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perf(api): Lookup subscriber preferences with a single database query #7119

Merged
merged 12 commits into from
Nov 28, 2024
Merged

perf(api): Lookup subscriber preferences with a single database query #7119

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9e8f3a6
refactor(preferences): Extract merge logic to new class
rifont Nov 24, 2024
38a8be6
refactor: Remove Map usage in preference reduction
rifont Nov 24, 2024
2af8da6
feat(preferences): incorporate global subscriber preferences
rifont Nov 24, 2024
5b5f07c
refactor(preferences): Use command in merge operations
rifont Nov 25, 2024
6c9b76e
test(merge-preferences): add test cases for merging logic
rifont Nov 27, 2024
67f276b
refactor(preferences): simplify preference merging logic
rifont Nov 28, 2024
ef02b6b
refactor(preferences): Optimize preferences fetching
rifont Nov 28, 2024
bb35be8
refactor(get-preferences): simplify preference fetching
rifont Nov 28, 2024
a5da0b1
Merge branch 'next' into simplify-subscriber-preference-retrieval
rifont Nov 28, 2024
db660a6
fix(get-preferences): add templateId to preference query
rifont Nov 28, 2024
45c08bf
refactor(preferences): simplify merge logic in tests
rifont Nov 28, 2024
92c346a
refactor: Add DeepRequired type and Instrument decorator
rifont Nov 28, 2024
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174 changes: 7 additions & 167 deletions libs/application-generic/src/usecases/get-preferences/get-preferences.usecase.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,8 @@ import { deepMerge } from '../../utils';
import { GetPreferencesCommand } from './get-preferences.command';
import { GetPreferencesResponseDto } from './get-preferences.dto';
import { InstrumentUsecase } from '../../instrumentation';
import { MergePreferences } from '../merge-preferences/merge-preferences.usecase';
import { MergePreferencesCommand } from '../merge-preferences/merge-preferences.command';

class PreferencesNotFoundException extends BadRequestException {
constructor(featureFlagCommand: GetPreferencesCommand) {
Expand All @@ -32,7 +34,11 @@ export class GetPreferences {
throw new PreferencesNotFoundException(command);
}

const mergedPreferences = this.mergePreferences(items, command.templateId);
const mergedPreferences = MergePreferences.merge(
MergePreferencesCommand.create({
preferences: items,
}),
);

if (!mergedPreferences.preferences) {
throw new PreferencesNotFoundException(command);
Expand Down Expand Up @@ -99,172 +105,6 @@ export class GetPreferences {
return mappedPreferences;
}

private mergePreferences(
items: PreferencesEntity[],
workflowId?: string,
): GetPreferencesResponseDto {
const workflowResourcePreferences =
this.getWorkflowResourcePreferences(items);
const workflowUserPreferences = this.getWorkflowUserPreferences(items);

const workflowPreferences = deepMerge(
[workflowResourcePreferences, workflowUserPreferences]
.filter((preference) => preference !== undefined)
.map((item) => item.preferences),
) as WorkflowPreferences;

const subscriberGlobalPreferences =
this.getSubscriberGlobalPreferences(items);
const subscriberWorkflowPreferences = this.getSubscriberWorkflowPreferences(
items,
workflowId,
);

const subscriberPreferences = deepMerge(
[subscriberGlobalPreferences, subscriberWorkflowPreferences]
.filter((preference) => preference !== undefined)
.map((item) => item.preferences),
);

/**
* Order is important here because we like the workflowPreferences (that comes from the bridge)
* to be overridden by any other preferences and then we have preferences defined in dashboard and
* then subscribers global preferences and the once that should be used if it says other then anything before it
* we use subscribers workflow preferences
*/
const preferencesEntities = [
workflowResourcePreferences,
workflowUserPreferences,
subscriberGlobalPreferences,
subscriberWorkflowPreferences,
];
const source = Object.values(PreferencesTypeEnum).reduce(
(acc, type) => {
const preference = items.find((item) => item.type === type);
if (preference) {
acc[type] = preference.preferences as WorkflowPreferences;
} else {
acc[type] = null;
}

return acc;
},
{} as GetPreferencesResponseDto['source'],
);
const preferences = preferencesEntities
.filter((preference) => preference !== undefined)
.map((item) => item.preferences);

// ensure we don't merge on an empty list
if (preferences.length === 0) {
return { preferences: undefined, type: undefined, source };
}

const readOnlyFlag = workflowPreferences?.all?.readOnly;

// Determine the most specific preference applied
let mostSpecificPreference: PreferencesTypeEnum | undefined;
if (subscriberWorkflowPreferences && !readOnlyFlag) {
mostSpecificPreference = PreferencesTypeEnum.SUBSCRIBER_WORKFLOW;
} else if (subscriberGlobalPreferences && !readOnlyFlag) {
mostSpecificPreference = PreferencesTypeEnum.SUBSCRIBER_GLOBAL;
} else if (workflowUserPreferences) {
mostSpecificPreference = PreferencesTypeEnum.USER_WORKFLOW;
} else if (workflowResourcePreferences) {
mostSpecificPreference = PreferencesTypeEnum.WORKFLOW_RESOURCE;
}

// If workflowPreferences have readOnly flag set to true, disregard subscriber preferences
if (readOnlyFlag) {
return {
preferences: workflowPreferences,
type: mostSpecificPreference,
source,
};
}

/**
* Order is (almost exactly) reversed of that above because 'readOnly' should be prioritized
* by the Dashboard (userPreferences) the most.
*/
const orderedPreferencesForReadOnly = [
subscriberWorkflowPreferences,
subscriberGlobalPreferences,
workflowResourcePreferences,
workflowUserPreferences,
]
.filter((preference) => preference !== undefined)
.map((item) => item.preferences);

const readOnlyPreferences = orderedPreferencesForReadOnly.map(
({ all }) => ({
all: { readOnly: all?.readOnly || false },
}),
) as WorkflowPreferences[];

const readOnlyPreference = deepMerge([...readOnlyPreferences]);

if (Object.keys(subscriberPreferences).length === 0) {
return {
preferences: workflowPreferences,
type: mostSpecificPreference,
source,
};
}
// if the workflow should be readonly, we return the resource preferences default value for workflow.
if (readOnlyPreference?.all?.readOnly) {
subscriberPreferences.all.enabled = workflowPreferences?.all?.enabled;
}

// making sure we respond with correct readonly values.
const mergedPreferences = deepMerge([
workflowPreferences,
subscriberPreferences,
readOnlyPreference,
]) as WorkflowPreferences;

return {
preferences: mergedPreferences,
type: mostSpecificPreference,
source,
};
}

private getSubscriberWorkflowPreferences(
items: PreferencesEntity[],
templateId: string,
) {
return items.find(
(item) =>
item.type === PreferencesTypeEnum.SUBSCRIBER_WORKFLOW &&
item._templateId === templateId,
);
}

private getSubscriberGlobalPreferences(
items: PreferencesEntity[],
): PreferencesEntity | undefined {
return items.find(
(item) => item.type === PreferencesTypeEnum.SUBSCRIBER_GLOBAL,
);
}

private getWorkflowUserPreferences(
items: PreferencesEntity[],
): PreferencesEntity | undefined {
return items.find(
(item) => item.type === PreferencesTypeEnum.USER_WORKFLOW,
);
}

private getWorkflowResourcePreferences(
items: PreferencesEntity[],
): PreferencesEntity | undefined {
return items.find(
(item) => item.type === PreferencesTypeEnum.WORKFLOW_RESOURCE,
);
}

private async getPreferencesFromDb(
command: GetPreferencesCommand,
): Promise<PreferencesEntity[]> {
Expand Down
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