proposal: Cancel assemblies optional

packages/@uppy/core/src/Uppy.js

@@ -807,8 +807,8 @@ class Uppy {
     return this.#runUpload(uploadID)
   }
 
-  cancelAll () {
-    this.emit('cancel-all')
+  cancelAll ({ reason = 'user' } = {}) {
+    this.emit('cancel-all', { reason })
 
     const { files } = this.getState()
 
@@ -838,6 +838,7 @@ class Uppy {
     return this.#runUpload(uploadID)
   }
 
+  // todo remove in next major. what is the point of the reset method when we have cancelAll or vice versa?
   reset () {
     this.cancelAll()
   }
@@ -1234,10 +1235,10 @@ class Uppy {
   /**
    * Uninstall all plugins and close down this Uppy instance.
    */
-  close () {
+  close ({ reason } = {}) {
     this.log(`Closing Uppy instance ${this.opts.id}: removing all files and uninstalling plugins`)
 
-    this.reset()
+    this.cancelAll({ reason })
 
     this.#storeUnsubscribe()
 

packages/@uppy/react/src/useUppy.js

@@ -17,7 +17,7 @@ module.exports = function useUppy (factory) {
 
   useEffect(() => {
     return () => {
-      uppy.current.close()
+      uppy.current.close({ reason: 'unmount' })
     }
   }, [])
 

packages/@uppy/transloadit/src/index.js

@@ -388,19 +388,18 @@ module.exports = class Transloadit extends BasePlugin {
   /**
    * When all files are removed, cancel in-progress Assemblies.
    */
-  #onCancelAll = () => {
-    const { uploadsAssemblies } = this.getPluginState()
-
-    const assemblyIDs = Object.values(uploadsAssemblies).flat(1)
+  #onCancelAll = async ({ reason } = {}) => {
+    try {
+      if (reason !== 'user') return
 
-    const cancelPromises = assemblyIDs.map((assemblyID) => {
-      const assembly = this.getAssembly(assemblyID)
-      return this.#cancelAssembly(assembly)
-    })
+      const { uploadsAssemblies } = this.getPluginState()
+      const assemblyIDs = Object.values(uploadsAssemblies).flat(1)
+      const assemblies = assemblyIDs.map((assemblyID) => this.getAssembly(assemblyID))
 
-    Promise.all(cancelPromises).catch((err) => {
+      await Promise.all(assemblies.map((assembly) => this.#cancelAssembly(assembly)))
+    } catch (err) {
       this.uppy.log(err)
-    })
+    }
   }
 
   /**

website/src/docs/core.md

@@ -559,10 +559,6 @@ Retry an upload (after an error, for example).
 
 Retry all uploads (after an error, for example).
 
-### `uppy.cancelAll()`
-
-Cancel all uploads, reset progress and remove all files.
-
 ### `uppy.setState(patch)`
 
 Update Uppy’s internal state. Usually, this method is called internally, but in some cases it might be useful to alter something directly, especially when implementing your own plugins.
@@ -673,14 +669,16 @@ uppy.getPlugin('Dashboard').setOptions({
 })
 ```
 
-### `uppy.reset()`
+### `uppy.reset()` (alias `uppy.cancelAll()`)
 
 Stop all uploads in progress and clear file selection, set progress to 0. More or less, it returns things to the way they were before any user input.
 
-### `uppy.close()`
+### `uppy.close({ reason = 'user' })`
 
 Uninstall all plugins and close down this Uppy instance. Also runs `uppy.reset()` before uninstalling.
 
+* `reason`: If set to the string `user`, it will also cancel any running Transloadit assemblies. Set to `unmount` to disable this behavior.
+
 ### `uppy.logout()`
 
 Calls `provider.logout()` on each remote provider plugin (Google Drive, Instagram, etc). Useful, for example, after your users log out of their account in your app — this will clean things up with Uppy cloud providers as well, for extra security.