Swap Google Doc images with new images from Google Drive - google-apps-script

Question

I have a Google Doc with images (let's say 4 but in reality there are many). I want to replace those with four new images available in Google Drive. I know I can get all images available in the Doc as:
var images = docFile.getBody().getImages();
All are InlineImage when displayed on the console, although a few are in the paragraph and others are inside table cells. The logic I have in my mind is:
Getting the list of images (as done above)
Getting the location of those images (Don't know how)
Delete the image and use appendImage method.
The exact code I tried is:
function imageExtract() {
const tempFile = DocumentApp.openById(idOfFile) //idOfFile is id of Doc file
var images = tempFile.getBody().getImages();
const blob=DriveApp.getFileById(idOfImage) //idOfImage is id of Doc file
for (var i = 0; i < images.length; i++){
Logger.log(images[i].getAttributes())
Logger.log(images[i])
// Here I want to delete the images[i]
// And put blob there
}
}

Answer 1

I believe your current situation and your goal are as follows.
Your Google Document has 4 images. The images are put into the paragraph, list, and table.
You have a list including 4 URLs of the direct links of image data.
You want to replace 1st image in Google Document with the 1st URL of the list.
You want to achieve this using Google Apps Script.
I thought that in this case, when Google Docs API is used, the script might be simple. So, how about the following sample script?
Sample script:
This script uses Google Docs API. So, please enable Docs API at Advanced Google services.
function myFunction() {
// Please set your 4 URLs.
const urls = [
"https://url1",
"https://url2",
"https://url3",
"https://url4",
];
// Retrieve the original title of images and set the unique image titles using Docs API.
const doc = DocumentApp.getActiveDocument();
const images = doc.getBody().getImages();
const titles = images.reduce((m, e, i) => {
const org = e.getAltTitle();
e.setAltTitle(`sample${i}`);
m.set(`sample${i}`, { title: org, uri: urls[i] });
return m;
}, new Map());
doc.saveAndClose();
// Create request body of Docs API.
const { inlineObjects } = Docs.Documents.get(doc.getId(), { fields: "inlineObjects" });
const requests = Object.entries(inlineObjects).reduce((ar, [imageObjectId, { inlineObjectProperties: { embeddedObject } }]) => {
if (embeddedObject.hasOwnProperty("imageProperties")) {
const { uri } = titles.get(embeddedObject.title);
ar.push({ replaceImage: { imageObjectId, uri } });
}
return ar;
}, []);
// Request Docs API using the created request body.
Docs.Documents.batchUpdate({ requests }, doc.getId());
// Set the original titles to the images.
const ar = [...titles];
DocumentApp.getActiveDocument().getBody().getImages().forEach((e, i) => e.setAltTitle(ar[i][1].title));
}
When this script is run, 4 images in Google Document are replaced with the images of 4 URLs.
References:
Method: documents.batchUpdate
ReplaceImageRequest
Added:
I think that your provided sample Document and your provided current script have 2 issues.
When I saw your sample Document, I saw 4 images. But, when I retrieve the images using Google Docs API, 5 images are existing. It seems that one image is not shown. Unfortunately, the reason for TypeError: Cannot destructure property 'uri' of 'titles.get(...)' as it is undefined. is due to this.
From this situation, in my added sample script, the unshown images are ignored. By this, this error is avoided.
I had thought that you have a list including 4 URLs of the direct links of image data. But, unfortunately, when I saw your provided script, the URLs are not the direct link like https://drive.google.com/file/d/{fileId}. In this case, an error occurs when Docs API is requested. I think that this will be your 2nd issue.
When these points are reflected in my proposed sample script, it becomes as follows.
Sample script:
In this sample, Google Docs API and Google Drive API are used. So, please enable Docs API and Drive API at Advanced Google services.
And, please set the file IDs of the image file on your Google Drive. The file ID is ### of https://drive.google.com/file/d/###. Please be careful about this.
function myFunction() {
// Please set the file IDs of the images in your Google Drive.
const fileIds = [
"### file ID 1 ###",
"### file ID 2 ###",
"### file ID 3 ###",
"### file ID 4 ###",
];
// Create direct links of the images.
const urls = fileIds.map(id => Drive.Files.get(id).thumbnailLink.replace(/\=s.+/, "=s512"));
// Retrieve the original title of images and set the unique image titles using Docs API.
const doc = DocumentApp.getActiveDocument();
const images = doc.getBody().getImages();
const titles = images.reduce((m, e, i) => {
const org = e.getAltTitle();
e.setAltTitle(`sample${i}`);
m.set(`sample${i}`, { title: org, uri: urls[i] });
return m;
}, new Map());
doc.saveAndClose();
// Create request body of Docs API.
const { inlineObjects } = Docs.Documents.get(doc.getId(), { fields: "inlineObjects" });
const requests = Object.entries(inlineObjects).reduce((ar, [imageObjectId, { inlineObjectProperties: { embeddedObject } }]) => {
if (embeddedObject.hasOwnProperty("imageProperties") && embeddedObject.title) {
const { uri } = titles.get(embeddedObject.title);
ar.push({ replaceImage: { imageObjectId, uri } });
}
return ar;
}, []);
// Request Docs API using the created request body.
Docs.Documents.batchUpdate({ requests }, doc.getId());
// Set the original titles to the images.
const ar = [...titles];
DocumentApp.getActiveDocument().getBody().getImages().forEach((e, i) => e.setAltTitle(ar[i][1].title));
}