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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
/**
* Exceptions reducer
* @module reducers/exceptionss
*/
export function initialExceptionsState() {
return {
// Store exception objects created by actions/exceptions.js's addExceptionFromResources()
// This is keyed by source actor id, and values are arrays of exception objects.
mutableExceptionsMap: new Map(),
};
}
function update(state = initialExceptionsState(), action) {
switch (action.type) {
case "ADD_EXCEPTION":
return updateExceptions(state, action);
case "REMOVE_THREAD": {
return removeExceptionsFromThread(state, action);
}
}
return state;
}
function updateExceptions(state, action) {
const { mutableExceptionsMap } = state;
const { exception } = action;
const { sourceActorId } = exception;
let exceptions = mutableExceptionsMap.get(sourceActorId);
if (!exceptions) {
exceptions = [];
mutableExceptionsMap.set(sourceActorId, exceptions);
} else if (
exceptions.some(({ lineNumber, columnNumber }) => {
return (
lineNumber == exception.lineNumber &&
columnNumber == exception.columnNumber
);
})
) {
// Avoid adding duplicated exceptions for the same line/column
return state;
}
// As these arrays are only used by getSelectedSourceExceptions selector method,
// which coalesce multiple arrays and always return new array instance,
// it isn't important to clone these array in case of modification.
exceptions.push(exception);
return {
...state,
};
}
function removeExceptionsFromThread(state, action) {
const { mutableExceptionsMap } = state;
const { threadActorID } = action;
const sizeBefore = mutableExceptionsMap.size;
for (const [sourceActorId, exceptions] of mutableExceptionsMap) {
// All exceptions relates to the same source actor, and so, the same thread actor.
if (exceptions[0].threadActorId == threadActorID) {
mutableExceptionsMap.delete(sourceActorId);
}
}
if (sizeBefore != mutableExceptionsMap.size) {
return {
...state,
};
}
return state;
}
export default update;
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