nodebatis/src/lib/rule.js

a sql style orm for nodejs

const yaml = require('js-yaml')
const fs = require('fs')

class Rule {
  constructor(file) {
    this.doc = yaml.safeLoad(fs.readFileSync(file, 'utf8'))
    this.namespace = this.doc.namespace
    this.rawSql = new Map()
    this.getAllSql()
  }

  getAllSql() {
    for (let key in this.doc) {
      if (key != 'namespace') {
        this.getSql(key, this.doc[key])
      }
    }
  }

  getSql(name, sql) {
    let sqls = [], cond = {}
    if (typeof sql == 'string') {
      sqls.push(sql.replace(/\n/g, '').trim())
    } else {
      for (let s of sql) {
        if (typeof s == 'string') {
          sqls.push(s.replace(/\n/g, '').trim())
        } else {
          for (let key in s) {
            key = key.trim()
            cond = {}
            cond.name = key
            switch (key) {
              case 'if':
                cond.test = s['if'].test
                cond.sql = s['if'].sql
                break
              case 'for':
                cond.array = s['for'].array || []
                cond.sql = s['for'].sql || ''
                cond.seperator = s['for'].seperator || ','
                break
            }
          }
          sqls.push(cond)
        }
      }
    }
    this.rawSql.set(name, sqls)
  }
}

module.exports = Rule