base64 support, ApiJson, Eval string inputs

src/nodes/ApiJson.ts

@@ -0,0 +1,145 @@
+import {
+  NumberVar,
+  StringVar,
+  BooleanVar,
+} from './io/AbstractIOSet';
+import Node from './Node';
+import _ from 'lodash';
+
+const inputs = {
+  propertyPath0: {
+    type: 'String',
+  } as StringVar,
+  propertyPath1: {
+    type: 'String',
+  } as StringVar,
+  propertyPath2: {
+    type: 'String',
+  } as StringVar,
+  propertyPath3: {
+    type: 'String',
+  } as StringVar,
+  propertyPath4: {
+    type: 'String',
+  } as StringVar,
+  propertyPath5: {
+    type: 'String',
+  } as StringVar,
+  propertyPath6: {
+    type: 'String',
+  } as StringVar,
+  propertyPath7: {
+    type: 'String',
+  } as StringVar,
+  url: {
+    type: 'String',
+  } as StringVar,
+  payload: {
+    type: 'String',
+  } as StringVar,
+  method: {
+    type: 'String',
+    default: 'GET',
+    enum: ['GET', 'POST', 'PUT', 'DELETE'],
+  } as StringVar,
+  throttleMs: {
+    type: 'Number',
+    default: 10000,
+  } as NumberVar,
+  compress: {
+    type: 'Boolean',
+    default: false,
+  } as BooleanVar,
+  quality: {
+    type: 'Number',
+    default: 95,
+    min: 0,
+    max: 100,
+  } as NumberVar,
+};
+
+const outputs = {
+  value0: {
+    type: 'String',
+  } as StringVar,
+  value1: {
+    type: 'String',
+  } as StringVar,
+  value2: {
+    type: 'String',
+  } as StringVar,
+  value3: {
+    type: 'String',
+  } as StringVar,
+  value4: {
+    type: 'String',
+  } as StringVar,
+  value5: {
+    type: 'String',
+  } as StringVar,
+  value6: {
+    type: 'String',
+  } as StringVar,
+  value7: {
+    type: 'String',
+  } as StringVar,
+};
+
+export default class ApiJson extends Node<typeof inputs, typeof outputs> {
+    private fetchDataThrottled;
+    private throttleWaitMs;
+
+    constructor(options = {}) {
+      super('ApiJson', inputs, outputs);
+      this.throttleWaitMs = this.in.throttleMs.value;
+      this.fetchDataThrottled = _.throttle(this.fetchData, this.throttleWaitMs);
+    }
+
+    async _update() {
+      const url = this.in.url.value;
+
+
+      if (!url) {
+        return;
+      }
+
+      if (this.throttleWaitMs !== this.in.throttleMs.value) {
+        this.throttleWaitMs = this.in.throttleMs.value;
+        this.fetchDataThrottled = _.throttle(this.fetchData, this.throttleWaitMs);
+      }
+
+      let data: object;
+      try {
+        data = await this.fetchDataThrottled();
+      } catch (e) {
+        console.error(e);
+        await new Promise((resolve) => setTimeout(resolve, this.throttleWaitMs));
+        return;
+      }
+
+      this.out.value0.value = _.get(data, this.in.propertyPath0.value);
+      this.out.value1.value = _.get(data, this.in.propertyPath1.value);
+      this.out.value2.value = _.get(data, this.in.propertyPath2.value);
+      this.out.value3.value = _.get(data, this.in.propertyPath3.value);
+      this.out.value4.value = _.get(data, this.in.propertyPath4.value);
+      this.out.value5.value = _.get(data, this.in.propertyPath5.value);
+      this.out.value6.value = _.get(data, this.in.propertyPath6.value);
+      this.out.value7.value = _.get(data, this.in.propertyPath7.value);
+    }
+
+    async fetchData() {
+      const response = await fetch(this.in.url.value, {
+        method: this.in.method.value,
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        ...(this.in.payload.value ? {body: this.in.payload.value} : {}),
+      });
+
+      if (response.status >= 400) {
+        throw new Error(response.statusText);
+      }
+
+      return await response.json();
+    }
+}

src/nodes/Base64ToImg.ts

@@ -0,0 +1,84 @@
+import {
+  ImageVar,
+  NumberVar,
+  StringVar,
+} from './io/AbstractIOSet';
+import Node from './Node';
+import {canvasPool2D} from '../canvas/CanvasPool';
+
+const inputs = {
+  base64: {
+    type: 'String',
+  } as StringVar,
+};
+
+const outputs = {
+  image: {
+    type: 'Image',
+  } as ImageVar,
+  width: {
+    type: 'Number',
+  } as NumberVar,
+  height: {
+    type: 'Number',
+  } as NumberVar,
+};
+
+/**
+ * TODO: after successful tests move this to the library
+ */
+export default class Base64ToImg extends Node<typeof inputs, typeof outputs> {
+  constructor(options = {}) {
+    super('Base64ToImg', inputs, outputs);
+  }
+
+  async _update() {
+    let base64String = this.in.base64.value;
+
+    if (!base64String) {
+      return;
+    }
+
+    if (!base64String.startsWith('data:image/')) {
+      base64String = `data:${this.estimateImageMimeType(base64String)};base64,${base64String}`;
+    }
+
+    const canvas = canvasPool2D.createCanvas();
+    canvas.acquire();
+
+    await new Promise((resolve, reject) => {
+      const img = new Image();
+      img.onload = () => {
+        canvas.width = img.width;
+        canvas.height = img.height;
+        const canvasContext = canvas.getContext('2d');
+        canvasContext.drawImage(img, 0, 0);
+        resolve(img);
+      };
+
+      img.onerror = (e) => {
+        reject(new Error(e as string));
+      };
+
+      img.src = base64String;
+    });
+
+    this.out.image.value = canvas;
+    this.out.width.value = canvas.width;
+    this.out.height.value = canvas.height;
+  }
+
+  private estimateImageMimeType(base64String: string): string {
+    // Attempt to estimate the MIME type based on base64 signature.
+    if (base64String.startsWith('iVBORw0KGgo=')) {
+      return 'image/png';
+    } else if (base64String.startsWith('/9j/')) {
+      return 'image/jpeg';
+    } else if (base64String.startsWith('UklGR')) {
+      return 'image/webp';
+    } else {
+      // Default or unknown type
+      return 'application/octet-stream';
+    }
+  }
+}

src/nodes/Eval.ts

@@ -5,11 +5,11 @@ import {
     StringVar,
     BooleanVar,
 } from './io/AbstractIOSet';
-import get from 'lodash/get';
+import _ from 'lodash';
 
 const inputs = {
     image: {
-        type: 'Image'
+        type: 'Image',
     } as ImageVar,
     i0: {
         type: 'Number',
@@ -43,6 +43,38 @@ const inputs = {
         type: 'Number',
         default: 0,
     } as NumberVar,
+    i8: {
+        type: 'String',
+        default: undefined,
+    } as StringVar,
+    i9: {
+        type: 'String',
+        default: undefined,
+    } as StringVar,
+    i10: {
+        type: 'String',
+        default: undefined,
+    } as StringVar,
+    i11: {
+        type: 'String',
+        default: undefined,
+    } as StringVar,
+    i12: {
+        type: 'String',
+        default: undefined,
+    } as StringVar,
+    i13: {
+        type: 'String',
+        default: undefined,
+    } as StringVar,
+    i14: {
+        type: 'String',
+        default: undefined,
+    } as StringVar,
+    i15: {
+        type: 'String',
+        default: undefined,
+    } as StringVar,
     formula: {
         type: 'String',
         default: '',
@@ -50,41 +82,52 @@ const inputs = {
     waitForInput: {
         type: 'Boolean',
         default: true,
-    } as BooleanVar
+    } as BooleanVar,
 };
 
 const outputs = {
     image: {
-        type: 'Image'
+        type: 'Image',
     } as ImageVar,
     result: {
-        type: 'Number'
+        type: 'Number',
     } as NumberVar,
-}
+    resultString: {
+        type: 'String',
+    } as StringVar,
+};
 
 export default class Eval extends Node<typeof inputs, typeof outputs> {
     constructor() {
         super('Eval', inputs, outputs);
     }
 
-    interpolate() {
-        return this.in.formula.value.replace(/\{(\w+)\}/g, (_, paramName) =>
-            get(this.in, [paramName, 'value'], 0)
-        )
+    interpolate(defaultValue: any) {
+        return this.in.formula.value.replace(/\{((i\d)+)}/g, (originalString, paramName) => {
+            return _.get(this.in, [paramName, 'value'], defaultValue);
+        });
     }
 
     hasAllConnectedInputsValue() {
-        if (this.in.waitForInput.value) {
-            return super.hasAllConnectedInputsValue();
+        if (!this.in.waitForInput.value) {
+            return true;
+        }
+
+        for (const inputName of Object.keys(this.in.variables)) {
+            // allow empty string
+            if (this.in[inputName].output && !this.in[inputName].value && !_.isString(this.in[inputName].value)) {
+                return false;
+            }
         }
         return true;
     }
 
     evaluate() {
         try {
-            this.out.result.value = eval(this.interpolate());
+            this.out.result.value = eval(this.interpolate(0));
+            this.out.resultString.value = eval(this.interpolate(''));
         } catch (e) {
-            console.error(e);
+            console.error(e, this.in);
         }
         this.out.image.value = this.in.image.value;
     }

src/nodes/ImgToBase64.ts

@@ -0,0 +1,62 @@
+import {
+  ImageVar,
+  StringVar,
+} from './io/AbstractIOSet';
+import Node from './Node';
+import {canvasPool2D} from '../canvas/CanvasPool';
+import {waitForMedia} from '../utils';
+import {mediaSize} from './canvas';
+
+const inputs = {
+  image: {
+    type: 'Image',
+  } as ImageVar,
+  type: {
+    type: 'String',
+    enum: ['image/png', 'image/jpeg', 'image/webp', 'image/gif'],
+    default: 'image/png',
+  } as StringVar,
+};
+
+const outputs = {
+  base64: {
+    type: 'String',
+  } as StringVar,
+};
+
+export default class ImgToBase64 extends Node<typeof inputs, typeof outputs> {
+  constructor(options = {}) {
+    super('ImgToBase64', inputs, outputs);
+  }
+
+  async _update() {
+    const media = this.in.image.value;
+
+    if (!media) {
+      return;
+    }
+    await waitForMedia(media);
+    const {width, height} = mediaSize(media);
+
+    const canvas = canvasPool2D.createCanvas();
+    canvas.acquire();
+    canvas.width = width;
+    canvas.height = height;
+
+    // @ts-ignore
+    canvas.getContext('2d').drawImage(media, 0, 0, width, height);
+
+    const blob = await canvas.convertToBlob({type: this.in.type.value});
+
+    this.out.base64.value = await new Promise((resolve, reject) => {
+      const reader = new FileReader();
+      reader.onloadend = () => {
+        resolve(reader.result as string);
+      };
+      reader.onerror = (e) => {
+        reject(e);
+      };
+      reader.readAsDataURL(blob);
+    });
+  }
+}