tokenizer works

backend/src/app.ts

@@ -2,10 +2,12 @@ import express from 'express'
 import { json } from 'body-parser'
 import { Sequelize, Op } from 'sequelize'
 import { database, Character, Game, Pick, App } from './db'
-import { lexr, parseOrderByString, FilterParser } from './tokenizer'
+import { OrderByParser, FilterParser } from './tokenizer'
 
 const app = express()
 const jsonParser = json()
+const fp = new FilterParser()
+const obp = new OrderByParser()
 const port = 3001
 
 app.get('/', (req, res) => {
@@ -36,34 +38,19 @@ app.get('/api/game/:gameId', async (req, res) => {
 })
 
 app.post('/api/game', jsonParser, async (req, res) => {
-  console.log(req.body)
-
   const page = req.body.page || 0
-  const orderBy = req.body.orderBy ? parseOrderByString(req.body.orderBy) : ['id']
+  const orderBy = req.body.orderBy ? obp.parse(req.body.orderBy) : ['id']
   const count = req.body.count || 10
-  const filter = req.body.filter || ''
+  const filter = req.body.filter ? fp.parse(req.body.filter) : {}
 
   const gameData = await Game.findAll({
     offset: page * count,
     limit: count,
     order: orderBy,
-    where: {
-      id: { [Op.eq]: 2 }
-    }
+    where: filter
   })
   const pageCount = Math.ceil((await Character.count()) / count)
 
-  let fp = new FilterParser()
-
-  fp.lexer
-    .input(filter)
-    .tokens()
-    .forEach((t) => {
-      console.log(t)
-    })
-
-  console.log(fp.parseFilter(filter))
-
   res.setHeader('Content-Type', 'application/json')
   res.send({ gameData, pageCount })
 })

backend/src/tokenizer.ts

@@ -1,35 +1,31 @@
 import Tokenizr from 'tokenizr'
-import ASTY from 'asty'
 import { Op } from 'sequelize'
 
-export const lexr = new Tokenizr()
+export class OrderByParser {
+  lexer = new Tokenizr()
 
-lexr.rule(/[AND|OR]/, (ctx, m) => {
-  ctx.accept('conjunction', m[0])
-})
-
-export const orderByLexr = new Tokenizr()
-
-orderByLexr.rule(/,/, (ctx, m) => {
+  constructor() {
+    this.lexer.rule(/,/, (ctx, m) => {
       ctx.accept('spacer')
-})
+    })
 
-orderByLexr.rule(/ASC|DESC/, (ctx, m) => {
+    this.lexer.rule(/ASC|DESC/, (ctx, m) => {
       ctx.accept('direction', m[0])
-})
+    })
 
-orderByLexr.rule(/[a-zA-Z]+/, (ctx, m) => {
+    this.lexer.rule(/[a-zA-Z]+/, (ctx, m) => {
       ctx.accept('column', m[0])
-})
+    })
 
-orderByLexr.rule(/\s/, (ctx, m) => {
+    this.lexer.rule(/\s/, (ctx, m) => {
       ctx.ignore()
-})
+    })
+  }
 
-export function parseOrderByString(orderBy: string) {
+  parse(orderBy: string) {
   const output = []
   let holding = []
-  orderByLexr
+  this.lexer
     .input(orderBy)
     .tokens()
     .forEach((token) => {
@@ -48,6 +44,7 @@ export function parseOrderByString(orderBy: string) {
     output.push(holding)
   }
   return output
+  }
 }
 
 const openGroupRegex = /\(/
@@ -61,55 +58,47 @@ const opperatorMap = {
   '!=': Op.ne,
   '<=': Op.lte,
   '>=': Op.gte,
-  ':': Op.like
+  '>': Op.gt,
+  '<': Op.lt,
+  ':': Op.like,
+  AND: Op.and,
+  OR: Op.or
 }
 
 export class FilterParser {
-  asty: ASTY = new ASTY()
-  lexer: Tokenizr = this.createLexer()
+  lexer: Tokenizr
 
-  constructor() {}
+  constructor() {
+    this.lexer = new Tokenizr()
 
-  private createLexer(): Tokenizr {
-    const tkz = new Tokenizr()
-
-    tkz.rule(openGroupRegex, (ctx, m) => {
+    this.lexer.rule(openGroupRegex, (ctx, m) => {
       ctx.accept('opengroup')
     })
 
-    tkz.rule(closeGroupRegex, (ctx, m) => {
+    this.lexer.rule(closeGroupRegex, (ctx, m) => {
       ctx.accept('closegroup')
     })
 
-    tkz.rule(conjunctinoRegex, (ctx, m) => {
+    this.lexer.rule(conjunctinoRegex, (ctx, m) => {
       ctx.accept('conjunction', m[0])
     })
 
-    tkz.rule(equalityRegex, (ctx, m) => {
+    this.lexer.rule(equalityRegex, (ctx, m) => {
       ctx.accept('column', m[1])
       ctx.accept('opperator', m[2])
       ctx.accept('value', m[3])
     })
 
-    tkz.rule(spacerRegex, (ctx, m) => {
+    this.lexer.rule(spacerRegex, (ctx, m) => {
       ctx.ignore()
     })
-
-    return tkz
   }
 
-  parseFilter(filter: string) {
+  parse(filter: string) {
     this.lexer.input(filter)
-    console.log(`parsing ${filter}`)
-    this.lexer.begin()
-    this.lexer.tokens().forEach((token) => {
-      console.log(token)
-    })
-    this.lexer.rollback()
     let block = this.parseBlock('AND')
     this.lexer.consume('EOF')
     this.lexer.reset()
-
     return block
   }
 
@@ -122,12 +111,8 @@ export class FilterParser {
         () => this.parseEquality(),
         () => this.parseGroup(),
         () => {
-
-          console.log("Conjunct")
-
           let conToken = this.lexer.consume('conjunction')
 
-          console.log("potato")
           if (items.length === 1) {
             activeCon = conToken.value
           }
@@ -137,42 +122,36 @@ export class FilterParser {
           } else {
             return this.parseBlock(conToken.value)
           }
-        }, () => {}
+        },
+        () => this.parseEmpty()
       )
 
       if (nextItem === undefined) {
-        console.log("breaking")
         break
       }
 
       items.push(nextItem)
     }
 
-    return this.asty.create('conjunction').set('type', activeCon).add(items)
+    return { [opperatorMap[activeCon]]: items }
   }
 
-  private parseConjunction() {}
-
   private parseEquality() {
-    console.log("doing an equality")
     let columnToken = this.lexer.consume('column')
     let opperatorToken = this.lexer.consume('opperator')
     let valueToken = this.lexer.consume('value')
 
-    let node = this.asty.create('equality')
+    if (opperatorToken.value === ":") {
 
-    node.pos(columnToken.line, columnToken.column, columnToken.pos)
-
-    node.set(columnToken.type, columnToken.value)
-    node.set(opperatorToken.type, opperatorToken.value)
-    node.set(valueToken.type, valueToken.value)
-    node.set('expression', {
-      [columnToken.value]: {
-        [opperatorMap[opperatorToken.value]]: valueToken.value
+    return {
+      [columnToken.value]: { [opperatorMap[opperatorToken.value]]: `%${valueToken.value.toString()}%` }
     }
-    })
+    } else {
 
-    return node
+    return {
+      [columnToken.value]: { [opperatorMap[opperatorToken.value]]: valueToken.value.toString() }
+    }
+  }
   }
 
   private parseGroup() {
@@ -182,4 +161,8 @@ export class FilterParser {
 
     return block
   }
+
+  private parseEmpty() {
+    return undefined
+  }
 }