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Object.defineProperty(exports, "__esModule", { value: true });
exports.create = exports.createAbstractionLayer = exports.createOrm = void 0;
const camelCase = require('camelcase');
const createOrm = ({ entities: externalEntities }) => {
const entities = externalEntities.map((d) => {
const tableName = d.tableName;
const displayName = d.displayName || camelCase(d.tableName);
const collectionDisplayName = d.collectionDisplayName || `${displayName}s`;
const columns = (typeof d.columns === 'function' ? d.columns() : d.columns).map((d) => {
if (typeof d === 'string') {
return {
column: d,
property: camelCase(d),
primaryKey: false
};
}
return Object.assign({ column: d.column, property: d.property || camelCase(d.column), primaryKey: d.primaryKey || false }, (d.references ? { references: d.references } : {}));
});
const propertyNames = columns.map((x) => x.property);
const columnNames = columns.map((x) => x.column);
const prefixedColumnNames = columnNames.map((col) => `${tableName}#${col}`);
const Model = d.Model;
const Collection = d.Collection;
const pkColumnsData = columns.filter((x) => x.primaryKey);
const _primaryKeys = pkColumnsData.map((x) => x.column);
const primaryKeys = _primaryKeys.length > 0 ? _primaryKeys : ['id'];
// Returns unique identifier of model (the values of the primary keys)
const getPkId = (model) => {
return primaryKeys
.map((key) => model[key])
.join('');
};
const references = columns
.filter((x) => x.references)
.reduce((accum, item) => Object.assign({}, accum, {
[item.property]: item.references
}), {});
const selectColumnsClause = prefixedColumnNames
.map((prefixed, index) => `"${tableName}".${columnNames[index]} as "${prefixed}"`)
.join(', ');
return {
tableName,
displayName,
collectionDisplayName,
columns,
propertyNames,
Model,
Collection,
columnNames,
prefixedColumnNames,
primaryKeys,
references,
selectColumnsClause,
getPkId
};
});
const getEntityByTableName = (tableName) => {
const entity = entities.find((data) => data.tableName == tableName);
Iif (!entity) {
throw new Error(`Could not find entity for table ${tableName}`);
}
return entity;
};
const getEntityByModel = (model) => {
const entity = entities.find((data) => data.Model == model.constructor);
Iif (!entity) {
throw new Error(`Could not find entity for class ${model.constructor}`);
}
return entity;
};
/*
* In:
* [
* [Article {id: 32}, ArticleTag {id: 54}]
* [Article {id: 32}, ArticleTag {id: 55}]
* ]
* Out:
* Article {id: 32, ArticleTags articleTags: [ArticleTag {id: 54}, ArticleTag {id: 55}]
*/
const nestClump = (clump) => {
clump = clump.map((x) => Object.values(x));
const root = clump[0][0];
clump = clump.map((row) => row.filter((item, index) => index !== 0));
const built = { [getEntityByModel(root).displayName]: root };
let nodes = [root];
// Wowzer is this both CPU and Memory inefficient
clump.forEach((array) => {
array.forEach((_model) => {
const nodeAlreadySeen = nodes.find((x) => x.constructor.name === _model.constructor.name &&
getEntityByModel(x).getPkId(x) ===
getEntityByModel(_model).getPkId(_model));
const model = nodeAlreadySeen || _model;
const isNodeAlreadySeen = !!nodeAlreadySeen;
const nodePointingToIt = nodes.find((node) => {
const indexes = Object.values(getEntityByModel(node).references)
.map((x, i) => x === model.constructor ? i : null)
.filter((x, i) => x != null);
if (!indexes.length) {
return false;
}
for (const index of indexes) {
const property = Object.keys(getEntityByModel(node).references)[index];
if (node[property] === model.id) {
return true;
}
}
return false;
});
// For first obj type which is has an instance in nodes array,
// get its index in nodes array
const indexOfOldestParent = array.reduce((answer, obj) => {
if (answer != null) {
return answer;
}
const index = nodes.findIndex((n) => n.constructor === obj.constructor);
if (index !== -1) {
return index;
}
return null;
}, null) || 0;
const parentHeirarchy = [
root,
...nodes.slice(0, indexOfOldestParent + 1).reverse()
];
const nodeItPointsTo = parentHeirarchy.find((parent) => {
const index = Object.values(getEntityByModel(model).references).indexOf(parent.constructor);
if (index === -1) {
return false;
}
const property = Object.keys(getEntityByModel(model).references)[index];
return model[property] === parent.id;
});
if (isNodeAlreadySeen) {
if (nodeItPointsTo && !nodePointingToIt) {
nodes = [model, ...nodes];
return;
}
// If the nodePointingToIt (eg, parcel_event) is part of an
// existing collection on this node (eg, parcel) which is a
// nodeAlreadySeen, early return so we don't create it (parcel) on
// the nodePointingToIt (parcel_event), since it (parcel) has been
// shown to be the parent (of parcel_events).
Eif (nodePointingToIt) {
const ec = model[getEntityByModel(nodePointingToIt)
.collectionDisplayName];
if (ec && ec.models.find((m) => m === nodePointingToIt)) {
nodes = [model, ...nodes];
return;
}
}
}
if (nodePointingToIt) {
nodePointingToIt[getEntityByModel(model).displayName] = model;
}
else if (nodeItPointsTo) {
let collection = nodeItPointsTo[getEntityByModel(model).collectionDisplayName];
if (collection) {
collection.models.push(model);
}
else {
const Collection = getEntityByModel(model).Collection;
nodeItPointsTo[getEntityByModel(model).collectionDisplayName] =
new Collection({
models: [model]
});
}
}
else {
Eif (!getEntityByModel(model).getPkId(model)) {
// If the join is fruitless; todo: add a test for this path
return;
}
throw Error(`Could not find how this BO fits: ${JSON.stringify(model)} ${getEntityByModel(model).tableName}`);
}
nodes = [model, ...nodes];
});
});
return built;
};
/*
* Clump array of flat objects into groups based on id of root
* In:
* [
* [Article {id: 32}, ArticleTag {id: 54}]
* [Article {id: 32}, ArticleTag {id: 55}]
* [Article {id: 33}, ArticleTag {id: 56}]
* ]
* Out:
* [
* [
* [Article {id: 32}, ArticleTag {id: 54}]
* [Article {id: 32}, ArticleTag {id: 55}]
* ]
* [
* [Article {id: 33}, ArticleTag {id: 56}]
* ]
* ]
*/
const clumpIntoGroups = (processed) => {
const root = processed[0][0];
const rootBo = root.constructor;
const clumps = processed.reduce((accum, item) => {
const id = getEntityByModel(root)
.primaryKeys.map((key) => { var _a; return (_a = item.find((x) => x.constructor === rootBo)) === null || _a === void 0 ? void 0 : _a[key]; })
.join('@');
if (accum.has(id)) {
accum.set(id, [...accum.get(id), item]);
}
else {
accum.set(id, [item]);
}
return accum;
}, new Map());
return [...clumps.values()];
};
const mapToBos = (objectified) => {
return Object.keys(objectified).map((tableName) => {
const entity = getEntityByTableName(tableName);
const propified = Object.keys(objectified[tableName]).reduce((obj, column) => {
let propertyName = entity.propertyNames[entity.columnNames.indexOf(column)];
Iif (!propertyName) {
if (column.startsWith('meta_')) {
propertyName = camelCase(column);
}
else {
throw Error(`No property name for "${column}" in business object "${entity.displayName}". Non-spec'd columns must begin with "meta_".`);
}
}
obj[propertyName] = objectified[tableName][column];
return obj;
}, {});
return new entity.Model(propified);
});
};
/*
* Make objects (based on special table#column names) from flat database
* return value.
*/
const objectifyDatabaseResult = (result) => {
return Object.keys(result).reduce((obj, text) => {
const tableName = text.split('#')[0];
const column = text.split('#')[1];
Iif (!tableName || !column) {
throw new Error('Column names must be namespaced to table');
}
obj[tableName] = obj[tableName] || {};
obj[tableName][column] = result[text];
return obj;
}, {});
};
const createFromDatabase = (rows) => {
const result = Array.isArray(rows) ? rows : [rows];
const objectified = result.map(objectifyDatabaseResult);
const boified = objectified.map(mapToBos);
const clumps = clumpIntoGroups(boified);
const nested = clumps.map(nestClump);
const models = nested.map((n) => Object.values(n)[0]);
const Collection = getEntityByModel(models[0]).Collection;
return new Collection({ models });
};
const createAnyFromDatabase = (rows, rootKey) => {
if (!rows || !rows.length) {
const Collection = typeof rootKey === 'string'
? getEntityByTableName(rootKey).Collection
: getEntityByModel(rootKey).Collection;
return new Collection({ models: [] });
}
return createFromDatabase(rows);
};
const createOneFromDatabase = (rows) => {
Iif (!rows || !rows.length) {
throw Error('Did not get one.');
}
const collection = createFromDatabase(rows);
Iif (!collection || !collection.models || collection.models.length === 0) {
throw Error('Did not get one.');
}
else Iif (collection.models.length > 1) {
throw Error('Got more than one.');
}
return collection.models[0];
};
const createOneOrNoneFromDatabase = (rows) => {
if (!rows || !rows.length) {
return void 0;
}
return createOneFromDatabase(rows);
};
const createManyFromDatabase = (rows) => {
if (!rows || !rows.length) {
throw Error('Did not get at least one.');
}
return createFromDatabase(rows);
};
return {
getEntityByModel,
createFromDatabase,
createAnyFromDatabase,
createOneFromDatabase,
createOneOrNoneFromDatabase,
createManyFromDatabase,
// tables property for access to select columns clause string
tables: entities.reduce((accum, data) => {
accum[data.displayName] = {
columns: data.selectColumnsClause
};
return accum;
}, {})
};
};
exports.createOrm = createOrm;
const createAbstractionLayer = ({ entities: externalEntities, db, logError }) => {
const orm = (0, exports.createOrm)({ entities: externalEntities });
const defaultErrorHandler = (err) => {
if (!(err.name === 'QueryResultError')) {
if (logError) {
logError(err);
}
}
throw err;
};
/* ------------------------------------------------------------------------*/
/* Query functions --------------------------------------------------------*/
/* ------------------------------------------------------------------------*/
const one = (query, values, errorHandler = defaultErrorHandler) => {
return db
.many(query, values)
.then((rows) => orm.createOneFromDatabase(rows))
.catch(errorHandler);
};
const oneOrNone = (query, values, errorHandler = defaultErrorHandler) => {
return db
.any(query, values)
.then((rows) => orm.createOneOrNoneFromDatabase(rows))
.catch(errorHandler);
};
const many = (query, values, errorHandler = defaultErrorHandler) => {
return db
.any(query, values)
.then((rows) => orm.createManyFromDatabase(rows))
.catch(errorHandler);
};
const any = (query, values, errorHandler = defaultErrorHandler) => {
return db
.result(query, values)
.then((result) => orm.createAnyFromDatabase(result.rows, result.fields[0].name.split('#')[0]))
.catch(errorHandler);
};
const none = (query, values, errorHandler = defaultErrorHandler) => {
return db
.none(query, values)
.then(() => null)
.catch(errorHandler);
};
return Object.assign({}, orm, {
// Query Functions
one,
oneOrNone,
many,
any,
none,
// provide direct access to db
db
});
};
exports.createAbstractionLayer = createAbstractionLayer;
const create = ({ entities: externalEntities, db, logError }) => {
const orm = (0, exports.createAbstractionLayer)({
entities: externalEntities,
db,
logError
});
/* ------------------------------------------------------------------------*/
/* Helper Utilities for CRUD functions ------------------------------------*/
/* ------------------------------------------------------------------------*/
const getSqlInsertParts = (model) => {
const columns = orm
.getEntityByModel(model)
.columnNames.filter((column, index) => model[orm.getEntityByModel(model).propertyNames[index]] !== void 0)
.map((col) => `"${col}"`)
.join(', ');
const values = orm
.getEntityByModel(model)
.propertyNames.map((property) => model[property])
.filter((value) => value !== void 0);
const valuesVar = values.map((value, index) => `$${index + 1}`);
return { columns, values, valuesVar };
};
const getSqlUpdateParts = (model, on = 'id') => {
const clauseArray = orm
.getEntityByModel(model)
.columnNames.filter((sqlColumn, index) => model[orm.getEntityByModel(model).propertyNames[index]] !== void 0)
.map((sqlColumn, index) => `"${sqlColumn}" = $${index + 1}`);
const clause = clauseArray.join(', ');
const idVar = `$${clauseArray.length + 1}`;
const _values = orm
.getEntityByModel(model)
.propertyNames.map((property) => model[property])
.filter((value) => value !== void 0);
const values = [..._values, model[on]];
return { clause, idVar, values };
};
const getMatchingParts = (model) => {
const whereClause = orm
.getEntityByModel(model)
.propertyNames.map((property, index) => model[property] != null
? `"${orm.getEntityByModel(model).tableName}"."${orm.getEntityByModel(model).columnNames[index]}"`
: null)
.filter((x) => x != null)
.map((x, i) => `${x} = $${i + 1}`)
.join(' AND ');
const values = orm
.getEntityByModel(model)
.propertyNames.map((property) => model[property] != null
? model[property]
: null)
.filter((x) => x != null);
return { whereClause, values };
};
// This one returns an object, which allows it to be more versatile.
// To-do: make this one even better and use it instead of the one above.
const getMatchingPartsObject = (model) => {
const whereClause = orm
.getEntityByModel(model)
.propertyNames.map((property, index) => model[property] != null
? `"${orm.getEntityByModel(model).tableName}"."${orm.getEntityByModel(model).columnNames[index]}"`
: null)
.filter((x) => x != null)
.map((x, i) => `${x} = $(${i + 1})`)
.join(' AND ');
const values = orm
.getEntityByModel(model)
.propertyNames.map((property) => model[property] != null
? model[property]
: null)
.filter((x) => x != null)
.reduce((accum, val, index) => Object.assign({}, accum, { [index + 1]: val }), {});
return { whereClause, values };
};
const getNewWith = (model, sqlColumns, values) => {
const Constructor = model.constructor;
const modelKeys = sqlColumns.map((key) => orm.getEntityByModel(model).propertyNames[orm.getEntityByModel(model).columnNames.indexOf(key)]);
const modelData = modelKeys.reduce((data, key, index) => {
data[key] = values[index];
return data;
}, {});
return new Constructor(modelData);
};
const getValueBySqlColumn = (model, sqlColumn) => {
return model[orm.getEntityByModel(model).propertyNames[orm.getEntityByModel(model).columnNames.indexOf(sqlColumn)]];
};
/* ------------------------------------------------------------------------*/
/* Built-in basic CRUD functions ------------------------------------------*/
/* ------------------------------------------------------------------------*/
// Standard create
const create = (model) => {
const { columns, values, valuesVar } = getSqlInsertParts(model);
const query = `
INSERT INTO "${orm.getEntityByModel(model).tableName}" ( ${columns} )
VALUES ( ${valuesVar} )
RETURNING ${orm.getEntityByModel(model).selectColumnsClause};
`;
return orm.one(query, values);
};
// Standard update
const update = (model, { on = 'id' } = {}) => {
const { clause, idVar, values } = getSqlUpdateParts(model, on);
const query = `
UPDATE "${orm.getEntityByModel(model).tableName}"
SET ${clause}
WHERE "${orm.getEntityByModel(model).tableName}".${on} = ${idVar}
RETURNING ${orm.getEntityByModel(model).selectColumnsClause};
`;
return orm.one(query, values);
};
// Standard delete
const _delete = (model) => {
const id = model.id;
const query = `
DELETE FROM "${orm.getEntityByModel(model).tableName}"
WHERE "${orm.getEntityByModel(model).tableName}".id = $(id)
`;
return orm.none(query, { id });
};
const deleteMatching = (model) => {
const { whereClause, values } = getMatchingParts(model);
const query = `
DELETE FROM "${orm.getEntityByModel(model).tableName}"
WHERE ${whereClause};
`;
return orm.none(query, values);
};
const getMatching = (model) => {
const { whereClause, values } = getMatchingParts(model);
const query = `
SELECT ${orm.getEntityByModel(model).selectColumnsClause}
FROM "${orm.getEntityByModel(model).tableName}"
WHERE ${whereClause};
`;
return orm.one(query, values);
};
const getOneOrNoneMatching = (model) => {
const { whereClause, values } = getMatchingParts(model);
const query = `
SELECT ${orm.getEntityByModel(model).selectColumnsClause}
FROM "${orm.getEntityByModel(model).tableName}"
WHERE ${whereClause};
`;
return orm.oneOrNone(query, values);
};
const getAnyMatching = (model) => {
const { whereClause, values } = getMatchingParts(model);
const query = `
SELECT ${orm.getEntityByModel(model).selectColumnsClause}
FROM "${orm.getEntityByModel(model).tableName}"
WHERE ${whereClause};
`;
return orm.any(query, values);
};
const getAllMatching = (model) => {
const { whereClause, values } = getMatchingParts(model);
const query = `
SELECT ${orm.getEntityByModel(model).selectColumnsClause}
FROM "${orm.getEntityByModel(model).tableName}"
WHERE ${whereClause};
`;
return orm.many(query, values);
};
return Object.assign({}, orm, {
// Built-in basic CRUD functions
create,
update,
delete: _delete,
deleteMatching,
getMatching,
getOneOrNoneMatching,
getAnyMatching,
getAllMatching,
// Helper Utility functions
getSqlInsertParts,
getSqlUpdateParts,
getMatchingParts,
getMatchingPartsObject,
getNewWith,
getValueBySqlColumn
});
};
exports.create = create;
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