commit c923785a90c0708fe40dfb56a04c1813b85d8ea1 Author: jusax23 Date: Mon Jan 23 21:19:18 2023 +0100 init diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..795255a --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +dist +node_modules +test.ts \ No newline at end of file diff --git a/.npmignore b/.npmignore new file mode 100644 index 0000000..e69de29 diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..312e5d8 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,506 @@ +{ + "name": "dblang", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "dblang", + "version": "1.0.0", + "license": "UNLICENSED", + "dependencies": { + "mariadb": "^3.0.2" + }, + "devDependencies": { + "@types/node": "^18.11.18", + "esbuild": "^0.17.4", + "typescript": "^4.9.4" + } + }, + "node_modules/@esbuild/android-arm": { + "version": "0.17.4", + "resolved": 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"engines": { + "node": ">= 14" + }, + "devDependencies": { + "@types/node": "^18.11.18", + "esbuild": "^0.17.4", + "typescript": "^4.9.4" + } +} diff --git a/src/db.ts b/src/db.ts new file mode 100644 index 0000000..1266a2a --- /dev/null +++ b/src/db.ts @@ -0,0 +1,75 @@ +import mariadb from 'mariadb'; +import { Handler } from './defaultHandler'; +import { Query } from './query'; +import { onAction, primaryData } from './types'; + + +export class DB { + //pool:mariadb.Pool; + constructor(/*{ host, user, password, database, connectionLimit = 5 }*/) { + //this.pool = mariadb.createPool({ host, user, password, database, connectionLimit, multipleStatements: true }); + } + async query(query: Query) { + //return this.pool.query(query); + } + getHandler() { + return Handler; + } + + newTable(name:string){ + return new Table(name); + } +} + +export class Attribute { + name : string; + constructor(name: string){ + this.name = name; + } + serialize(){ + return this.toString(); + } + toString(){ + return this.name; + } +} + + +export class Table{ + dbLangTableName : string; + dbLangTableAttributes:{ [key: string]: Attribute; } = {}; + [key:string]: Attribute | any + constructor(name: string){ + this.dbLangTableName = name; + } + serialize(){ + return this.toString(); + } + toString(){ + return this.dbLangTableName; + } + addAttribute(name:string,ops:{ + unique?: boolean, + A_I?: boolean, + default?: primaryData, + notNull?: boolean + primaryKey?: boolean, + foreginKey?: { + link: Attribute, + onDelete?: onAction, + onUpdate?: onAction + } + },noErrorOnNameConflict = false){ + let attr = new Attribute(name); + this.dbLangTableAttributes[name] = attr; + if(["serialize", "toString","addAttribute","dbLangTableName","dbLangTableAttributes"].includes(name)){ + if(!noErrorOnNameConflict) throw new Error("You cannot name Attribute like Methode of this Table!"); + }else{ + this[name] = attr; + } + return attr; + } +} + +export * from './funcs'; +export {onAction}; \ No newline at end of file diff --git a/src/dbStructure.ts b/src/dbStructure.ts new file mode 100644 index 0000000..186b08e --- /dev/null +++ b/src/dbStructure.ts @@ -0,0 +1,39 @@ +import { Attribute } from "./db"; +import { Handler } from "./defaultHandler"; +import { allModifierInput, primaryData, serializeReturn } from "./types"; + + + +export abstract class Modifier { + t : string; + a : Array; + constructor(type: string, args: (allModifierInput)[]) { + this.t = type; + this.a = args; + } + serialize(handler = Handler):serializeReturn { + return handler.modifiers[this.t as keyof typeof handler.modifiers](this.a); + } +} + +export class BooleanModifier extends Modifier{} +export class NumberModifier extends Modifier{} +export class StringModifier extends Modifier{} + +export class Aggregation{ + t : string; + a : Attribute; + constructor(type: string, args: Attribute) { + this.t = type; + this.a = args; + } + serialize(handler = Handler):serializeReturn{ + return handler.aggregations[this.t as keyof typeof handler.aggregations](this.a); + } +} +export class Joins{ + + serialize(handler = Handler):serializeReturn { + return ["",[]]; + } +} \ No newline at end of file diff --git a/src/defaultHandler.ts b/src/defaultHandler.ts new file mode 100644 index 0000000..9299829 --- /dev/null +++ b/src/defaultHandler.ts @@ -0,0 +1,76 @@ +import { Attribute } from "./db" +import { Aggregation, Modifier } from "./dbStructure" +import { selectQuery } from "./query" +import { allModifierInput, primaryData, serializeReturn } from "./types" + +export class Handler { + static querys = { + select: (q: selectQuery): serializeReturn => { + let args: primaryData[] = []; + let w = joinArg(", ", this)(q.attr); + args.push(...w[1]); + let sql = `select ${w[0]} from ${q.from == null ? 'DUAL' : q.from.serialize(this)}`; + if (q.whereD) { + let whereS = q.whereD.serialize(this); + args.push(...whereS[1]); + sql += " where "+whereS[0]; + } + if (q.groupByD.length>0) { + let groupByS = joinArg(",", this)(q.groupByD); + args.push(...groupByS[1]); + sql += " group by "+groupByS[0]; + if (q.havingD) { + let havingS = q.havingD.serialize(this); + args.push(...havingS[1]); + sql += " having "+havingS[0]; + } + } + + return [sql, args]; + } + } + + static aggregations = { + count: (a: Attribute): serializeReturn => ["count(" + a + ")", []], + sum: (a: Attribute): serializeReturn => ["sum(" + a + ")", []], + avg: (a: Attribute): serializeReturn => ["avg(" + a + ")", []], + min: (a: Attribute): serializeReturn => ["min(" + a + ")", []], + max: (a: Attribute): serializeReturn => ["max(" + a + ")", []], + } + + static modifiers = { + and: joinArg("and", this), + or: joinArg("or", this), + eq: joinArg("=", this), + plus: joinArg("+", this), + minus: joinArg("-", this), + not: (a: allModifierInput[]):serializeReturn => { + let e = a[0]; + if (e instanceof Attribute) return ["not (" + e + ")", []]; + if (e instanceof Modifier || e instanceof selectQuery || e instanceof Aggregation) { + let [sqli, argsi] = e.serialize(this); + return ["not (" + sqli + ")", argsi] + } + return ["not (?)", [e]]; + } + } + +}; + +function joinArg(type: string, s: any) { + return (a: (allModifierInput)[]): serializeReturn => { + let args: primaryData[] = []; + let sql = "(" + a.map(d => { + if (d instanceof Attribute) return d; + if (d instanceof Modifier || d instanceof selectQuery || d instanceof Aggregation) { + let [sqli, argsi] = d.serialize(s); + args.push(...(argsi.flat(Infinity))); + return sqli; + } + args.push(d); + return "?"; + }).join(" " + type + " ") + ")"; + return [sql, args] + + } +} \ No newline at end of file diff --git a/src/funcs.ts b/src/funcs.ts new file mode 100644 index 0000000..700f537 --- /dev/null +++ b/src/funcs.ts @@ -0,0 +1,22 @@ +import { Attribute } from "./db"; +import { Aggregation, BooleanModifier, NumberModifier } from "./dbStructure"; +import { selectQuery } from "./query"; +import { allModifierInput, selectElements, selectFromElements } from "./types"; + +//modifiers +export const and = (...args: (BooleanModifier)[]) => new BooleanModifier("and",args); +export const or = (...args: (BooleanModifier)[]) => new BooleanModifier("or",args); +export const eq = (...args: (allModifierInput)[]) => new BooleanModifier("eq",args); +export const plus = (...args: (allModifierInput)[]) => new NumberModifier("plus",args); +export const minus = (...args: (allModifierInput)[]) => new NumberModifier("minus",args); + +//aggregations + +export const count = (a:Attribute) => new Aggregation("count",a); +export const sum = (a:Attribute) => new Aggregation("sum",a); +export const avg = (a:Attribute) => new Aggregation("avg",a); +export const min = (a:Attribute) => new Aggregation("min",a); +export const max = (a:Attribute) => new Aggregation("max",a); + +//query +export const select = (args: selectElements[],from: selectFromElements) => new selectQuery(args,from); diff --git a/src/query.ts b/src/query.ts new file mode 100644 index 0000000..10e6252 --- /dev/null +++ b/src/query.ts @@ -0,0 +1,47 @@ +import { Attribute, DB } from "./db"; +import { BooleanModifier, Modifier } from "./dbStructure"; +import { Handler } from "./defaultHandler"; +import { primaryData, selectElements, selectFromElements, serializeReturn } from "./types"; + + +export class Query { + sql : string; + values : primaryData[]; + constructor(sql: string, values: primaryData[]) { + this.sql = sql; + this.values = values; + } +} + +export class selectQuery { + attr:selectElements[] = []; + from:selectFromElements; + constructor(a: selectElements[], from:selectFromElements) { + this.attr.push(...a.flat(Infinity)); + this.from = from ? from : null; + } + whereD:BooleanModifier | null = null; + where(m: BooleanModifier) { + this.whereD = m; + return this; + } + groupByD: Attribute[] = []; + groupBy(a: Attribute[]) { + this.groupByD = a; + return this; + } + havingD:Modifier | null = null; + having(m: Modifier) { + this.havingD = m; + return this; + } + + serialize(handler = Handler) : serializeReturn { + return handler.querys.select(this); + } + + query(db: DB) { + const s = this.serialize(db.getHandler()); + return new Query(s[0],s[1]); + } +} \ No newline at end of file diff --git a/src/types.ts b/src/types.ts new file mode 100644 index 0000000..0ecfc4e --- /dev/null +++ b/src/types.ts @@ -0,0 +1,19 @@ +import { Attribute, Table } from "./db"; +import { Aggregation, Joins, Modifier } from "./dbStructure"; +import { selectQuery } from "./query"; + +export type primaryData = string | number | boolean | null; +export type allModifierInput = primaryData | Modifier | selectQuery | Attribute | Aggregation; + +export type selectElements = primaryData | Attribute | Aggregation | selectQuery +export type selectFromElements = Table | Joins | null; + +export type serializeReturn = [string, primaryData[]]; + + +export enum onAction{ + cascade, + noAction, + setNull, + setDefault +} \ No newline at end of file diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..408ec89 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,21 @@ +{ + "compilerOptions": { + "module": "CommonJS", + "lib": ["es6"], + "types": ["node"], + "declaration": true, + "outDir": "dist", + "strict": true, + "esModuleInterop": true, + "moduleResolution": "node", + //"sourceMap": true, + "forceConsistentCasingInFileNames": true + }, + "files": [ + "src/db.ts" + ], + "exclude": [ + "node_modules", + "dist" + ] +} \ No newline at end of file