From 8361ecd246ae1469abe2adb502fab9305a0ad15c Mon Sep 17 00:00:00 2001
From: Daniel Banck <daniel@dbanck.de>
Date: Wed, 15 Feb 2023 14:44:54 +0100
Subject: [PATCH] Add Terraform 1.3 functions

---
 internal/funcs/1.3/functions.go | 59 +++++++++++++++++++++++++++++++++
 schema/functions.go             |  4 +++
 2 files changed, 63 insertions(+)
 create mode 100644 internal/funcs/1.3/functions.go

diff --git a/internal/funcs/1.3/functions.go b/internal/funcs/1.3/functions.go
new file mode 100644
index 00000000..c3aac59f
--- /dev/null
+++ b/internal/funcs/1.3/functions.go
@@ -0,0 +1,59 @@
+package funcs
+
+import (
+	"github.com/hashicorp/go-version"
+	"github.com/hashicorp/hcl-lang/schema"
+	"github.com/zclconf/go-cty/cty"
+	"github.com/zclconf/go-cty/cty/function"
+
+	funcs_v0_15 "github.com/hashicorp/terraform-schema/internal/funcs/0.15"
+)
+
+func Functions(v *version.Version) map[string]schema.FunctionSignature {
+	f := funcs_v0_15.Functions(v)
+
+	f["endswith"] = schema.FunctionSignature{
+		Params: []function.Parameter{
+			{
+				Name: "str",
+				Type: cty.String,
+			},
+			{
+				Name: "suffix",
+				Type: cty.String,
+			},
+		},
+		ReturnType:  cty.Bool,
+		Description: "`endswith` takes two values: a string to check and a suffix string. The function returns true if the first string ends with that exact suffix.",
+	}
+	f["startswith"] = schema.FunctionSignature{
+		Params: []function.Parameter{
+			{
+				Name: "str",
+				Type: cty.String,
+			},
+			{
+				Name: "prefix",
+				Type: cty.String,
+			},
+		},
+		ReturnType:  cty.Bool,
+		Description: "`startswith` takes two values: a string to check and a prefix string. The function returns true if the string begins with that exact prefix.",
+	}
+	f["timecmp"] = schema.FunctionSignature{
+		Params: []function.Parameter{
+			{
+				Name: "timestamp_a",
+				Type: cty.String,
+			},
+			{
+				Name: "timestamp_b",
+				Type: cty.String,
+			},
+		},
+		ReturnType:  cty.Number,
+		Description: "`timecmp` compares two timestamps and returns a number that represents the ordering of the instants those timestamps represent.",
+	}
+
+	return f
+}
diff --git a/schema/functions.go b/schema/functions.go
index daf7e58b..c5655766 100644
--- a/schema/functions.go
+++ b/schema/functions.go
@@ -10,6 +10,7 @@ import (
 	funcs_v0_13 "github.com/hashicorp/terraform-schema/internal/funcs/0.13"
 	funcs_v0_14 "github.com/hashicorp/terraform-schema/internal/funcs/0.14"
 	funcs_v0_15 "github.com/hashicorp/terraform-schema/internal/funcs/0.15"
+	funcs_v1_3 "github.com/hashicorp/terraform-schema/internal/funcs/1.3"
 )
 
 func FunctionsForVersion(v *version.Version) (map[string]schema.FunctionSignature, error) {
@@ -18,6 +19,9 @@ func FunctionsForVersion(v *version.Version) (map[string]schema.FunctionSignatur
 		return nil, fmt.Errorf("invalid version: %w", err)
 	}
 
+	if ver.GreaterThanOrEqual(v1_3) {
+		return funcs_v1_3.Functions(ver), nil
+	}
 	if ver.GreaterThanOrEqual(v0_15) {
 		return funcs_v0_15.Functions(ver), nil
 	}