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{ Subject } from \"./Subject\"\nimport { DateUtils } from \"../util/DateUtils\"\nimport { ObjectLiteral } from \"../common/ObjectLiteral\"\nimport { OrmUtils } from \"../util/OrmUtils\"\nimport { ApplyValueTransformers } from \"../util/ApplyValueTransformers\"\nimport { ObjectUtils } from \"../util/ObjectUtils\"\n\n/**\n * Finds what columns are changed in the subject entities.\n */\nexport class SubjectChangedColumnsComputer {\n    // -------------------------------------------------------------------------\n    // Public Methods\n    // -------------------------------------------------------------------------\n\n    /**\n     * Finds what columns are changed in the subject entities.\n     */\n    compute(subjects: Subject[]) {\n        subjects.forEach((subject) => {\n            this.computeDiffColumns(subject)\n            this.computeDiffRelationalColumns(subjects, subject)\n        })\n    }\n\n    // -------------------------------------------------------------------------\n    // Protected Methods\n    // -------------------------------------------------------------------------\n\n    /**\n     * Differentiate columns from the updated entity and entity stored in the database.\n     */\n    protected computeDiffColumns(subject: Subject): void {\n        // if there is no persisted entity then nothing to compute changed in it\n        if (!subject.entity) return\n\n        subject.metadata.columns.forEach((column) => {\n            // ignore special columns\n            if (\n                column.isVirtual ||\n                column.isDiscriminator // ||\n                // column.isUpdateDate ||\n                // column.isVersion ||\n                // column.isCreateDate\n            )\n                return\n\n            const changeMap = subject.changeMaps.find(\n                (changeMap) => changeMap.column === column,\n            )\n            if (changeMap) {\n                subject.changeMaps.splice(\n                    subject.changeMaps.indexOf(changeMap),\n                    1,\n                )\n            }\n\n            // get user provided value - column value from the user provided persisted entity\n            const entityValue = column.getEntityValue(subject.entity!)\n\n            // we don't perform operation over undefined properties (but we DO need null properties!)\n            if (entityValue === undefined) return\n\n            // if there is no database entity then all columns are treated as new, e.g. changed\n            if (subject.databaseEntity) {\n                // skip transform database value for json / jsonb for comparison later on\n                const shouldTransformDatabaseEntity =\n                    column.type !== \"json\" && column.type !== \"jsonb\"\n\n                // get database value of the column\n                let databaseValue = column.getEntityValue(\n                    subject.databaseEntity,\n                    shouldTransformDatabaseEntity,\n                )\n\n                // filter out \"relational columns\" only in the case if there is a relation object in entity\n                if (column.relationMetadata) {\n                    const value = column.relationMetadata.getEntityValue(\n                        subject.entity!,\n                    )\n                    if (value !== null && value !== undefined) return\n                }\n                let normalizedValue = entityValue\n                // normalize special values to make proper comparision\n                if (entityValue !== null) {\n                    switch (column.type) {\n                        case \"date\":\n                            normalizedValue =\n                                DateUtils.mixedDateToDateString(entityValue)\n                            break\n\n                        case \"time\":\n                        case \"time with time zone\":\n                        case \"time without time zone\":\n                        case \"timetz\":\n                            normalizedValue =\n                                DateUtils.mixedDateToTimeString(entityValue)\n                            break\n\n                        case \"datetime\":\n                        case \"datetime2\":\n                        case Date:\n                        case \"timestamp\":\n                        case \"timestamp without time zone\":\n                        case \"timestamp with time zone\":\n                        case \"timestamp with local time zone\":\n                        case \"timestamptz\":\n                            normalizedValue =\n                                DateUtils.mixedDateToUtcDatetimeString(\n                                    entityValue,\n                                )\n                            databaseValue =\n                                DateUtils.mixedDateToUtcDatetimeString(\n                                    databaseValue,\n                                )\n                            break\n\n                        case \"json\":\n                        case \"jsonb\":\n                            // JSON.stringify doesn't work because postgresql sorts jsonb before save.\n                            // If you try to save json '[{\"messages\": \"\", \"attribute Key\": \"\", \"level\":\"\"}] ' as jsonb,\n                            // then postgresql will save it as '[{\"level\": \"\", \"message\":\"\", \"attributeKey\": \"\"}]'\n                            if (\n                                OrmUtils.deepCompare(entityValue, databaseValue)\n                            )\n                                return\n                            break\n\n                        case \"simple-array\":\n                            normalizedValue =\n                                DateUtils.simpleArrayToString(entityValue)\n                            databaseValue =\n                                DateUtils.simpleArrayToString(databaseValue)\n                            break\n                        case \"simple-enum\":\n                            normalizedValue =\n                                DateUtils.simpleEnumToString(entityValue)\n                            databaseValue =\n                                DateUtils.simpleEnumToString(databaseValue)\n                            break\n                        case \"simple-json\":\n                            normalizedValue =\n                                DateUtils.simpleJsonToString(entityValue)\n                            databaseValue =\n                                DateUtils.simpleJsonToString(databaseValue)\n                            break\n                    }\n\n                    if (column.transformer) {\n                        normalizedValue = ApplyValueTransformers.transformTo(\n                            column.transformer,\n                            entityValue,\n                        )\n                    }\n                }\n\n                // if value is not changed - then do nothing\n                if (\n                    Buffer.isBuffer(normalizedValue) &&\n                    Buffer.isBuffer(databaseValue)\n                ) {\n                    if (normalizedValue.equals(databaseValue)) {\n                        return\n                    }\n                } else {\n                    if (normalizedValue === databaseValue) return\n                }\n            }\n\n            if (!subject.diffColumns.includes(column))\n                subject.diffColumns.push(column)\n\n            subject.changeMaps.push({\n                column: column,\n                value: entityValue,\n            })\n        })\n    }\n\n    /**\n     * Difference columns of the owning one-to-one and many-to-one columns.\n     */\n    protected computeDiffRelationalColumns(\n        allSubjects: Subject[],\n        subject: Subject,\n    ): void {\n        // if there is no persisted entity then nothing to compute changed in it\n        if (!subject.entity) return\n\n        subject.metadata.relationsWithJoinColumns.forEach((relation) => {\n            // get the related entity from the persisted entity\n            let relatedEntity = relation.getEntityValue(subject.entity!)\n\n            // we don't perform operation over undefined properties (but we DO need null properties!)\n            if (relatedEntity === undefined) return\n\n            // if there is no database entity then all relational columns are treated as new, e.g. changed\n            if (subject.databaseEntity) {\n                // here we cover two scenarios:\n                // 1. related entity can be another entity which is natural way\n                // 2. related entity can be just an entity id\n                // if relation entity is just a relation id set (for example post.tag = 1)\n                // then we create an id map from it to make a proper comparision\n                let relatedEntityRelationIdMap: ObjectLiteral = relatedEntity\n                if (\n                    relatedEntityRelationIdMap !== null &&\n                    ObjectUtils.isObject(relatedEntityRelationIdMap)\n                )\n                    relatedEntityRelationIdMap = relation.getRelationIdMap(\n                        relatedEntityRelationIdMap,\n                    )!\n\n                // get database related entity. Since loadRelationIds are used on databaseEntity\n                // related entity will contain only its relation ids\n                const databaseRelatedEntityRelationIdMap =\n                    relation.getEntityValue(subject.databaseEntity)\n\n                // if relation ids are equal then we don't need to update anything\n                const areRelatedIdsEqual = OrmUtils.compareIds(\n                    relatedEntityRelationIdMap,\n                    databaseRelatedEntityRelationIdMap,\n                )\n                if (areRelatedIdsEqual) {\n                    return\n                } else {\n                    subject.diffRelations.push(relation)\n                }\n            }\n\n            // if there is an inserted subject for the related entity of the persisted entity then use it as related entity\n            // this code is used for related entities without ids to be properly inserted (and then updated if needed)\n            const valueSubject = allSubjects.find(\n                (subject) =>\n                    subject.mustBeInserted && subject.entity === relatedEntity,\n            )\n            if (valueSubject) relatedEntity = valueSubject\n\n            // find if there is already a relation to be changed\n            const changeMap = subject.changeMaps.find(\n                (changeMap) => changeMap.relation === relation,\n            )\n            if (changeMap) {\n                // and update its value if it was found\n                changeMap.value = relatedEntity\n            } else {\n                // if it wasn't found add a new relation for change\n                subject.changeMaps.push({\n                    relation: relation,\n                    value: relatedEntity,\n                })\n            }\n        })\n    }\n}\n"],"sourceRoot":".."}