|
| 1 | +package function |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "staticbackend/db" |
| 6 | + "staticbackend/internal" |
| 7 | + |
| 8 | + "github.com/dop251/goja" |
| 9 | + "go.mongodb.org/mongo-driver/bson/primitive" |
| 10 | + "go.mongodb.org/mongo-driver/mongo" |
| 11 | +) |
| 12 | + |
| 13 | +type ExecutionEnvironment struct { |
| 14 | + Auth internal.Auth |
| 15 | + DB *mongo.Database |
| 16 | + Base *db.Base |
| 17 | +} |
| 18 | + |
| 19 | +type Result struct { |
| 20 | + OK bool `json:"ok"` |
| 21 | + Content interface{} `json:"content"` |
| 22 | +} |
| 23 | + |
| 24 | +func (env *ExecutionEnvironment) Execute() error { |
| 25 | + vm := goja.New() |
| 26 | + vm.SetFieldNameMapper(goja.TagFieldNameMapper("json", true)) |
| 27 | + |
| 28 | + env.addHelpers(vm) |
| 29 | + env.addDatabaseFunctions(vm) |
| 30 | + |
| 31 | + result, err := vm.RunString(` |
| 32 | + log("works here"); |
| 33 | + function handle() { |
| 34 | + var o = { |
| 35 | + desc: "yep", |
| 36 | + done: false, |
| 37 | + subobj: { |
| 38 | + yep: "working", |
| 39 | + status: true |
| 40 | + } |
| 41 | + }; |
| 42 | + var result = create("jsexec", o); |
| 43 | + log(result); |
| 44 | + if (!result.ok) { |
| 45 | + log("ERROR"); |
| 46 | + log(result.content); |
| 47 | + return; |
| 48 | + } |
| 49 | + var result = get("jsexec", result.content.id) |
| 50 | + log("result.ok", result.ok); |
| 51 | + log("result.content", result.content) |
| 52 | + }`) |
| 53 | + |
| 54 | + if err != nil { |
| 55 | + return err |
| 56 | + } |
| 57 | + |
| 58 | + handler, ok := goja.AssertFunction(vm.Get("handle")) |
| 59 | + if !ok { |
| 60 | + return fmt.Errorf(`unable to find function "handle": %v`, err) |
| 61 | + } |
| 62 | + |
| 63 | + resp, err := handler(goja.Undefined()) |
| 64 | + if err != nil { |
| 65 | + return fmt.Errorf("error executing your function: %v", err) |
| 66 | + } |
| 67 | + |
| 68 | + fmt.Println("resp", resp) |
| 69 | + fmt.Println("result", result) |
| 70 | + return nil |
| 71 | +} |
| 72 | + |
| 73 | +func (env *ExecutionEnvironment) addHelpers(vm *goja.Runtime) { |
| 74 | + vm.Set("log", func(call goja.FunctionCall) goja.Value { |
| 75 | + if len(call.Arguments) == 0 { |
| 76 | + return goja.Undefined() |
| 77 | + } |
| 78 | + |
| 79 | + var params []interface{} |
| 80 | + for _, v := range call.Arguments { |
| 81 | + params = append(params, v.Export()) |
| 82 | + } |
| 83 | + fmt.Println(params...) |
| 84 | + return goja.Undefined() |
| 85 | + }) |
| 86 | +} |
| 87 | + |
| 88 | +func (env *ExecutionEnvironment) addDatabaseFunctions(vm *goja.Runtime) { |
| 89 | + vm.Set("create", func(call goja.FunctionCall) goja.Value { |
| 90 | + if len(call.Arguments) != 2 { |
| 91 | + return vm.ToValue(Result{Content: "argument missmatch: you need 2 arguments for create(col, doc"}) |
| 92 | + } |
| 93 | + var col string |
| 94 | + if err := vm.ExportTo(call.Argument(0), &col); err != nil { |
| 95 | + return vm.ToValue(Result{Content: "the first argument should be a string"}) |
| 96 | + } |
| 97 | + doc := make(map[string]interface{}) |
| 98 | + if err := vm.ExportTo(call.Argument(1), &doc); err != nil { |
| 99 | + return vm.ToValue(Result{Content: "the second argument should be an object"}) |
| 100 | + } |
| 101 | + |
| 102 | + doc, err := env.Base.Add(env.Auth, env.DB, col, doc) |
| 103 | + if err != nil { |
| 104 | + return vm.ToValue(Result{Content: fmt.Sprintf("error calling create(): %s", err.Error())}) |
| 105 | + } |
| 106 | + |
| 107 | + if err := env.clean(doc); err != nil { |
| 108 | + return vm.ToValue(Result{Content: err.Error()}) |
| 109 | + } |
| 110 | + return vm.ToValue(Result{OK: true, Content: doc}) |
| 111 | + }) |
| 112 | + vm.Set("get", func(call goja.FunctionCall) goja.Value { |
| 113 | + if len(call.Arguments) != 2 { |
| 114 | + return vm.ToValue(Result{Content: "argument missmatch: you need 2 arguments for get(repo, id)"}) |
| 115 | + } |
| 116 | + var col, id string |
| 117 | + if err := vm.ExportTo(call.Argument(0), &col); err != nil { |
| 118 | + return vm.ToValue(Result{Content: "the first argument should be a string"}) |
| 119 | + } |
| 120 | + if err := vm.ExportTo(call.Argument(1), &id); err != nil { |
| 121 | + return vm.ToValue(Result{Content: "the second argument should be a string"}) |
| 122 | + } |
| 123 | + |
| 124 | + doc, err := env.Base.GetByID(env.Auth, env.DB, col, id) |
| 125 | + if err != nil { |
| 126 | + return vm.ToValue(Result{Content: fmt.Sprintf("error calling get(): %s", err.Error())}) |
| 127 | + } |
| 128 | + |
| 129 | + if err := env.clean(doc); err != nil { |
| 130 | + return vm.ToValue(Result{Content: err.Error()}) |
| 131 | + } |
| 132 | + |
| 133 | + return vm.ToValue(Result{OK: true, Content: doc}) |
| 134 | + }) |
| 135 | +} |
| 136 | + |
| 137 | +func (*ExecutionEnvironment) clean(doc map[string]interface{}) error { |
| 138 | + if id, ok := doc["id"]; ok { |
| 139 | + oid, ok := id.(primitive.ObjectID) |
| 140 | + if !ok { |
| 141 | + return fmt.Errorf("unable to cast document id") |
| 142 | + } |
| 143 | + doc["id"] = oid.Hex() |
| 144 | + } |
| 145 | + |
| 146 | + if id, ok := doc[internal.FieldAccountID]; ok { |
| 147 | + oid, ok := id.(primitive.ObjectID) |
| 148 | + if !ok { |
| 149 | + return fmt.Errorf("unable to cast document accountId") |
| 150 | + } |
| 151 | + doc[internal.FieldAccountID] = oid.Hex() |
| 152 | + } |
| 153 | + |
| 154 | + return nil |
| 155 | +} |
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