ) {
121                chain.addEdge(edge);
122            }
123        }
124
125        return chain;
126    }
127
128    private ChainNode parseNode(Tinyflow tinyflow, JSONObject nodeObject) {
129        String type = nodeObject.getString("type");
130        if (StringUtil.noText(type)) {
131            return null;
132        }
133
134        NodeParser nodeParser = nodeParserMap.get(type);
135        return nodeParser == null ? null : nodeParser.parse(nodeObject, tinyflow);
136    }
137
138
139    private ChainEdge parseEdge(JSONObject edgeObject) {
140        if (edgeObject == null) return null;
141        ChainEdge edge = new ChainEdge();
142        edge.setId(edgeObject.getString("id"));
143        edge.setSource(edgeObject.getString("source"));
144        edge.setTarget(edgeObject.getString("target"));
145
146        JSONObject data = edgeObject.getJSONObject("data");
147        if (data == null || data.isEmpty()) {
148            return edge;
149        }
150
151        String conditionString = data.getString("condition");
152        if (StringUtil.hasText(conditionString)) {
153            edge.setCondition(new JsCodeCondition(conditionString.trim()));
154        }
155        return edge;
156    }
157}