From 01e987fd1cf0433cb7504a9eda544de74fcf0a7b Mon Sep 17 00:00:00 2001
From: filip mertens <filip.mertens@ethereum.org>
Date: Thu, 16 Jun 2022 14:48:02 +0200
Subject: [PATCH] parser start

---
 libs/remix-core-plugin/src/lib/code-parser.ts | 125 ++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 libs/remix-core-plugin/src/lib/code-parser.ts

diff --git a/libs/remix-core-plugin/src/lib/code-parser.ts b/libs/remix-core-plugin/src/lib/code-parser.ts
new file mode 100644
index 0000000000..09ac27f3b3
--- /dev/null
+++ b/libs/remix-core-plugin/src/lib/code-parser.ts
@@ -0,0 +1,125 @@
+'use strict'
+import { Plugin } from '@remixproject/engine'
+import { sourceMappingDecoder } from '@remix-project/remix-debug'
+import { CompilerAbstract } from '@remix-project/remix-solidity'
+import { Compiler } from '@remix-project/remix-solidity'
+
+
+import { CompilationError, CompilationResult, CompilationSource, helper } from '@remix-project/remix-solidity-ts'
+const SolidityParser = (window as any).SolidityParser = (window as any).SolidityParser || []
+
+const profile = {
+    name: 'codeParser',
+    methods: ['getBlockName', 'getLastNodeInLine', 'resolveImports', 'parseSolidity', 'getAST', 'nodesWithScope', 'nodesWithName', 'getNodes', 'compile', 'getNodeById', 'getLastCompilationResult', 'positionOfDefinition', 'definitionAtPosition', 'jumpToDefinition', 'referrencesAtPosition', 'nodesAtEditorPosition', 'referencesOf', 'getActiveHighlights', 'gasEstimation', 'declarationOf', 'jumpToPosition'],
+    events: [],
+    version: '0.0.1'
+}
+
+export class CodeParser extends Plugin {
+
+    currentFileAST: any // contains the simple parsed AST for the current file
+    compiler: any // used to compile the current file seperately from the main compiler
+    onAstFinished: (success: any, data: any, source: any, input: any, version: any) => Promise<void>
+    currentFile: any
+
+    constructor() {
+        super(profile)
+    }
+
+    async onActivation() {
+        this.on('editor', 'contentChanged', async () => {
+            console.log('contentChanged')
+            await this.getCurrentFileAST()
+            await this.compile()
+        })
+
+        this.on('fileManager', 'currentFileChanged', async () => {
+            await this.getCurrentFileAST()
+            await this.compile()
+        })
+
+        this.compiler = new Compiler((url, cb) => this.call('contentImport', 'resolveAndSave', url, undefined, false).then((result) => cb(null, result)).catch((error) => cb(error.message)))
+    }
+
+    // COMPILER
+
+    async compile() {
+        try {
+            const state = await this.call('solidity', 'getCompilerState')
+            this.compiler.set('optimize', state.optimize)
+            this.compiler.set('evmVersion', state.evmVersion)
+            this.compiler.set('language', state.language)
+            this.compiler.set('runs', state.runs)
+            this.compiler.set('useFileConfiguration', state.useFileConfiguration)
+            this.currentFile = await this.call('fileManager', 'file')
+            if (!this.currentFile) return
+            const content = await this.call('fileManager', 'readFile', this.currentFile)
+            const sources = { [this.currentFile]: { content } }
+            this.compiler.compile(sources, this.currentFile)
+        } catch (e) {
+            console.log(e)
+        }
+    }
+
+    /*
+    * simple parsing is used to quickly parse the current file or a text source without using the compiler or having to resolve imports
+    */
+
+    async parseSolidity(text: string) {
+        const ast = (SolidityParser as any).parse(text, { loc: true, range: true, tolerant: true })
+        console.log('AST PARSE SUCCESS', ast)
+        return ast
+    }
+
+    /**
+     * Tries to parse the current file or the given text and returns the AST
+     * If the parsing fails it returns the last successful AST for this file
+     * @param text 
+     * @returns 
+     */
+    async getCurrentFileAST(text: string = null) {
+        this.currentFile = await this.call('fileManager', 'file')
+        if (!this.currentFile) return
+        const fileContent = text || await this.call('fileManager', 'readFile', this.currentFile)
+        try {
+            const ast = await this.parseSolidity(fileContent)
+            this.currentFileAST = ast
+            console.log('AST PARSE SUCCESS', ast)
+        } catch (e) {
+            console.log(e)
+        }
+        console.log('LAST PARSER AST', this.currentFileAST)
+        return this.currentFileAST
+    }
+
+    /**
+    * Returns the block surrounding the given position
+    * For example if the position is in the middle of a function, it will return the function
+    * @param {position} position
+    * @param {string} text // optional
+    * @return {any}
+    * */
+    async getBlockAtPosition(position: any, text: string = null) {
+        await this.getCurrentFileAST(text)
+        const allowedTypes = ['SourceUnit', 'ContractDefinition', 'FunctionDefinition']
+
+        const walkAst = (node) => {
+            console.log(node)
+            if (node.loc.start.line <= position.lineNumber && node.loc.end.line >= position.lineNumber) {
+                const children = node.children || node.subNodes
+                if (children && allowedTypes.indexOf(node.type) !== -1) {
+                    for (const child of children) {
+                        const result = walkAst(child)
+                        if (result) return result
+                    }
+                }
+                return node
+            }
+            return null
+        }
+        if (!this.currentFileAST) return
+        return walkAst(this.currentFileAST)
+    }
+
+
+}
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