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{"version":3,"names":["gatherSequenceExpressions","nodes","scope","declars","exprs","ensureLastUndefined","node","isEmptyStatement","isExpression","push","isExpressionStatement","expression","isVariableDeclaration","kind","declar","declarations","bindings","getBindingIdentifiers","key","Object","keys","id","cloneNode","init","assignmentExpression","isIfStatement","consequent","buildUndefinedNode","alternate","conditionalExpression","test","isBlockStatement","body","indexOf","length","sequenceExpression"],"sources":["../../src/converters/gatherSequenceExpressions.ts"],"sourcesContent":["import getBindingIdentifiers from \"../retrievers/getBindingIdentifiers\";\nimport {\n isExpression,\n isExpressionStatement,\n isVariableDeclaration,\n isIfStatement,\n isBlockStatement,\n isEmptyStatement,\n} from \"../validators/generated\";\nimport {\n sequenceExpression,\n assignmentExpression,\n conditionalExpression,\n} from \"../builders/generated\";\nimport cloneNode from \"../clone/cloneNode\";\nimport type * as t from \"..\";\nimport type { Scope } from \"@babel/traverse\";\n\nexport type DeclarationInfo = {\n kind: t.VariableDeclaration[\"kind\"];\n id: t.Identifier;\n};\n\nexport default function gatherSequenceExpressions(\n nodes: ReadonlyArray<t.Node>,\n scope: Scope,\n declars: Array<DeclarationInfo>,\n) {\n const exprs: t.Expression[] = [];\n let ensureLastUndefined = true;\n\n for (const node of nodes) {\n // if we encounter emptyStatement before a non-emptyStatement\n // we want to disregard that\n if (!isEmptyStatement(node)) {\n ensureLastUndefined = false;\n }\n\n if (isExpression(node)) {\n exprs.push(node);\n } else if (isExpressionStatement(node)) {\n exprs.push(node.expression);\n } else if (isVariableDeclaration(node)) {\n if (node.kind !== \"var\") return; // bailed\n\n for (const declar of node.declarations) {\n const bindings = getBindingIdentifiers(declar);\n for (const key of Object.keys(bindings)) {\n declars.push({\n kind: node.kind,\n id: cloneNode(bindings[key]),\n });\n }\n\n if (declar.init) {\n exprs.push(assignmentExpression(\"=\", declar.id, declar.init));\n }\n }\n\n ensureLastUndefined = true;\n } else if (isIfStatement(node)) {\n const consequent = node.consequent\n ? gatherSequenceExpressions([node.consequent], scope, declars)\n : scope.buildUndefinedNode();\n const alternate = node.alternate\n ? gatherSequenceExpressions([node.alternate], scope, declars)\n : scope.buildUndefinedNode();\n if (!consequent || !alternate) return; // bailed\n\n exprs.push(conditionalExpression(node.test, consequent, alternate));\n } else if (isBlockStatement(node)) {\n const body = gatherSequenceExpressions(node.body, scope, declars);\n if (!body) return; // bailed\n\n exprs.push(body);\n } else if (isEmptyStatement(node)) {\n // empty statement so ensure the last item is undefined if we're last\n // checks if emptyStatement is first\n if (nodes.indexOf(node) === 0) {\n ensureLastUndefined = true;\n }\n } else {\n // bailed, we can't turn this statement into an expression\n return;\n }\n }\n\n if (ensureLastUndefined) {\n exprs.push(scope.buildUndefinedNode());\n }\n\n if (exprs.length === 1) {\n return exprs[0];\n } else {\n return sequenceExpression(exprs);\n }\n}\n"],"mappings":";;;;;;;AAAA;;AACA;;AAQA;;AAKA;;AASe,SAASA,yBAAT,CACbC,KADa,EAEbC,KAFa,EAGbC,OAHa,EAIb;EACA,MAAMC,KAAqB,GAAG,EAA9B;EACA,IAAIC,mBAAmB,GAAG,IAA1B;;EAEA,KAAK,MAAMC,IAAX,IAAmBL,KAAnB,EAA0B;IAGxB,IAAI,CAAC,IAAAM,2BAAA,EAAiBD,IAAjB,CAAL,EAA6B;MAC3BD,mBAAmB,GAAG,KAAtB;IACD;;IAED,IAAI,IAAAG,uBAAA,EAAaF,IAAb,CAAJ,EAAwB;MACtBF,KAAK,CAACK,IAAN,CAAWH,IAAX;IACD,CAFD,MAEO,IAAI,IAAAI,gCAAA,EAAsBJ,IAAtB,CAAJ,EAAiC;MACtCF,KAAK,CAACK,IAAN,CAAWH,IAAI,CAACK,UAAhB;IACD,CAFM,MAEA,IAAI,IAAAC,gCAAA,EAAsBN,IAAtB,CAAJ,EAAiC;MACtC,IAAIA,IAAI,CAACO,IAAL,KAAc,KAAlB,EAAyB;;MAEzB,KAAK,MAAMC,MAAX,IAAqBR,IAAI,CAACS,YAA1B,EAAwC;QACtC,MAAMC,QAAQ,GAAG,IAAAC,8BAAA,EAAsBH,MAAtB,CAAjB;;QACA,KAAK,MAAMI,GAAX,IAAkBC,MAAM,CAACC,IAAP,CAAYJ,QAAZ,CAAlB,EAAyC;UACvCb,OAAO,CAACM,IAAR,CAAa;YACXI,IAAI,EAAEP,IAAI,CAACO,IADA;YAEXQ,EAAE,EAAE,IAAAC,kBAAA,EAAUN,QAAQ,CAACE,GAAD,CAAlB;UAFO,CAAb;QAID;;QAED,IAAIJ,MAAM,CAACS,IAAX,EAAiB;UACfnB,KAAK,CAACK,IAAN,CAAW,IAAAe,gCAAA,EAAqB,GAArB,EAA0BV,MAAM,CAACO,EAAjC,EAAqCP,MAAM,CAACS,IAA5C,CAAX;QACD;MACF;;MAEDlB,mBAAmB,GAAG,IAAtB;IACD,CAlBM,MAkBA,IAAI,IAAAoB,wBAAA,EAAcnB,IAAd,CAAJ,EAAyB;MAC9B,MAAMoB,UAAU,GAAGpB,IAAI,CAACoB,UAAL,GACf1B,yBAAyB,CAAC,CAACM,IAAI,CAACoB,UAAN,CAAD,EAAoBxB,KAApB,EAA2BC,OAA3B,CADV,GAEfD,KAAK,CAACyB,kBAAN,EAFJ;MAGA,MAAMC,SAAS,GAAGtB,IAAI,CAACsB,SAAL,GACd5B,yBAAyB,CAAC,CAACM,IAAI,CAACsB,SAAN,CAAD,EAAmB1B,KAAnB,EAA0BC,OAA1B,CADX,GAEdD,KAAK,CAACyB,kBAAN,EAFJ;MAGA,IAAI,CAACD,UAAD,IAAe,CAACE,SAApB,EAA+B;MAE/BxB,KAAK,CAACK,IAAN,CAAW,IAAAoB,iCAAA,EAAsBvB,IAAI,CAACwB,IAA3B,EAAiCJ,UAAjC,EAA6CE,SAA7C,CAAX;IACD,CAVM,MAUA,IAAI,IAAAG,2BAAA,EAAiBzB,IAAjB,CAAJ,EAA4B;MACjC,MAAM0B,IAAI,GAAGhC,yBAAyB,CAACM,IAAI,CAAC0B,IAAN,EAAY9B,KAAZ,EAAmBC,OAAnB,CAAtC;MACA,IAAI,CAAC6B,IAAL,EAAW;MAEX5B,KAAK,CAACK,IAAN,CAAWuB,IAAX;IACD,CALM,MAKA,IAAI,IAAAzB,2BAAA,EAAiBD,IAAjB,CAAJ,EAA4B;MAGjC,IAAIL,KAAK,CAACgC,OAAN,CAAc3B,IAAd,MAAwB,CAA5B,EAA+B;QAC7BD,mBAAmB,GAAG,IAAtB;MACD;IACF,CANM,MAMA;MAEL;IACD;EACF;;EAED,IAAIA,mBAAJ,EAAyB;IACvBD,KAAK,CAACK,IAAN,CAAWP,KAAK,CAACyB,kBAAN,EAAX;EACD;;EAED,IAAIvB,KAAK,CAAC8B,MAAN,KAAiB,CAArB,EAAwB;IACtB,OAAO9B,KAAK,CAAC,CAAD,CAAZ;EACD,CAFD,MAEO;IACL,OAAO,IAAA+B,8BAAA,EAAmB/B,KAAnB,CAAP;EACD;AACF"}
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