1 files changed, 132 insertions, 0 deletions
diff --git a/src/client/util/Scripting.ts b/src/client/util/Scripting.ts
new file mode 100644
index 000000000..46bd1a206
--- /dev/null
+++ b/src/client/util/Scripting.ts
@@ -0,0 +1,132 @@
+// import * as ts from "typescript"
+let ts = (window as any).ts;
+import { Opt, Field } from "../../fields/Field";
+import { Document } from "../../fields/Document";
+import { NumberField } from "../../fields/NumberField";
+import { ImageField } from "../../fields/ImageField";
+import { TextField } from "../../fields/TextField";
+import { RichTextField } from "../../fields/RichTextField";
+import { KeyStore } from "../../fields/KeyStore";
+import { ListField } from "../../fields/ListField";
+// // @ts-ignore
+// import * as typescriptlib from '!!raw-loader!../../../node_modules/typescript/lib/lib.d.ts'
+// // @ts-ignore
+// import * as typescriptes5 from '!!raw-loader!../../../node_modules/typescript/lib/lib.es5.d.ts'
+
+// @ts-ignore
+import * as typescriptlib from '!!raw-loader!./type_decls.d'
+
+
+export interface ExecutableScript {
+    (): any;
+
+    compiled: boolean;
+}
+
+function Compile(script: string | undefined, diagnostics: Opt<any[]>, scope: { [name: string]: any }): ExecutableScript {
+    const compiled = !(diagnostics && diagnostics.some(diag => diag.category == ts.DiagnosticCategory.Error));
+
+    let func: () => Opt<Field>;
+    if (compiled && script) {
+        let fieldTypes = [Document, NumberField, TextField, ImageField, RichTextField, ListField];
+        let paramNames = ["KeyStore", ...fieldTypes.map(fn => fn.name)];
+        let params: any[] = [KeyStore, ...fieldTypes]
+        for (let prop in scope) {
+            if (prop === "this") {
+                continue;
+            }
+            paramNames.push(prop);
+            params.push(scope[prop]);
+        }
+        let thisParam = scope["this"];
+        let compiledFunction = new Function(...paramNames, script);
+        func = function (): Opt<Field> {
+            return compiledFunction.apply(thisParam, params)
+        };
+    } else {
+        func = () => undefined;
+    }
+
+    return Object.assign(func,
+        {
+            compiled
+        });
+}
+
+interface File {
+    fileName: string;
+    content: string;
+}
+
+// class ScriptingCompilerHost implements ts.CompilerHost {
+class ScriptingCompilerHost {
+    files: File[] = [];
+
+    // getSourceFile(fileName: string, languageVersion: ts.ScriptTarget, onError?: ((message: string) => void) | undefined, shouldCreateNewSourceFile?: boolean | undefined): ts.SourceFile | undefined {
+    getSourceFile(fileName: string, languageVersion: any, onError?: ((message: string) => void) | undefined, shouldCreateNewSourceFile?: boolean | undefined): any | undefined {
+        let contents = this.readFile(fileName);
+        if (contents !== undefined) {
+            return ts.createSourceFile(fileName, contents, languageVersion, true);
+        }
+        return undefined;
+    }
+    // getDefaultLibFileName(options: ts.CompilerOptions): string {
+    getDefaultLibFileName(options: any): string {
+        return 'node_modules/typescript/lib/lib.d.ts' // No idea what this means...
+    }
+    writeFile(fileName: string, content: string) {
+        const file = this.files.find(file => file.fileName === fileName);
+        if (file) {
+            file.content = content;
+        } else {
+            this.files.push({ fileName, content })
+        }
+    }
+    getCurrentDirectory(): string {
+        return '';
+    }
+    getCanonicalFileName(fileName: string): string {
+        return this.useCaseSensitiveFileNames() ? fileName : fileName.toLowerCase();
+    }
+    useCaseSensitiveFileNames(): boolean {
+        return true;
+    }
+    getNewLine(): string {
+        return '\n';
+    }
+    fileExists(fileName: string): boolean {
+        return this.files.some(file => file.fileName === fileName);
+    }
+    readFile(fileName: string): string | undefined {
+        let file = this.files.find(file => file.fileName === fileName);
+        if (file) {
+            return file.content;
+        }
+        return undefined;
+    }
+}
+
+export function CompileScript(script: string, scope?: { [name: string]: any }, addReturn: boolean = false): ExecutableScript {
+    let host = new ScriptingCompilerHost;
+    let funcScript = `(function() {
+        ${addReturn ? `return ${script};` : script}
+    })()`
+    host.writeFile("file.ts", funcScript);
+    host.writeFile('node_modules/typescript/lib/lib.d.ts', typescriptlib);
+    let program = ts.createProgram(["file.ts"], {}, host);
+    let testResult = program.emit();
+    let outputText = "return " + host.readFile("file.js");
+
+    let diagnostics = ts.getPreEmitDiagnostics(program).concat(testResult.diagnostics);
+
+    return Compile(outputText, diagnostics, scope || {});
+}
+
+export function ToField(data: any): Opt<Field> {
+    if (typeof data == "string") {
+        return new TextField(data);
+    } else if (typeof data == "number") {
+        return new NumberField(data);
+    }
+    return undefined;
+}
+\ No newline at end of file