mirror of
https://github.com/laurent22/joplin.git
synced 2024-12-27 10:32:58 +02:00
77 lines
3.5 KiB
Markdown
77 lines
3.5 KiB
Markdown
# OneNote Converter
|
|
|
|
This package is used to process OneNote backup files and output HTML that Joplin can import.
|
|
|
|
The code is based on the projects created by https://github.com/msiemens
|
|
|
|
We adapted it to target WebAssembly, adding Node.js functions that could interface with the host machine. For that to happen we are using custom-made functions (see `node_functions.js`) and the Node.js standard library (see `src/utils.rs`).
|
|
|
|
## How the OneNote Importer Process Works
|
|
|
|
The requirement for this project was to simplify the migration process from OneNote to Joplin. The starting point of this migration is to export the notebook from OneNote as a `zip` file containing files in the binary format used by OneNote.
|
|
|
|
The process looks like this:
|
|
|
|
1. Unzip the backup file.
|
|
2. Use `onenote-converter` to read and convert the binary files to HTML (this project).
|
|
3. Extract the SVG nodes from the HTML to resources:
|
|
1. Find all SVG nodes in the HTML file.
|
|
2. Create SVG files from the nodes.
|
|
3. Update the HTML file with references to the SVGs.
|
|
4. Use the Importer HTML service to create the Joplin notes and resources.
|
|
|
|
See the `InteropService_Importer_OneNote` class in the `lib` project for details.
|
|
|
|
### SVG Extraction
|
|
|
|
The OneNote drawing feature uses `<svg>` tags to save user drawings. Joplin doesn't support SVG rendering due to security concerns, so we added a step to extract the `<svg>` elements as SVG images, replacing them with `<img>` tags.
|
|
|
|
For each HTML file, we:
|
|
|
|
- Mount the HTML in the document.
|
|
- Find all the `svg` nodes.
|
|
- Replace each `svg` node with an `img` node that has a unique title, which will be used as the resource name.
|
|
- After editing the entire document, update the HTML.
|
|
- Create the SVG images on the local disk with the title used in the replaced `img` tags.
|
|
|
|
After this, the HTML should look the same and is ready to be imported by the Importer HTML service.
|
|
|
|
## Project structure:
|
|
|
|
```
|
|
- onenote-converter
|
|
- package.json -> where the project is built
|
|
- node_functions.js -> where the custom-made functions used inside rust goes
|
|
...
|
|
- pkg -> artifact folder generated in the build step
|
|
- onenote_converter.js -> main file
|
|
...
|
|
- src
|
|
- lib.rs -> starting point
|
|
```
|
|
|
|
## Development requirements:
|
|
|
|
To work with the project you will need:
|
|
|
|
- Rust https://www.rust-lang.org/learn/get-started
|
|
|
|
When working with the Rust code you will probably rather run `yarn buildDev` since it is faster and it has more logging messages (they can be disabled in the macro `log!()`)
|
|
|
|
During development, it will be easier to test it where this library is called. `InteropService_Importer_Onenote.ts` is the code that depends on this and already has some tests.
|
|
|
|
### Running tests and IS_CONTINUOUS_INTEGRATION
|
|
|
|
We don't require developers that won't work on this project to have Rust installed on their machine.
|
|
To make this work we:
|
|
|
|
- Use temporary files, required only for building the application correctly (e.g: `pkg/onenote_converter.js`).
|
|
- Skip the build process if `IS_CONTINUOUS_INTEGRATION` is not set (see `build.js`).
|
|
- Skip some tests if `IS_CONTINUOUS_INTEGRATION` is not set (see `lib/services/interop/InteropService_Importer_OneNote.test.ts`).
|
|
|
|
The tests should still run on CI since `IS_CONTINUOUS_INTEGRATION` is used there.
|
|
|
|
## Security concerns
|
|
|
|
We are using WebAssembly with Node.js calls to the file system, reading and writing files and directories, which means
|
|
it is not isolated (no more than Node.js is, for that matter). |