blob: ad5b2179ce8658d2a37eae662d79ebfd3bb63884 [file] [log] [blame]
/**
* @license
* Copyright 2020 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import {
BasePatchSetNum,
EditInfo,
EDIT,
PARENT,
NumericChangeId,
PatchSetNum,
PreferencesInfo,
RevisionPatchSetNum,
PatchSetNumber,
} from '../../types/common';
import {DefaultBase} from '../../constants/constants';
import {combineLatest, from, fromEvent, Observable, forkJoin, of} from 'rxjs';
import {
map,
filter,
withLatestFrom,
startWith,
switchMap,
} from 'rxjs/operators';
import {
computeAllPatchSets,
computeLatestPatchNum,
computeLatestPatchNumWithEdit,
} from '../../utils/patch-set-util';
import {ParsedChangeInfo} from '../../types/types';
import {fireAlert} from '../../utils/event-util';
import {ChangeInfo} from '../../types/common';
import {RestApiService} from '../../services/gr-rest-api/gr-rest-api';
import {select} from '../../utils/observable-util';
import {assertIsDefined} from '../../utils/common-util';
import {Model} from '../model';
import {UserModel} from '../user/user-model';
import {define} from '../dependency';
import {isOwner} from '../../utils/change-util';
import {
ChangeViewModel,
createChangeUrl,
createDiffUrl,
createEditUrl,
} from '../views/change';
import {NavigationService} from '../../elements/core/gr-navigation/gr-navigation';
export enum LoadingStatus {
NOT_LOADED = 'NOT_LOADED',
LOADING = 'LOADING',
RELOADING = 'RELOADING',
LOADED = 'LOADED',
}
const ERR_REVIEW_STATUS = 'Couldn’t change file review status.';
export interface ChangeState {
/**
* If `change` is undefined, this must be either NOT_LOADED or LOADING.
* If `change` is defined, this must be either LOADED or RELOADING.
*/
loadingStatus: LoadingStatus;
change?: ParsedChangeInfo;
/**
* The list of reviewed files, kept in the model because we want changes made
* in one view to reflect on other views without re-rendering the other views.
* Undefined means it's still loading and empty set means no files reviewed.
*/
reviewedFiles?: string[];
}
/**
* Updates the change object with information from the saved `edit` patchset.
*/
// visible for testing
export function updateChangeWithEdit(
change?: ParsedChangeInfo,
edit?: EditInfo,
viewModelPatchNum?: PatchSetNum
): ParsedChangeInfo | undefined {
if (!change || !edit) return change;
assertIsDefined(edit.commit.commit, 'edit.commit.commit');
if (!change.revisions) change.revisions = {};
change.revisions[edit.commit.commit] = {
_number: EDIT,
basePatchNum: edit.base_patch_set_number,
commit: edit.commit,
fetch: edit.fetch,
};
// If the change was loaded without a specific patchset, then this normally
// means that the *latest* patchset should be loaded. But if there is an
// active edit, then automatically switch to that edit as the current
// patchset.
// TODO: This goes together with `_patchRange.patchNum' being set to `edit`,
// which is still done in change-view. `_patchRange.patchNum` should
// eventually also be model managed, so we can reconcile these two code
// snippets into one location.
if (viewModelPatchNum === undefined) {
change.current_revision = edit.commit.commit;
}
return change;
}
/**
* Derives the base patchset number from all the data that can potentially
* influence it. Mostly just returns `viewModelBasePatchNum` or PARENT, but has
* some special logic when looking at merge commits.
*
* NOTE: At the moment this returns just `viewModelBasePatchNum ?? PARENT`, see
* TODO below.
*/
function computeBase(
viewModelBasePatchNum: BasePatchSetNum | undefined,
patchNum: RevisionPatchSetNum | undefined,
change: ParsedChangeInfo | undefined,
preferences: PreferencesInfo
): BasePatchSetNum {
if (viewModelBasePatchNum && viewModelBasePatchNum !== PARENT) {
return viewModelBasePatchNum;
}
if (!change || !patchNum) return PARENT;
const preferFirst =
preferences.default_base_for_merges === DefaultBase.FIRST_PARENT;
if (!preferFirst) return PARENT;
// TODO: Re-enable respecting the default_base_for_merges preference.
// For the Polygerrit UI this was originally implemented in change 214432,
// but we are not sure whether this was ever 100% working correctly. A
// major challenge is being able to select PARENT explicitly even if your
// preference for the default choice is FIRST_PARENT. <gr-file-list-header>
// just uses `navigation.setUrl()` and the view model does not have any
// way of forcing the basePatchSetNum to stick to PARENT without being
// altered back to FIRST_PARENT here.
// See also corresponding TODO in gr-settings-view.
return PARENT;
// const revisionInfo = new RevisionInfo(change);
// const isMergeCommit = revisionInfo.isMergeCommit(patchNum);
// return isMergeCommit ? (-1 as PatchSetNumber) : PARENT;
}
// TODO: Figure out how to best enforce immutability of all states. Use Immer?
// Use DeepReadOnly?
const initialState: ChangeState = {
loadingStatus: LoadingStatus.NOT_LOADED,
};
export const changeModelToken = define<ChangeModel>('change-model');
export class ChangeModel extends Model<ChangeState> {
private change?: ParsedChangeInfo;
private patchNum?: RevisionPatchSetNum;
private basePatchNum?: BasePatchSetNum;
private latestPatchNum?: PatchSetNumber;
public readonly change$ = select(
this.state$,
changeState => changeState.change
);
public readonly changeLoadingStatus$ = select(
this.state$,
changeState => changeState.loadingStatus
);
public readonly reviewedFiles$ = select(
this.state$,
changeState => changeState?.reviewedFiles
);
public readonly changeNum$ = select(this.change$, change => change?._number);
public readonly repo$ = select(this.change$, change => change?.project);
public readonly labels$ = select(this.change$, change => change?.labels);
public readonly revisions$ = select(
this.change$,
change => change?.revisions
);
public readonly patchsets$ = select(this.change$, change =>
computeAllPatchSets(change)
);
public readonly latestPatchNum$ = select(this.patchsets$, patchsets =>
computeLatestPatchNum(patchsets)
);
public readonly latestPatchNumWithEdit$ = select(this.patchsets$, patchsets =>
computeLatestPatchNumWithEdit(patchsets)
);
/**
* Emits the current patchset number. If the route does not define the current
* patchset num, then this selector waits for the change to be defined and
* returns the number of the latest patchset.
*
* Note that this selector can emit without the change being available!
*/
public readonly patchNum$: Observable<RevisionPatchSetNum | undefined> =
select(
combineLatest([
this.viewModel.state$,
this.state$,
this.latestPatchNumWithEdit$,
]).pipe(
/**
* If you depend on both, view model and change state, then you want to
* filter out inconsistent state, e.g. view model changeNum already
* updated, change not yet reset to undefined.
*/
filter(([viewModelState, changeState, _latestPatchN]) => {
const changeNum = changeState.change?._number;
const viewModelChangeNum = viewModelState?.changeNum;
return changeNum === undefined || changeNum === viewModelChangeNum;
})
),
([viewModelState, _changeState, latestPatchN]) =>
viewModelState?.patchNum || latestPatchN
);
/**
* Emits the base patchset number. This is identical to the
* `viewModel.basePatchNum$`, but has some special logic for merges.
*
* Note that this selector can emit without the change being available!
*/
public readonly basePatchNum$: Observable<BasePatchSetNum> =
/**
* If you depend on both, view model and change state, then you want to
* filter out inconsistent state, e.g. view model changeNum already
* updated, change not yet reset to undefined.
*/
select(
combineLatest([
this.viewModel.state$,
this.state$,
this.userModel.state$,
]).pipe(
filter(([viewModelState, changeState, _]) => {
const changeNum = changeState.change?._number;
const viewModelChangeNum = viewModelState?.changeNum;
return changeNum === undefined || changeNum === viewModelChangeNum;
}),
withLatestFrom(
this.viewModel.basePatchNum$,
this.patchNum$,
this.change$,
this.userModel.preferences$
)
),
([_, viewModelBasePatchNum, patchNum, change, preferences]) =>
computeBase(viewModelBasePatchNum, patchNum, change, preferences)
);
public readonly isOwner$: Observable<boolean> = select(
combineLatest([this.change$, this.userModel.account$]),
([change, account]) => isOwner(change, account)
);
// For usage in `combineLatest` we need `startWith` such that reload$ has an
// initial value.
readonly reload$: Observable<unknown> = fromEvent(document, 'reload').pipe(
startWith(undefined)
);
constructor(
private readonly navigation: NavigationService,
private readonly viewModel: ChangeViewModel,
private readonly restApiService: RestApiService,
private readonly userModel: UserModel
) {
super(initialState);
this.subscriptions = [
combineLatest([this.viewModel.changeNum$, this.reload$])
.pipe(
map(([changeNum, _]) => changeNum),
switchMap(changeNum => {
if (changeNum !== undefined) this.updateStateLoading(changeNum);
const change = from(this.restApiService.getChangeDetail(changeNum));
const edit = from(this.restApiService.getChangeEdit(changeNum));
return forkJoin([change, edit]);
}),
withLatestFrom(this.viewModel.patchNum$),
map(([[change, edit], patchNum]) =>
updateChangeWithEdit(change, edit, patchNum)
)
)
.subscribe(change => {
// The change service is currently a singleton, so we have to be
// careful to avoid situations where the application state is
// partially set for the old change where the user is coming from,
// and partially for the new change where the user is navigating to.
// So setting the change explicitly to undefined when the user
// moves away from diff and change pages (changeNum === undefined)
// helps with that.
this.updateStateChange(change ?? undefined);
}),
this.change$.subscribe(change => (this.change = change)),
this.patchNum$.subscribe(patchNum => (this.patchNum = patchNum)),
this.basePatchNum$.subscribe(
basePatchNum => (this.basePatchNum = basePatchNum)
),
this.latestPatchNum$.subscribe(
latestPatchNum => (this.latestPatchNum = latestPatchNum)
),
combineLatest([this.patchNum$, this.changeNum$, this.userModel.loggedIn$])
.pipe(
switchMap(([patchNum, changeNum, loggedIn]) => {
if (!changeNum || !patchNum || !loggedIn) {
this.updateStateReviewedFiles([]);
return of(undefined);
}
return from(this.fetchReviewedFiles(patchNum, changeNum));
})
)
.subscribe(),
];
}
updateStateReviewedFiles(reviewedFiles: string[]) {
this.updateState({reviewedFiles});
}
updateStateFileReviewed(file: string, reviewed: boolean) {
const current = this.getState();
if (current.reviewedFiles === undefined) {
// Reviewed files haven't loaded yet.
// TODO(dhruvsri): disable updating status if reviewed files are not loaded.
fireAlert(
document,
'Updating status failed. Reviewed files not loaded yet.'
);
return;
}
const reviewedFiles = [...current.reviewedFiles];
// File is already reviewed and is being marked reviewed
if (reviewedFiles.includes(file) && reviewed) return;
// File is not reviewed and is being marked not reviewed
if (!reviewedFiles.includes(file) && !reviewed) return;
if (reviewed) reviewedFiles.push(file);
else reviewedFiles.splice(reviewedFiles.indexOf(file), 1);
this.updateState({reviewedFiles});
}
fetchReviewedFiles(patchNum: PatchSetNum, changeNum: NumericChangeId) {
return this.restApiService
.getReviewedFiles(changeNum, patchNum)
.then(files => {
if (changeNum !== this.change?._number || patchNum !== this.patchNum)
return;
this.updateStateReviewedFiles(files ?? []);
});
}
setReviewedFilesStatus(
changeNum: NumericChangeId,
patchNum: PatchSetNum,
file: string,
reviewed: boolean
) {
return this.restApiService
.saveFileReviewed(changeNum, patchNum, file, reviewed)
.then(() => {
if (changeNum !== this.change?._number || patchNum !== this.patchNum)
return;
this.updateStateFileReviewed(file, reviewed);
})
.catch(() => {
fireAlert(document, ERR_REVIEW_STATUS);
});
}
/**
* Typically you would just subscribe to change$ yourself to get updates. But
* sometimes it is nice to also be able to get the current ChangeInfo on
* demand. So here it is for your convenience.
*/
getChange() {
return this.getState().change;
}
diffUrl(
diffView: {path: string; lineNum?: number},
patchNum = this.patchNum,
basePatchNum = this.basePatchNum
) {
if (!this.change) return;
if (!this.patchNum) return;
return createDiffUrl({
change: this.change,
patchNum,
basePatchNum,
diffView,
});
}
navigateToDiff(
diffView: {path: string; lineNum?: number},
patchNum = this.patchNum,
basePatchNum = this.basePatchNum
) {
const url = this.diffUrl(diffView, patchNum, basePatchNum);
if (!url) return;
this.navigation.setUrl(url);
}
changeUrl(openReplyDialog = false) {
if (!this.change) return;
const isLatest = this.latestPatchNum === this.patchNum;
return createChangeUrl({
change: this.change,
patchNum:
isLatest && this.basePatchNum === PARENT ? undefined : this.patchNum,
basePatchNum: this.basePatchNum,
openReplyDialog,
});
}
navigateToChange(openReplyDialog = false) {
const url = this.changeUrl(openReplyDialog);
if (!url) return;
this.navigation.setUrl(url);
}
editUrl(editView: {path: string; lineNum?: number}) {
if (!this.change) return;
return createEditUrl({
changeNum: this.change._number,
repo: this.change.project,
patchNum: this.patchNum,
editView,
});
}
navigateToEdit(editView: {path: string; lineNum?: number}) {
const url = this.editUrl(editView);
if (!url) return;
this.navigation.setUrl(url);
}
/**
* Check whether there is no newer patch than the latest patch that was
* available when this change was loaded.
*
* @return A promise that yields true if the latest patch
* has been loaded, and false if a newer patch has been uploaded in the
* meantime. The promise is rejected on network error.
*/
fetchChangeUpdates(change: ChangeInfo | ParsedChangeInfo) {
const knownLatest = computeLatestPatchNum(computeAllPatchSets(change));
return this.restApiService.getChangeDetail(change._number).then(detail => {
if (!detail) {
const error = new Error('Change detail not found.');
return Promise.reject(error);
}
const actualLatest = computeLatestPatchNum(computeAllPatchSets(detail));
if (!actualLatest || !knownLatest) {
const error = new Error('Unable to check for latest patchset.');
return Promise.reject(error);
}
return {
isLatest: actualLatest <= knownLatest,
newStatus: change.status !== detail.status ? detail.status : null,
newMessages:
(change.messages || []).length < (detail.messages || []).length
? detail.messages![detail.messages!.length - 1]
: undefined,
};
});
}
/**
* Called when change detail loading is initiated.
*
* If the change number matches the current change in the state, then
* this is a reload. If not, then we not just want to set the state to
* LOADING instead of RELOADING, but we also want to set the change to
* undefined right away. Otherwise components could see inconsistent state:
* a new change number, but an old change.
*/
private updateStateLoading(changeNum: NumericChangeId) {
const current = this.getState();
const reloading = current.change?._number === changeNum;
this.updateState({
change: reloading ? current.change : undefined,
loadingStatus: reloading
? LoadingStatus.RELOADING
: LoadingStatus.LOADING,
});
}
// Private but used in tests.
updateStateChange(change?: ParsedChangeInfo) {
this.updateState({
change,
loadingStatus:
change === undefined ? LoadingStatus.NOT_LOADED : LoadingStatus.LOADED,
});
}
}