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Support for @index @FIRST @last @root @global @key and "../" parents …
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…access in JS helpers

Fixes nolimits4web#24
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@nolimits4web
nolimits4web committed Aug 2, 2017
1 parent 42afe86 commit da64f7e
Showing 1 changed file with 92 additions and 11 deletions.
103 changes: 92 additions & 11 deletions src/template7.js
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Original file line number Diff line number Diff line change
Expand Up @@ -187,6 +187,36 @@ function stringToBlocks(string) {
}
return blocks;
}
function parseJsVariable(expression, replace, object) {
return expression.split(/([+ -*/^])/g).map((part) => {
if (part.indexOf(replace) < 0) return part;
if (!object) return JSON.stringify('');
let variable = object;
if (part.indexOf(`${replace}.`) >= 0) {
part.split(`${replace}.`)[1].split('.').forEach((partName) => {
if (variable[partName]) variable = variable[partName];
else variable = 'undefined';
});
}
return JSON.stringify(variable);
}).join('');
}
function parseJsParents(expression, parents) {
return expression.split(/([+ -*^])/g).map((part) => {
if (part.indexOf('../') < 0) return part;
if (!parents || parents.length === 0) return JSON.stringify('');
const levelsUp = part.split('../').length - 1;
const parentData = levelsUp > parents.length ? parents[parents.length - 1] : parents[levelsUp - 1];

let variable = parentData;
const parentPart = part.replace(/..\//g, '');
parentPart.split('.').forEach((partName) => {
if (variable[partName]) variable = variable[partName];
else variable = 'undefined';
});
return JSON.stringify(variable);
}).join('');
}
class Template7 {
constructor(template) {
const t = this;
Expand Down Expand Up @@ -290,19 +320,29 @@ class Template7 {
}
// Helpers block
if (block.type === 'helper') {
let parents;
if (ctx !== 'ctx_1') {
const level = ctx.split('_')[1];
let parentsString = `ctx_${level - 1}`;
for (let j = level - 2; j >= 1; j -= 1) {
parentsString += `, ctx_${j}`;
}
parents = `[${parentsString}]`;
} else {
parents = `[${ctx}]`;
}
if (block.helperName in t.helpers) {
compiledArguments = getCompiledArguments(block.contextName, ctx);

resultString += `r += (Template7.helpers.${block.helperName}).call(${ctx}, ${compiledArguments && (`${compiledArguments}, `)}{hash:${JSON.stringify(block.hash)}, data: data || {}, fn: ${getCompileFn(block, depth + 1)}, inverse: ${getCompileInverse(block, depth + 1)}, root: root});`;
resultString += `r += (Template7.helpers.${block.helperName}).call(${ctx}, ${compiledArguments && (`${compiledArguments}, `)}{hash:${JSON.stringify(block.hash)}, data: data || {}, fn: ${getCompileFn(block, depth + 1)}, inverse: ${getCompileInverse(block, depth + 1)}, root: root, parents: ${parents}});`;
} else if (block.contextName.length > 0) {
throw new Error(`Template7: Missing helper: "${block.helperName}"`);
} else {
variable = getCompileVar(block.helperName, ctx);
resultString += `if (${variable}) {`;
resultString += `if (isArray(${variable})) {`;
resultString += `r += (Template7.helpers.each).call(${ctx}, ${variable}, {hash:${JSON.stringify(block.hash)}, data: data || {}, fn: ${getCompileFn(block, depth + 1)}, inverse: ${getCompileInverse(block, depth + 1)}, root: root});`;
resultString += `r += (Template7.helpers.each).call(${ctx}, ${variable}, {hash:${JSON.stringify(block.hash)}, data: data || {}, fn: ${getCompileFn(block, depth + 1)}, inverse: ${getCompileInverse(block, depth + 1)}, root: root, parents: ${parents}});`;
resultString += '}else {';
resultString += `r += (Template7.helpers.with).call(${ctx}, ${variable}, {hash:${JSON.stringify(block.hash)}, data: data || {}, fn: ${getCompileFn(block, depth + 1)}, inverse: ${getCompileInverse(block, depth + 1)}, root: root});`;
resultString += `r += (Template7.helpers.with).call(${ctx}, ${variable}, {hash:${JSON.stringify(block.hash)}, data: data || {}, fn: ${getCompileFn(block, depth + 1)}, inverse: ${getCompileInverse(block, depth + 1)}, root: root, parents: ${parents}});`;
resultString += '}}';
}
}
Expand Down Expand Up @@ -394,20 +434,60 @@ Template7.prototype = {
return ctx.join(options.hash.delimiter || options.hash.delimeter);
},
js(expression, options) {
const data = options.data;
let func;
if (expression.indexOf('return') >= 0) {
func = `(function(){${expression}})`;
let execute = expression;
('index first last key').split(' ').forEach((prop) => {
if (typeof data[prop] !== 'undefined') {
const re1 = new RegExp(`this.@${prop}`, 'g');
const re2 = new RegExp(`@${prop}`, 'g');
execute = execute
.replace(re1, JSON.stringify(data[prop]))
.replace(re2, JSON.stringify(data[prop]));
}
});
if (options.root && execute.indexOf('@root') >= 0) {
execute = parseJsVariable(execute, '@root', options.root);
}
if (execute.indexOf('@global') >= 0) {
execute = parseJsVariable(execute, '@global', template7Context.Template7.global);
}
if (execute.indexOf('../') >= 0) {
execute = parseJsParents(execute, options.parents);
}
if (execute.indexOf('return') >= 0) {
func = `(function(){${execute}})`;
} else {
func = `(function(){return (${expression})})`;
func = `(function(){return (${execute})})`;
}
return eval.call(this, func).call(this);
},
js_compare(expression, options) {
js_if(expression, options) {
const data = options.data;
let func;
if (expression.indexOf('return') >= 0) {
func = `(function(){${expression}})`;
let execute = expression;
('index first last key').split(' ').forEach((prop) => {
if (typeof data[prop] !== 'undefined') {
const re1 = new RegExp(`this.@${prop}`, 'g');
const re2 = new RegExp(`@${prop}`, 'g');
execute = execute
.replace(re1, JSON.stringify(data[prop]))
.replace(re2, JSON.stringify(data[prop]));
}
});
if (options.root && execute.indexOf('@root') >= 0) {
execute = parseJsVariable(execute, '@root', options.root);
}
if (execute.indexOf('@global') >= 0) {
execute = parseJsVariable(execute, '@global', Template7.global);
}
if (execute.indexOf('../') >= 0) {
execute = parseJsParents(execute, options.parents);
}
if (execute.indexOf('return') >= 0) {
func = `(function(){${execute}})`;
} else {
func = `(function(){return (${expression})})`;
func = `(function(){return (${execute})})`;
}
const condition = eval.call(this, func).call(this);
if (condition) {
Expand All @@ -418,6 +498,7 @@ Template7.prototype = {
},
},
};
Template7.prototype.helpers.js_compare = Template7.prototype.helpers.js_if;
function t7(template, data) {
if (arguments.length === 2) {
let instance = new Template7(template);
Expand Down

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