Lua: include script feature toolset

java_console/ui/src/main/java/com/rusefi/ui/lua/ContentSource.java

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+package com.rusefi.ui.lua;
+
+interface ContentSource {
+    String getContent(String name);
+}

java_console/ui/src/main/java/com/rusefi/ui/lua/LuaIncludeSyntax.java

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+package com.rusefi.ui.lua;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class LuaIncludeSyntax {
+    static String getScriptName(String lua) {
+        Pattern p = Pattern.compile(".*--\\s*scriptname\\s*([\\S]+)", Pattern.MULTILINE);
+        Matcher m = p.matcher(lua);
+        if (m.find())
+            return m.group(1);
+        return null;
+    }
+
+    static String reloadScript(String lua, ContentSource source) {
+
+        int index = 0;
+        Pattern startPattern = Pattern.compile(".*--\\s*include\\s*([\\S]+)", Pattern.MULTILINE);
+        Pattern endPattern = Pattern.compile(".*--\\s*endinclude", Pattern.MULTILINE);
+
+        StringBuilder result = new StringBuilder();
+
+        Matcher startMatcher = startPattern.matcher(lua);
+        Matcher endMatcher = endPattern.matcher(lua);
+        while (true) {
+            if (!startMatcher.find(index)) {
+                break;
+            }
+            int endOfIncludeStartIndex = startMatcher.end();
+
+            result.append(lua.substring(index, endOfIncludeStartIndex));
+            result.append("\n");
+
+            String includeName = startMatcher.group(1);
+            result.append(source.getContent(includeName));
+
+            if (!endMatcher.find(endOfIncludeStartIndex))
+                throw new IllegalStateException("No end for " + includeName);
+
+            index = endMatcher.end();
+
+
+        }
+
+        result.append(lua.substring(index));
+
+        return result.toString();
+
+
+    }
+}

java_console/ui/src/test/java/com/rusefi/ui/lua/LuaImportsTest.java

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+package com.rusefi.ui.lua;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class LuaImportsTest {
+    @Test
+    public void testScriptName() {
+        assertEquals(null, LuaIncludeSyntax.getScriptName(""));
+        assertEquals("X", LuaIncludeSyntax.getScriptName("-- scriptname X "));
+        assertEquals("X2", LuaIncludeSyntax.getScriptName("-- scriptname X2\n"));
+        assertEquals("X3", LuaIncludeSyntax.getScriptName("sdad\n  -- scriptname X3\n"));
+        assertEquals("folder/X3", LuaIncludeSyntax.getScriptName("sdad\n  -- scriptname folder/X3\n"));
+    }
+
+    @Test
+    public void testReloadTwoScripts() {
+
+        String lua = "before\n" +
+                "-- include functions.lua\n" +
+                "functionOldBody\n" +
+                "-- endinclude\n" +
+                "between\n" +
+                "--include      constants.lua    \n" +
+                "oldConstants\n" +
+                "-- endinclude\n" +
+                "after";
+
+        ContentSource source = name -> {
+            if (name.equals("functions.lua"))
+                return "newFunction";
+            if (name.equals("constants.lua"))
+                return "newConstant";
+            throw new IllegalStateException();
+        };
+
+        String newLua = LuaIncludeSyntax.reloadScript(lua, source);
+
+        assertEquals("before\n" +
+                "-- include functions.lua\n" +
+                "newFunction\n" +
+                "between\n" +
+                "--include      constants.lua\n" +
+                "newConstant\n" +
+                "after", newLua);
+
+
+    }
+
+}