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Finished refactoring, it still dumps everything

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This commit is contained in:
Kayne Ruse
2020-09-05 02:12:36 +10:00
parent 7fa4c56bcc
commit d52b63bcf4
3 changed files with 33 additions and 25 deletions
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50
server/simpleQL/index.js
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@@ -1,5 +1,5 @@
//reserved keywords that can't be used as identifiers
const keywords = ['type', 'scalar'];
const keywords = ['type', 'scalar', 'create', 'update', 'delete', 'set', 'match'];
//the main function to be returned
const main = (schema, handler) => {
@@ -146,42 +146,46 @@ const parseCompoundType = (tokens, pos) => {
};
const parseQuery = async (handler, tokens, pos, typeGraph, parent = null) => {
//returns an object result from handler
//returns an object result from handler for all custom types
//get the "parent object" contents for sub-objects
// const queryName = typeGraph[tokens[pos]] ? null : tokens[pos]; //if you're a type, name = null
// const queryType = typeGraph[tokens[pos]] ? tokens[pos] : typeGraph[parent.typeName][tokens[pos]].typeName; //use this type or derive the type from the parent
//determine this type
let queryType;
if (typeGraph[tokens[pos]] && typeGraph[tokens[pos]].scalar) {
queryType = tokens[pos];
}
else if (parent && typeGraph[parent.typeName][tokens[pos]]) {
queryType = typeGraph[parent.typeName][tokens[pos]].typeName;
} else {
queryType = tokens[pos];
}
//move on
pos++;
//the opening brace
if (tokens[pos++] != '{') {
throw 'Expected \'{\' in query, found ' + tokens[pos - 1];
throw 'Expected \'{\' after queried type';
}
//the scalars to pass to the handler
const scalarFields = [];
const deferredCalls = []; //functions (promises) that will be called at the end of this function
while(tokens[pos] != '}') { //while not at the end of this block
//not the end of the query
if (!tokens[pos]) {
throw 'Expected field in query, got end';
}
while(tokens[pos] && tokens[pos] != '}') { //while not at the end of this block
//prevent using keywords
if (['create', 'update', 'delete', 'set', 'match'].includes(tokens[pos])) {
if (keywords.includes(tokens[pos])) {
throw 'Unexpected keyword ' + tokens[pos];
}
//type is a scalar, and can be queried
if (typeGraph[typeGraph[tokens[pos]].typeName].scalar) {
if (typeGraph[queryType] && typeGraph[queryType][tokens[pos]] && typeGraph[typeGraph[queryType][tokens[pos]].typeName].scalar) {
//push the scalar object to the queryFields
scalarFields.push({ typeName: typeGraph[tokens[pos]].typeName, name: tokens[pos] });
scalarFields.push({ typeName: typeGraph[queryType][tokens[pos]].typeName, name: tokens[pos] });
pos++;
} else {
}
else if (typeGraph[queryType] && typeGraph[queryType][tokens[pos]] && !typeGraph[typeGraph[queryType][tokens[pos]].typeName].scalar) {
const pos2 = pos; //cache the value to keep it from changing
//recurse
@@ -190,10 +194,14 @@ const parseQuery = async (handler, tokens, pos, typeGraph, parent = null) => {
tokens,
pos2,
typeGraph,
{ typeName: queryType, scalars: scalarFields } //parent object
{ typeName: queryType, scalars: scalarFields, context: result } //parent object
)]);
pos = eatBlock(tokens, pos);
pos = eatBlock(tokens, pos + 2);
} else {
//token is something else?
console.log('something else: ', tokens[pos], pos);
pos++;
}
}
@@ -202,7 +210,7 @@ const parseQuery = async (handler, tokens, pos, typeGraph, parent = null) => {
let results = handler[queryType](parent, scalarFields);
//WTF
//WTF: related to the recusion above
results = await Promise.all(results.map(async res => {
const tuples = await Promise.all(deferredCalls.map(async call => await call(res)));
@@ -230,7 +238,7 @@ const eatBlock = (tokens, pos) => {
}
}
return ++pos;
return ++pos; //eat the final '}'
};
//return