feat: generate fully indented, beautiful code

src/emitters/emitter.ts

@@ -21,7 +21,15 @@ export abstract class Emitter {
     public writeNewLine () {
         this.write('\n')
     }
-    public writeLine (str) {
+    public nextLine (str: string) {
+        this.writeIndent()
+        this.write(str)
+    }
+    public feedLine (str: string) {
+        this.write(str)
+        this.writeNewLine()
+    }
+    public writeLine (str: string) {
         this.writeIndent()
         this.write(str)
         this.writeNewLine()

src/emitters/php-emitter.ts

@@ -47,12 +47,78 @@ export class PHPEmitter extends Emitter {
         this.writeHTML(ExpressionEmitter.stringLiteralize(buffer))
     }
 
-    public beginIf (expr) {
-        this.writeLine(`if (${expr}) {`)
+    /**
+     * function
+     */
+    public writeFunction (name = '', args = [], use = [], body: Function = () => null) {
+        const nameStr = name ? `${name} ` : ''
+        const argsStr = args.join(', ')
+        const useStr = use.length ? `use (${use.join(', ')}) ` : ''
+        this.write(`function ${nameStr}(${argsStr}) ${useStr}{`)
+        this.writeNewLine()
         this.indent()
+        body()
+        this.unindent()
+        this.writeIndent()
+        this.write('}')
+    }
+    public writeAnonymousFunction (args = [], use = [], body: Function = () => null) {
+        this.writeFunction('', args, use, body)
+    }
+    public writeFunctionCall (name: string, args: string[]) {
+        this.write(`${name}(${args.join(', ')})`)
     }
 
+    /**
+     * if
+     */
+    public writeIf (expr: string, cb: Function) {
+        this.beginIf(expr)
+        cb()
+        this.endIf()
+    }
+    public beginIf (expr: string) {
+        this.beginBlock(`if (${expr})`)
+    }
+    public beginElseIf (expr: string) {
+        this.beginBlock(`else if (${expr})`)
+    }
+    public beginElse () {
+        this.beginBlock(`else`)
+    }
     public endIf () {
+        this.endBlock()
+    }
+
+    /**
+     * foreach
+     */
+
+    public writeForeach (expr: string, cb: Function) {
+        this.beginForeach(expr)
+        cb()
+        this.endForeach()
+    }
+    public beginForeach (expr: string) {
+        this.beginBlock(`foreach (${expr})`)
+    }
+    public endForeach () {
+        this.endBlock()
+    }
+
+    /**
+     * block
+     */
+    public writeBlock (expr: string, cb: Function) {
+        this.beginBlock(expr)
+        cb()
+        this.endBlock()
+    }
+    public beginBlock (expr: string) {
+        this.writeLine(`${expr} {`)
+        this.indent()
+    }
+    public endBlock () {
         this.unindent()
         this.writeLine(`}`)
     }