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JS Bin // source https://jsbin.com/pesovadeyi
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <textarea rows=5 style="width:100%" id="source" onChange="updateQuery(this.value)"></textarea> | |
| <textarea rows=5 style="width:100%" id="result"></textarea> | |
| <script id="jsbin-javascript"> | |
| //var re = /(?:SELECT\s+?([a-z][a-z0-9_,.()* ]*?)\s+){1}(?:FROM\s+([a-z_][a-z_$0-9@]+)\s+?){1}(?:JOIN\s+([a-z_][a-z_$0-9@]*?)\s+ON\s+([a-z][a-z0-9_,.]*?)\s+=\s+([a-z][a-z0-9_,.]*)\s+?)*(?:GROUP\sBY\s+?([a-z][a-z0-9_,.()*]+)\s*)?(?:ORDER\sBY\s+?([a-z][a-z0-9_,.]*)\s*?)?/i; | |
| var query = 'SELECT bills.vendor.name, bills.person.first_name FROM bills JOIN persons ON bills.person=person.id JOIN vendors ON bills.vendor=vendors.id GROUP BY count(*) ORDER BY bill.id'; | |
| function updateQuery(query) { | |
| console.log(query.match(re)) | |
| document.getElementById('result').value = new BuildMongoQuery(query) | |
| } | |
| document.getElementById('source').value = query | |
| document.getElementById('result').value = new BuildMongoQuery(query); | |
| function BuildMongoQuery(query) { | |
| this.query = query; | |
| this.tokens = []; | |
| this.mongoQuery = []; | |
| this.selects = {}; | |
| this.from = ''; | |
| var tokens = [ | |
| 'SELECT', | |
| 'FROM', | |
| 'JOIN', | |
| 'WHERE', | |
| 'GROUP BY', | |
| 'ORDER BY' | |
| ] | |
| this.build = function() { | |
| if(!this.query) | |
| return new Error('query is required'); | |
| this.parts = []; | |
| this.parseSql(); | |
| //return this.addJoins().addSelect(this.parts[1]).From(this.parts[2]).addGroupBy(this.parts[3]).toString(); | |
| } | |
| this.parseSql = function() { | |
| var re = /[A-Za-z_.]+\(.*?\)+|\(.*?\)+|"(?:[^"]|\"|"")*"+|'[^'](?:|\'|'')*'+|`(?:[^`]|``)*`+|[^ ,]+|,/ig | |
| this.tokens = this.query.match(re); | |
| console.log("Tokens", this.tokens) | |
| this.getSelectFromQuery(); | |
| var afterFromIndex = this.tokens.indexOf("FROM") +1; | |
| var untilFromLength = (this.tokens.indexOf("JOIN") != -1 ? this.tokens.indexOf("JOIN") : this.tokens.indexOf("WHERE")) - afterFromIndex; | |
| this.addFrom(this.tokens.splice(afterFromIndex, untilFromLength).pop()) | |
| var afterJoinIndex = this.tokens.indexOf("JOIN")+1; | |
| var untilJoinLength = (this.tokens.indexOf("WHERE") != -1 ? this.tokens.indexOf("WHERE") : this.tokens.indexOf("GROUP")) - afterJoinIndex; | |
| this.addJoins(this.tokens.splice(afterJoinIndex, untilJoinLength)) | |
| } | |
| this.addGroupBy = function(group_by) { | |
| // TODO: $group statement build | |
| console.log("Group by: ", group_by) | |
| return this; | |
| } | |
| this.getSelectFromQuery = function() { | |
| var afterSelectIndex = this.tokens.indexOf("SELECT") +1; | |
| var untilSelectsLength = this.tokens.indexOf("FROM") - afterSelectIndex; | |
| this.addSelect(this.tokens.splice(afterSelectIndex, untilSelectsLength).filter(function(select){ return select != ","})); | |
| } | |
| this.addSelect = function(selected_attributes) { | |
| this.selects = selected_attributes; | |
| // TODO: $project statement build | |
| console.log("Selected attributes: ", selected_attributes) | |
| return this; | |
| } | |
| this.addFrom = function(from_table) { | |
| console.log("From table: ", from_table) | |
| this.from = from_table; | |
| return this; | |
| } | |
| this.addWhere = function(where_query) { | |
| this.selects = selected_attributes; | |
| // TODO: $project statement build | |
| console.log("Selected attributes: ", selected_attributes) | |
| return this; | |
| } | |
| this.addJoins = function(joins) { | |
| console.log("With joins: ", joins); | |
| joins = joins.reduce(function(acc, item) { | |
| if(item == "JOIN") { | |
| acc.push([]) | |
| } | |
| else { | |
| if(item == "ON") | |
| return acc; | |
| var lastIdx = acc.length > 0 ? acc.length -1 : 0; | |
| acc[lastIdx] = acc[lastIdx] || []; | |
| acc[lastIdx].push(item) | |
| } | |
| return acc; | |
| },[]).map((join)=>{ | |
| table_name = join[0]; | |
| attrs = join[1].split("=") | |
| attrs = attrs.reduce((acc, attr) => { | |
| if(this.from && attr.indexOf(this.from) != -1) | |
| acc.localField= attr.split(".").pop(); | |
| else | |
| acc.foreignField= attr.split(".").pop(); | |
| return acc; | |
| },{}) | |
| this.mongoQuery.push({ | |
| $lookup: { | |
| "from" : table_name, | |
| "localField" : attrs.localField, | |
| "foreignField" : attrs.foreignField, | |
| "as" : attrs.localField | |
| } | |
| }) | |
| this.mongoQuery.push( { | |
| $unwind: "$"+attrs.localField | |
| }); | |
| }) | |
| return this; | |
| } | |
| function getLastIndexBeforeNextToken(currentIndex) { | |
| } | |
| this.toString = function() { | |
| return "db.getCollection('"+this.from+"').aggregate(\n"+JSON.stringify(this.mongoQuery,null, 2)+"\n);" | |
| } | |
| return this.build(); | |
| } | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">//var re = /(?:SELECT\s+?([a-z][a-z0-9_,.()* ]*?)\s+){1}(?:FROM\s+([a-z_][a-z_$0-9@]+)\s+?){1}(?:JOIN\s+([a-z_][a-z_$0-9@]*?)\s+ON\s+([a-z][a-z0-9_,.]*?)\s+=\s+([a-z][a-z0-9_,.]*)\s+?)*(?:GROUP\sBY\s+?([a-z][a-z0-9_,.()*]+)\s*)?(?:ORDER\sBY\s+?([a-z][a-z0-9_,.]*)\s*?)?/i; | |
| var query = 'SELECT bills.vendor.name, bills.person.first_name FROM bills JOIN persons ON bills.person=person.id JOIN vendors ON bills.vendor=vendors.id GROUP BY count(*) ORDER BY bill.id'; | |
| function updateQuery(query) { | |
| console.log(query.match(re)) | |
| document.getElementById('result').value = new BuildMongoQuery(query) | |
| } | |
| document.getElementById('source').value = query | |
| document.getElementById('result').value = new BuildMongoQuery(query); | |
| function BuildMongoQuery(query) { | |
| this.query = query; | |
| this.tokens = []; | |
| this.mongoQuery = []; | |
| this.selects = {}; | |
| this.from = ''; | |
| var tokens = [ | |
| 'SELECT', | |
| 'FROM', | |
| 'JOIN', | |
| 'WHERE', | |
| 'GROUP BY', | |
| 'ORDER BY' | |
| ] | |
| this.build = function() { | |
| if(!this.query) | |
| return new Error('query is required'); | |
| this.parts = []; | |
| this.parseSql(); | |
| //return this.addJoins().addSelect(this.parts[1]).From(this.parts[2]).addGroupBy(this.parts[3]).toString(); | |
| } | |
| this.parseSql = function() { | |
| var re = /[A-Za-z_.]+\(.*?\)+|\(.*?\)+|"(?:[^"]|\"|"")*"+|'[^'](?:|\'|'')*'+|`(?:[^`]|``)*`+|[^ ,]+|,/ig | |
| this.tokens = this.query.match(re); | |
| console.log("Tokens", this.tokens) | |
| this.getSelectFromQuery(); | |
| var afterFromIndex = this.tokens.indexOf("FROM") +1; | |
| var untilFromLength = (this.tokens.indexOf("JOIN") != -1 ? this.tokens.indexOf("JOIN") : this.tokens.indexOf("WHERE")) - afterFromIndex; | |
| this.addFrom(this.tokens.splice(afterFromIndex, untilFromLength).pop()) | |
| var afterJoinIndex = this.tokens.indexOf("JOIN")+1; | |
| var untilJoinLength = (this.tokens.indexOf("WHERE") != -1 ? this.tokens.indexOf("WHERE") : this.tokens.indexOf("GROUP")) - afterJoinIndex; | |
| this.addJoins(this.tokens.splice(afterJoinIndex, untilJoinLength)) | |
| } | |
| this.addGroupBy = function(group_by) { | |
| // TODO: $group statement build | |
| console.log("Group by: ", group_by) | |
| return this; | |
| } | |
| this.getSelectFromQuery = function() { | |
| var afterSelectIndex = this.tokens.indexOf("SELECT") +1; | |
| var untilSelectsLength = this.tokens.indexOf("FROM") - afterSelectIndex; | |
| this.addSelect(this.tokens.splice(afterSelectIndex, untilSelectsLength).filter(function(select){ return select != ","})); | |
| } | |
| this.addSelect = function(selected_attributes) { | |
| this.selects = selected_attributes; | |
| // TODO: $project statement build | |
| console.log("Selected attributes: ", selected_attributes) | |
| return this; | |
| } | |
| this.addFrom = function(from_table) { | |
| console.log("From table: ", from_table) | |
| this.from = from_table; | |
| return this; | |
| } | |
| this.addWhere = function(where_query) { | |
| this.selects = selected_attributes; | |
| // TODO: $project statement build | |
| console.log("Selected attributes: ", selected_attributes) | |
| return this; | |
| } | |
| this.addJoins = function(joins) { | |
| console.log("With joins: ", joins); | |
| joins = joins.reduce(function(acc, item) { | |
| if(item == "JOIN") { | |
| acc.push([]) | |
| } | |
| else { | |
| if(item == "ON") | |
| return acc; | |
| var lastIdx = acc.length > 0 ? acc.length -1 : 0; | |
| acc[lastIdx] = acc[lastIdx] || []; | |
| acc[lastIdx].push(item) | |
| } | |
| return acc; | |
| },[]).map((join)=>{ | |
| table_name = join[0]; | |
| attrs = join[1].split("=") | |
| attrs = attrs.reduce((acc, attr) => { | |
| if(this.from && attr.indexOf(this.from) != -1) | |
| acc.localField= attr.split(".").pop(); | |
| else | |
| acc.foreignField= attr.split(".").pop(); | |
| return acc; | |
| },{}) | |
| this.mongoQuery.push({ | |
| $lookup: { | |
| "from" : table_name, | |
| "localField" : attrs.localField, | |
| "foreignField" : attrs.foreignField, | |
| "as" : attrs.localField | |
| } | |
| }) | |
| this.mongoQuery.push( { | |
| $unwind: "$"+attrs.localField | |
| }); | |
| }) | |
| return this; | |
| } | |
| function getLastIndexBeforeNextToken(currentIndex) { | |
| } | |
| this.toString = function() { | |
| return "db.getCollection('"+this.from+"').aggregate(\n"+JSON.stringify(this.mongoQuery,null, 2)+"\n);" | |
| } | |
| return this.build(); | |
| }</script></body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| //var re = /(?:SELECT\s+?([a-z][a-z0-9_,.()* ]*?)\s+){1}(?:FROM\s+([a-z_][a-z_$0-9@]+)\s+?){1}(?:JOIN\s+([a-z_][a-z_$0-9@]*?)\s+ON\s+([a-z][a-z0-9_,.]*?)\s+=\s+([a-z][a-z0-9_,.]*)\s+?)*(?:GROUP\sBY\s+?([a-z][a-z0-9_,.()*]+)\s*)?(?:ORDER\sBY\s+?([a-z][a-z0-9_,.]*)\s*?)?/i; | |
| var query = 'SELECT bills.vendor.name, bills.person.first_name FROM bills JOIN persons ON bills.person=person.id JOIN vendors ON bills.vendor=vendors.id GROUP BY count(*) ORDER BY bill.id'; | |
| function updateQuery(query) { | |
| console.log(query.match(re)) | |
| document.getElementById('result').value = new BuildMongoQuery(query) | |
| } | |
| document.getElementById('source').value = query | |
| document.getElementById('result').value = new BuildMongoQuery(query); | |
| function BuildMongoQuery(query) { | |
| this.query = query; | |
| this.tokens = []; | |
| this.mongoQuery = []; | |
| this.selects = {}; | |
| this.from = ''; | |
| var tokens = [ | |
| 'SELECT', | |
| 'FROM', | |
| 'JOIN', | |
| 'WHERE', | |
| 'GROUP BY', | |
| 'ORDER BY' | |
| ] | |
| this.build = function() { | |
| if(!this.query) | |
| return new Error('query is required'); | |
| this.parts = []; | |
| this.parseSql(); | |
| //return this.addJoins().addSelect(this.parts[1]).From(this.parts[2]).addGroupBy(this.parts[3]).toString(); | |
| } | |
| this.parseSql = function() { | |
| var re = /[A-Za-z_.]+\(.*?\)+|\(.*?\)+|"(?:[^"]|\"|"")*"+|'[^'](?:|\'|'')*'+|`(?:[^`]|``)*`+|[^ ,]+|,/ig | |
| this.tokens = this.query.match(re); | |
| console.log("Tokens", this.tokens) | |
| this.getSelectFromQuery(); | |
| var afterFromIndex = this.tokens.indexOf("FROM") +1; | |
| var untilFromLength = (this.tokens.indexOf("JOIN") != -1 ? this.tokens.indexOf("JOIN") : this.tokens.indexOf("WHERE")) - afterFromIndex; | |
| this.addFrom(this.tokens.splice(afterFromIndex, untilFromLength).pop()) | |
| var afterJoinIndex = this.tokens.indexOf("JOIN")+1; | |
| var untilJoinLength = (this.tokens.indexOf("WHERE") != -1 ? this.tokens.indexOf("WHERE") : this.tokens.indexOf("GROUP")) - afterJoinIndex; | |
| this.addJoins(this.tokens.splice(afterJoinIndex, untilJoinLength)) | |
| } | |
| this.addGroupBy = function(group_by) { | |
| // TODO: $group statement build | |
| console.log("Group by: ", group_by) | |
| return this; | |
| } | |
| this.getSelectFromQuery = function() { | |
| var afterSelectIndex = this.tokens.indexOf("SELECT") +1; | |
| var untilSelectsLength = this.tokens.indexOf("FROM") - afterSelectIndex; | |
| this.addSelect(this.tokens.splice(afterSelectIndex, untilSelectsLength).filter(function(select){ return select != ","})); | |
| } | |
| this.addSelect = function(selected_attributes) { | |
| this.selects = selected_attributes; | |
| // TODO: $project statement build | |
| console.log("Selected attributes: ", selected_attributes) | |
| return this; | |
| } | |
| this.addFrom = function(from_table) { | |
| console.log("From table: ", from_table) | |
| this.from = from_table; | |
| return this; | |
| } | |
| this.addWhere = function(where_query) { | |
| this.selects = selected_attributes; | |
| // TODO: $project statement build | |
| console.log("Selected attributes: ", selected_attributes) | |
| return this; | |
| } | |
| this.addJoins = function(joins) { | |
| console.log("With joins: ", joins); | |
| joins = joins.reduce(function(acc, item) { | |
| if(item == "JOIN") { | |
| acc.push([]) | |
| } | |
| else { | |
| if(item == "ON") | |
| return acc; | |
| var lastIdx = acc.length > 0 ? acc.length -1 : 0; | |
| acc[lastIdx] = acc[lastIdx] || []; | |
| acc[lastIdx].push(item) | |
| } | |
| return acc; | |
| },[]).map((join)=>{ | |
| table_name = join[0]; | |
| attrs = join[1].split("=") | |
| attrs = attrs.reduce((acc, attr) => { | |
| if(this.from && attr.indexOf(this.from) != -1) | |
| acc.localField= attr.split(".").pop(); | |
| else | |
| acc.foreignField= attr.split(".").pop(); | |
| return acc; | |
| },{}) | |
| this.mongoQuery.push({ | |
| $lookup: { | |
| "from" : table_name, | |
| "localField" : attrs.localField, | |
| "foreignField" : attrs.foreignField, | |
| "as" : attrs.localField | |
| } | |
| }) | |
| this.mongoQuery.push( { | |
| $unwind: "$"+attrs.localField | |
| }); | |
| }) | |
| return this; | |
| } | |
| function getLastIndexBeforeNextToken(currentIndex) { | |
| } | |
| this.toString = function() { | |
| return "db.getCollection('"+this.from+"').aggregate(\n"+JSON.stringify(this.mongoQuery,null, 2)+"\n);" | |
| } | |
| return this.build(); | |
| } |
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