Dynamic Operators

shared-operations/src/functions/index.ts

@@ -54,5 +54,3 @@ export class Operator {
         return output;
     }
 }
-
-// TODO: Export Operators?

shared-operations/src/workflow/getOperatorByName.ts

@@ -0,0 +1,26 @@
+import { Operator } from "../functions";
+
+// TODO: Import other Operators
+import { Impose } from "../functions/impose";
+export const Operators = {
+    Impose: Impose
+}
+
+// TODO: Convert this to a map or similar
+export function getOperatorByName(name: string): typeof Operator {
+    let foundClass: typeof Operator = null;
+
+    // Loop over each default export
+    Object.entries(Operators).some(([className, exportedClass]) => {
+        // Check if the exported item is a class
+        if (typeof exportedClass === 'function' && exportedClass.prototype) {
+            if (exportedClass.type === name) {
+                foundClass = exportedClass;
+                return true; // Stop the iteration
+            }
+        }
+        return false;
+    });
+    
+    return foundClass;
+}

shared-operations/src/workflow/traverseOperations.ts

@@ -2,19 +2,15 @@ import { organizeWaitOperations } from "./organizeWaitOperations";
 import { Action, WaitAction } from "../../declarations/Action";
 import { PdfFile } from "../wrappers/PdfFile";
 import { Progress } from "../functions";
-import { Impose } from "../functions/impose";
+import { validateOperations } from "./validateOperations";
+import { getOperatorByName } from "./getOperatorByName";
 
 export async function traverseOperations(operations: Action[], input: PdfFile[], progressCallback: (state: Progress) => void): Promise<PdfFile[]> {
-    // TODO: Validate using inbuilt validators: 
-    /*
-        validationResult = impose.validate()
-        if(validationResult.valid) {
-            // Check Next
-        }
-        else {
-            return validationResult.reason
-        }
-    */
+    
+    const validationResult = validateOperations(operations)
+    if(!validationResult.valid) {
+        throw Error(validationResult.reason);
+    }
     const waitOperations = organizeWaitOperations(operations);
 
     let results: PdfFile[] = [];
@@ -63,15 +59,13 @@ export async function traverseOperations(operations: Action[], input: PdfFile[],
                     const newPdf = await Operations.extractPages({file: input, pageIndexes: action.values["pageIndexes"]});
                     return newPdf;
                 });
-                break;*/
+                break;
             case "impose":
                 let impose = new Impose(action);
-                input = await impose.run(input, (state: Progress) => {
-                    progressCallback(state);
-                });
+                input = await impose.run(input, progressCallback);
                 await nextOperation(action.actions, input, progressCallback);
                 break;
-            /*case "merge":
+            case "merge":
                 yield* nToOne(input, action, async (inputs) => {
                     const newPdf = await Operations.mergePDFs({files: inputs});
                     return newPdf;
@@ -121,7 +115,14 @@ export async function traverseOperations(operations: Action[], input: PdfFile[],
                 });
                 break;*/
             default:
-                throw new Error(`${action.type} not implemented yet.`);
+                const operator = getOperatorByName(action.type);
+                if(operator) {
+                    let opteration = new operator(action);
+                    input = await opteration.run(input, progressCallback);
+                    await nextOperation(action.actions, input, progressCallback);
+                }
+                else
+                    throw new Error(`${action.type} not implemented yet.`);
         }
     }
 }

shared-operations/src/workflow/validateOperations.ts

@@ -0,0 +1,16 @@
+import { Action } from "../../declarations/Action";
+
+export function validateOperations(actions: Action[]): { valid: boolean, reason?: string} {
+    // TODO: Validate using inbuilt validators: 
+    /*
+        validationResult = impose.validate()
+        if(validationResult.valid) {
+            // Check Next
+        }
+        else {
+            return validationResult.reason
+        }
+    */
+
+    return { valid: true };
+}