@ngrx/entity
Version:
Common utilities for entity reducers
185 lines • 25.7 kB
JavaScript
import { createStateOperator, DidMutate } from './state_adapter';
import { createUnsortedStateAdapter } from './unsorted_state_adapter';
import { selectIdValue } from './utils';
export function createSortedStateAdapter(selectId, sort) {
const { removeOne, removeMany, removeAll } = createUnsortedStateAdapter(selectId);
function addOneMutably(entity, state) {
return addManyMutably([entity], state);
}
function addManyMutably(newModels, state) {
const models = newModels.filter((model) => !(selectIdValue(model, selectId) in state.entities));
if (models.length === 0) {
return DidMutate.None;
}
else {
merge(models, state);
return DidMutate.Both;
}
}
function setAllMutably(models, state) {
state.entities = {};
state.ids = [];
addManyMutably(models, state);
return DidMutate.Both;
}
function setOneMutably(entity, state) {
const id = selectIdValue(entity, selectId);
if (id in state.entities) {
state.ids = state.ids.filter((val) => val !== id);
merge([entity], state);
return DidMutate.Both;
}
else {
return addOneMutably(entity, state);
}
}
function setManyMutably(entities, state) {
const didMutateSetOne = entities.map((entity) => setOneMutably(entity, state));
switch (true) {
case didMutateSetOne.some((didMutate) => didMutate === DidMutate.Both):
return DidMutate.Both;
case didMutateSetOne.some((didMutate) => didMutate === DidMutate.EntitiesOnly):
return DidMutate.EntitiesOnly;
default:
return DidMutate.None;
}
}
function updateOneMutably(update, state) {
return updateManyMutably([update], state);
}
function takeUpdatedModel(models, update, state) {
if (!(update.id in state.entities)) {
return false;
}
const original = state.entities[update.id];
const updated = Object.assign({}, original, update.changes);
const newKey = selectIdValue(updated, selectId);
delete state.entities[update.id];
models.push(updated);
return newKey !== update.id;
}
function updateManyMutably(updates, state) {
const models = [];
const didMutateIds = updates.filter((update) => takeUpdatedModel(models, update, state))
.length > 0;
if (models.length === 0) {
return DidMutate.None;
}
else {
const originalIds = state.ids;
const updatedIndexes = [];
state.ids = state.ids.filter((id, index) => {
if (id in state.entities) {
return true;
}
else {
updatedIndexes.push(index);
return false;
}
});
merge(models, state);
if (!didMutateIds &&
updatedIndexes.every((i) => state.ids[i] === originalIds[i])) {
return DidMutate.EntitiesOnly;
}
else {
return DidMutate.Both;
}
}
}
function mapMutably(updatesOrMap, state) {
const updates = state.ids.reduce((changes, id) => {
const change = updatesOrMap(state.entities[id]);
if (change !== state.entities[id]) {
changes.push({ id, changes: change });
}
return changes;
}, []);
return updateManyMutably(updates, state);
}
function mapOneMutably({ map, id }, state) {
const entity = state.entities[id];
if (!entity) {
return DidMutate.None;
}
const updatedEntity = map(entity);
return updateOneMutably({
id: id,
changes: updatedEntity,
}, state);
}
function upsertOneMutably(entity, state) {
return upsertManyMutably([entity], state);
}
function upsertManyMutably(entities, state) {
const added = [];
const updated = [];
for (const entity of entities) {
const id = selectIdValue(entity, selectId);
if (id in state.entities) {
updated.push({ id, changes: entity });
}
else {
added.push(entity);
}
}
const didMutateByUpdated = updateManyMutably(updated, state);
const didMutateByAdded = addManyMutably(added, state);
switch (true) {
case didMutateByAdded === DidMutate.None &&
didMutateByUpdated === DidMutate.None:
return DidMutate.None;
case didMutateByAdded === DidMutate.Both ||
didMutateByUpdated === DidMutate.Both:
return DidMutate.Both;
default:
return DidMutate.EntitiesOnly;
}
}
function merge(models, state) {
models.sort(sort);
const ids = [];
let i = 0;
let j = 0;
while (i < models.length && j < state.ids.length) {
const model = models[i];
const modelId = selectIdValue(model, selectId);
const entityId = state.ids[j];
const entity = state.entities[entityId];
if (sort(model, entity) <= 0) {
ids.push(modelId);
i++;
}
else {
ids.push(entityId);
j++;
}
}
if (i < models.length) {
state.ids = ids.concat(models.slice(i).map(selectId));
}
else {
state.ids = ids.concat(state.ids.slice(j));
}
models.forEach((model, i) => {
state.entities[selectId(model)] = model;
});
}
return {
removeOne,
removeMany,
removeAll,
addOne: createStateOperator(addOneMutably),
updateOne: createStateOperator(updateOneMutably),
upsertOne: createStateOperator(upsertOneMutably),
setAll: createStateOperator(setAllMutably),
setOne: createStateOperator(setOneMutably),
setMany: createStateOperator(setManyMutably),
addMany: createStateOperator(addManyMutably),
updateMany: createStateOperator(updateManyMutably),
upsertMany: createStateOperator(upsertManyMutably),
map: createStateOperator(mapMutably),
mapOne: createStateOperator(mapOneMutably),
};
}
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{\n  EntityState,\n  IdSelector,\n  Comparer,\n  EntityStateAdapter,\n  Update,\n  EntityMap,\n  EntityMapOneNum,\n  EntityMapOneStr,\n} from './models';\nimport { createStateOperator, DidMutate } from './state_adapter';\nimport { createUnsortedStateAdapter } from './unsorted_state_adapter';\nimport { selectIdValue } from './utils';\n\nexport function createSortedStateAdapter<T>(\n  selectId: IdSelector<T>,\n  sort: Comparer<T>\n): EntityStateAdapter<T>;\nexport function createSortedStateAdapter<T>(selectId: any, sort: any): any {\n  type R = EntityState<T>;\n\n  const { removeOne, removeMany, removeAll } = createUnsortedStateAdapter(\n    selectId\n  );\n\n  function addOneMutably(entity: T, state: R): DidMutate;\n  function addOneMutably(entity: any, state: any): DidMutate {\n    return addManyMutably([entity], state);\n  }\n\n  function addManyMutably(newModels: T[], state: R): DidMutate;\n  function addManyMutably(newModels: any[], state: any): DidMutate {\n    const models = newModels.filter(\n      (model) => !(selectIdValue(model, selectId) in state.entities)\n    );\n\n    if (models.length === 0) {\n      return DidMutate.None;\n    } else {\n      merge(models, state);\n      return DidMutate.Both;\n    }\n  }\n\n  function setAllMutably(models: T[], state: R): DidMutate;\n  function setAllMutably(models: any[], state: any): DidMutate {\n    state.entities = {};\n    state.ids = [];\n\n    addManyMutably(models, state);\n\n    return DidMutate.Both;\n  }\n\n  function setOneMutably(entity: T, state: R): DidMutate;\n  function setOneMutably(entity: any, state: any): DidMutate {\n    const id = selectIdValue(entity, selectId);\n    if (id in state.entities) {\n      state.ids = state.ids.filter((val: string | number) => val !== id);\n      merge([entity], state);\n      return DidMutate.Both;\n    } else {\n      return addOneMutably(entity, state);\n    }\n  }\n\n  function setManyMutably(entities: T[], state: R): DidMutate;\n  function setManyMutably(entities: any[], state: any): DidMutate {\n    const didMutateSetOne = entities.map((entity) =>\n      setOneMutably(entity, state)\n    );\n\n    switch (true) {\n      case didMutateSetOne.some((didMutate) => didMutate === DidMutate.Both):\n        return DidMutate.Both;\n      case didMutateSetOne.some(\n        (didMutate) => didMutate === DidMutate.EntitiesOnly\n      ):\n        return DidMutate.EntitiesOnly;\n      default:\n        return DidMutate.None;\n    }\n  }\n\n  function updateOneMutably(update: Update<T>, state: R): DidMutate;\n  function updateOneMutably(update: any, state: any): DidMutate {\n    return updateManyMutably([update], state);\n  }\n\n  function takeUpdatedModel(models: T[], update: Update<T>, state: R): boolean;\n  function takeUpdatedModel(models: any[], update: any, state: any): boolean {\n    if (!(update.id in state.entities)) {\n      return false;\n    }\n\n    const original = state.entities[update.id];\n    const updated = Object.assign({}, original, update.changes);\n    const newKey = selectIdValue(updated, selectId);\n\n    delete state.entities[update.id];\n\n    models.push(updated);\n\n    return newKey !== update.id;\n  }\n\n  function updateManyMutably(updates: Update<T>[], state: R): DidMutate;\n  function updateManyMutably(updates: any[], state: any): DidMutate {\n    const models: T[] = [];\n\n    const didMutateIds =\n      updates.filter((update) => takeUpdatedModel(models, update, state))\n        .length > 0;\n\n    if (models.length === 0) {\n      return DidMutate.None;\n    } else {\n      const originalIds = state.ids;\n      const updatedIndexes: any[] = [];\n      state.ids = state.ids.filter((id: any, index: number) => {\n        if (id in state.entities) {\n          return true;\n        } else {\n          updatedIndexes.push(index);\n          return false;\n        }\n      });\n\n      merge(models, state);\n\n      if (\n        !didMutateIds &&\n        updatedIndexes.every((i: number) => state.ids[i] === originalIds[i])\n      ) {\n        return DidMutate.EntitiesOnly;\n      } else {\n        return DidMutate.Both;\n      }\n    }\n  }\n\n  function mapMutably(map: EntityMap<T>, state: R): DidMutate;\n  function mapMutably(updatesOrMap: any, state: any): DidMutate {\n    const updates: Update<T>[] = state.ids.reduce(\n      (changes: any[], id: string | number) => {\n        const change = updatesOrMap(state.entities[id]);\n        if (change !== state.entities[id]) {\n          changes.push({ id, changes: change });\n        }\n        return changes;\n      },\n      []\n    );\n\n    return updateManyMutably(updates, state);\n  }\n\n  function mapOneMutably(map: EntityMapOneNum<T>, state: R): DidMutate;\n  function mapOneMutably(map: EntityMapOneStr<T>, state: R): DidMutate;\n  function mapOneMutably({ map, id }: any, state: any): DidMutate {\n    const entity = state.entities[id];\n    if (!entity) {\n      return DidMutate.None;\n    }\n\n    const updatedEntity = map(entity);\n    return updateOneMutably(\n      {\n        id: id,\n        changes: updatedEntity,\n      },\n      state\n    );\n  }\n\n  function upsertOneMutably(entity: T, state: R): DidMutate;\n  function upsertOneMutably(entity: any, state: any): DidMutate {\n    return upsertManyMutably([entity], state);\n  }\n\n  function upsertManyMutably(entities: T[], state: R): DidMutate;\n  function upsertManyMutably(entities: any[], state: any): DidMutate {\n    const added: any[] = [];\n    const updated: any[] = [];\n\n    for (const entity of entities) {\n      const id = selectIdValue(entity, selectId);\n      if (id in state.entities) {\n        updated.push({ id, changes: entity });\n      } else {\n        added.push(entity);\n      }\n    }\n\n    const didMutateByUpdated = updateManyMutably(updated, state);\n    const didMutateByAdded = addManyMutably(added, state);\n\n    switch (true) {\n      case didMutateByAdded === DidMutate.None &&\n        didMutateByUpdated === DidMutate.None:\n        return DidMutate.None;\n      case didMutateByAdded === DidMutate.Both ||\n        didMutateByUpdated === DidMutate.Both:\n        return DidMutate.Both;\n      default:\n        return DidMutate.EntitiesOnly;\n    }\n  }\n\n  function merge(models: T[], state: R): void;\n  function merge(models: any[], state: any): void {\n    models.sort(sort);\n\n    const ids: any[] = [];\n\n    let i = 0;\n    let j = 0;\n\n    while (i < models.length && j < state.ids.length) {\n      const model = models[i];\n      const modelId = selectIdValue(model, selectId);\n      const entityId = state.ids[j];\n      const entity = state.entities[entityId];\n\n      if (sort(model, entity) <= 0) {\n        ids.push(modelId);\n        i++;\n      } else {\n        ids.push(entityId);\n        j++;\n      }\n    }\n\n    if (i < models.length) {\n      state.ids = ids.concat(models.slice(i).map(selectId));\n    } else {\n      state.ids = ids.concat(state.ids.slice(j));\n    }\n\n    models.forEach((model, i) => {\n      state.entities[selectId(model)] = model;\n    });\n  }\n\n  return {\n    removeOne,\n    removeMany,\n    removeAll,\n    addOne: createStateOperator(addOneMutably),\n    updateOne: createStateOperator(updateOneMutably),\n    upsertOne: createStateOperator(upsertOneMutably),\n    setAll: createStateOperator(setAllMutably),\n    setOne: createStateOperator(setOneMutably),\n    setMany: createStateOperator(setManyMutably),\n    addMany: createStateOperator(addManyMutably),\n    updateMany: createStateOperator(updateManyMutably),\n    upsertMany: createStateOperator(upsertManyMutably),\n    map: createStateOperator(mapMutably),\n    mapOne: createStateOperator(mapOneMutably),\n  };\n}\n"]}