GraphConnector initialization (#104)

* Issue #68: Updates to dependency files.

* Issue #68: Added GraphConnector module and test suite.

* Issue #68: ErrorList module and test added to package to support GraphConnector.

* Issue #68: Updates made to address comments.

* Issue #68: Added additonal comments to structs and corrected library changes.

* Issue #68: Added additonal comments to structs and corrected library changes.

* Issue #68: Updates made to package.

* Update errorList.go

Fix typo

* Issue #68: ErrorList struct removal required
The structure of the errorList is not required for the first
initialization of the GraphConnector. In the case that this structure or
addtional functionality needs to be added in the future, an issue will
be created.

* Issue #68: Simplification and structure change
The errorList has been changed to []errors. Additionally, the
credentials and authentication have been changed to inline. Provided
early exits for creating NewGraphConnectors. Note, adapter objects can
be created with strings that fail authentication. Reduced the amount of logs.

* Issue #68: Prepend
[errors](https://github.com/alcionai/corso/pull/104#discussion_r887268576)
This fixes the bug that identified in the PR.

* Update src/internal/connector/graphConnector.go

Adjustment for styling.

Co-authored-by: Keepers <104464746+ryanfkeepers@users.noreply.github.com>

* Update src/internal/connector/graphConnector_test.go

Issue #68: PR Resolution
Test environmental value changed to be consistent with the rest of the package.

Co-authored-by: Keepers <104464746+ryanfkeepers@users.noreply.github.com>

* Issue #68: Resolving Open Questions from reviewers
Prior to commit, Issue #116. Additionally, the entire error package was
requested to be removed from the component. GraphConnector tests are
preliminary set-up to investigate the Issue #116. The code will be
redacted after the new functionality is verified. Stashing for merge for
the changes from the reviewers.

* Issue #116: Bug fix. Response verified not to be nil prior to using it in next step.

* Issue #116: Added table structure to verify GraphConnector can handle being given an empty set of parameters.

* Issue #68: PR Changes
List of changes:
- Added check to ensure conversion of user object passed
- setTenant not exported
- TODO added user query during initialization
- Iteration flow adjusted for paging.

Co-authored-by: Keepers <104464746+ryanfkeepers@users.noreply.github.com>

src/go.mod

@@ -3,8 +3,13 @@ module github.com/alcionai/corso
 go 1.18
 
 require (
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.0.0
+	github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.0.0
 	github.com/google/uuid v1.3.0
 	github.com/kopia/kopia v0.10.7
+	github.com/microsoft/kiota-authentication-azure-go v0.3.0
+	github.com/microsoftgraph/msgraph-sdk-go v0.25.0
+	github.com/microsoftgraph/msgraph-sdk-go-core v0.26.0
 	github.com/pkg/errors v0.9.1
 	github.com/spf13/cobra v1.4.0
 	github.com/stretchr/testify v1.7.1
@@ -12,11 +17,15 @@ require (
 )
 
 require (
+	github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.0 // indirect
+	github.com/AzureAD/microsoft-authentication-library-for-go v0.4.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/chmduquesne/rollinghash v4.0.0+incompatible // indirect
+	github.com/cjlapao/common-go v0.0.20 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.0 // indirect
+	github.com/golang-jwt/jwt v3.2.1+incompatible // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/hashicorp/golang-lru v0.5.4 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
@@ -24,7 +33,12 @@ require (
 	github.com/klauspost/compress v1.15.1 // indirect
 	github.com/klauspost/cpuid/v2 v2.0.12 // indirect
 	github.com/klauspost/pgzip v1.2.5 // indirect
+	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/microsoft/kiota-abstractions-go v0.8.0 // indirect
+	github.com/microsoft/kiota-http-go v0.5.0 // indirect
+	github.com/microsoft/kiota-serialization-json-go v0.5.1 // indirect
+	github.com/microsoft/kiota-serialization-text-go v0.4.0 // indirect
 	github.com/minio/md5-simd v1.1.2 // indirect
 	github.com/minio/minio-go/v7 v7.0.23 // indirect
 	github.com/minio/sha256-simd v1.0.0 // indirect
@@ -33,6 +47,7 @@ require (
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/natefinch/atomic v1.0.1 // indirect
 	github.com/pierrec/lz4 v2.6.1+incompatible // indirect
+	github.com/pkg/browser v0.0.0-20210115035449-ce105d075bb4 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/client_golang v1.12.1 // indirect
 	github.com/prometheus/client_model v0.2.0 // indirect
@@ -41,13 +56,14 @@ require (
 	github.com/rs/xid v1.3.0 // indirect
 	github.com/sirupsen/logrus v1.8.1 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/yosida95/uritemplate/v3 v3.0.2 // indirect
 	github.com/zeebo/blake3 v0.2.3 // indirect
 	go.uber.org/atomic v1.9.0 // indirect
 	go.uber.org/multierr v1.8.0 // indirect
 	go.uber.org/zap v1.21.0 // indirect
-	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 // indirect
+	golang.org/x/crypto v0.0.0-20220511200225-c6db032c6c88 // indirect
 	golang.org/x/exp v0.0.0-20210916165020-5cb4fee858ee // indirect
-	golang.org/x/net v0.0.0-20220325170049-de3da57026de // indirect
+	golang.org/x/net v0.0.0-20220425223048-2871e0cb64e4 // indirect
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
 	golang.org/x/sys v0.0.0-20220328115105-d36c6a25d886 // indirect
 	golang.org/x/text v0.3.7 // indirect

src/go.sum

@@ -31,6 +31,14 @@ cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohl
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.0.0 h1:sVPhtT2qjO86rTUaWMr4WoES4TkjGnzcioXcnHV9s5k=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.0.0/go.mod h1:uGG2W01BaETf0Ozp+QxxKJdMBNRWPdstHG0Fmdwn1/U=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.0.0 h1:Yoicul8bnVdQrhDMTHxdEckRGX01XvwXDHUT9zYZ3k0=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.0.0/go.mod h1:+6sju8gk8FRmSajX3Oz4G5Gm7P+mbqE9FVaXXFYTkCM=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.0 h1:jp0dGvZ7ZK0mgqnTSClMxa5xuRL7NZgHameVYF6BurY=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.0/go.mod h1:eWRD7oawr1Mu1sLCawqVc0CUiF43ia3qQMxLscsKQ9w=
+github.com/AzureAD/microsoft-authentication-library-for-go v0.4.0 h1:WVsrXCnHlDDX8ls+tootqRE87/hL9S/g4ewig9RsD/c=
+github.com/AzureAD/microsoft-authentication-library-for-go v0.4.0/go.mod h1:Vt9sXTKwMyGcOxSmLDMnGPgqsUg7m8pe215qMLrDXw4=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
@@ -55,6 +63,8 @@ github.com/chmduquesne/rollinghash v4.0.0+incompatible/go.mod h1:Uc2I36RRfTAf7Dg
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/cjlapao/common-go v0.0.20 h1:AIZBtuxwJPXFqyxFOlvVDWZgbsuTSquZEUw4KMx8pNg=
+github.com/cjlapao/common-go v0.0.20/go.mod h1:EVLEXIxsBHblPMrhJYOvL4yBCcBj7IYDdW88VlfxpPM=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
@@ -87,6 +97,8 @@ github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V
 github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
+github.com/golang-jwt/jwt v3.2.1+incompatible h1:73Z+4BJcrTC+KczS6WvTPvRGOp1WmfEP4Q1lOd9Z/+c=
+github.com/golang-jwt/jwt v3.2.1+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
@@ -138,6 +150,7 @@ github.com/google/pprof v0.0.0-20200229191704-1ebb73c60ed3/go.mod h1:ZgVRPoUq/hf
 github.com/google/pprof v0.0.0-20200430221834-fc25d7d30c6d/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
 github.com/google/pprof v0.0.0-20200708004538-1a94d8640e99/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
+github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
@@ -181,8 +194,24 @@ github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORN
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
+github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
+github.com/microsoft/kiota-abstractions-go v0.8.0 h1:mtilyDlfM9EUe4blByCmQh/iO7S0176zHd+oxr7rh20=
+github.com/microsoft/kiota-abstractions-go v0.8.0/go.mod h1:uWv0yQ4lYJtK9NIK5RAmw/LeIMUbIG0asu36v4yjyjY=
+github.com/microsoft/kiota-authentication-azure-go v0.3.0 h1:iLyy5qldAjBiYMGMk1r/rJkcmARA8cKboiN7/XbRxv4=
+github.com/microsoft/kiota-authentication-azure-go v0.3.0/go.mod h1:qyZWSCug2eG1zrRnCSacyFHGsgQa4aSCWn3EOkY9Z1M=
+github.com/microsoft/kiota-http-go v0.5.0 h1:p88Jz3Puk2ycwiLBhO/L7fygje+ACT2qvN2gKHfMSLE=
+github.com/microsoft/kiota-http-go v0.5.0/go.mod h1:k/IlqH/z8MOj8loDUU2Z2tRbqzea9Zd4zC199K/GfMU=
+github.com/microsoft/kiota-serialization-json-go v0.5.1 h1:JX8JnonbmlRMRWEn9IzPTJFvB91ZlcaFc7NbgJC1PGg=
+github.com/microsoft/kiota-serialization-json-go v0.5.1/go.mod h1:AwvSlqR5aZlv95UBUmirv0ccYayg/1x5JSdErLvJKHM=
+github.com/microsoft/kiota-serialization-text-go v0.4.0 h1:jJd5+yjej/KeJtHSMvNNeoIuXtEhiq5p89oRh0v0bW4=
+github.com/microsoft/kiota-serialization-text-go v0.4.0/go.mod h1:jysZ8wwuFHcwI6YhJKVINisrTfQ7VBuly7oiVsd+gHg=
+github.com/microsoftgraph/msgraph-sdk-go v0.25.0 h1:WOORTAcuY42BFuuRPd0jAJmIdtPBfDeHcTFAfoQjPik=
+github.com/microsoftgraph/msgraph-sdk-go v0.25.0/go.mod h1:m5eXsQYiU3oj+iBnluGtoF1Y5ER2YkZ1JIModpFgSJo=
+github.com/microsoftgraph/msgraph-sdk-go-core v0.26.0 h1:cszmmU1gfVLuwqkmVR8m7cEB9GzVbk1bvxSG+BLv8Ew=
+github.com/microsoftgraph/msgraph-sdk-go-core v0.26.0/go.mod h1:foIwVlCGl22BMQohIhfFmOULUNPeN39/SifGjEyEoEs=
 github.com/minio/md5-simd v1.1.2 h1:Gdi1DZK69+ZVMoNHRXJyNcxrMA4dSxoYHZSQbirFg34=
 github.com/minio/md5-simd v1.1.2/go.mod h1:MzdKDxYpY2BT9XQFocsiZf/NKVtR7nkE4RoEpN+20RM=
 github.com/minio/minio-go/v7 v7.0.23 h1:NleyGQvAn9VQMU+YHVrgV4CX+EPtxPt/78lHOOTncy4=
@@ -198,12 +227,15 @@ github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lN
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
+github.com/montanaflynn/stats v0.6.6/go.mod h1:etXPPgVO6n31NxCd9KQUMvCM+ve0ruNzt6R8Bnaayow=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/natefinch/atomic v1.0.1 h1:ZPYKxkqQOx3KZ+RsbnP/YsgvxWQPGxjC0oBt2AhwV0A=
 github.com/natefinch/atomic v1.0.1/go.mod h1:N/D/ELrljoqDyT3rZrsUmtsuzvHkeB/wWjHV22AZRbM=
 github.com/pierrec/lz4 v2.6.1+incompatible h1:9UY3+iC23yxF0UfGaYrGplQ+79Rg+h/q9FV9ix19jjM=
 github.com/pierrec/lz4 v2.6.1+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
+github.com/pkg/browser v0.0.0-20210115035449-ce105d075bb4 h1:Qj1ukM4GlMWXNdMBuXcXfz/Kw9s1qm0CLY32QxuSImI=
+github.com/pkg/browser v0.0.0-20210115035449-ce105d075bb4/go.mod h1:N6UoU20jOqggOuDwUaBQpluzLNDqif3kq9z2wpdYEfQ=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
@@ -255,6 +287,8 @@ github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1 h1:5TQK59W5E3v0r2duFAb7P95B6hEeOyEnHRa8MjYSMTY=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/yosida95/uritemplate/v3 v3.0.2 h1:Ed3Oyj9yrmi9087+NczuL5BwkIc4wvTb5zIM+UJPGz4=
+github.com/yosida95/uritemplate/v3 v3.0.2/go.mod h1:ILOh0sOhIJR3+L/8afwt/kE++YT040gmv5BQTMR2HP4=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
@@ -289,6 +323,8 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 h1:7I4JAnoQBe7ZtJcBaYHi5UtiO8tQHbUSXxL+pnGRANg=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.0.0-20220511200225-c6db032c6c88 h1:Tgea0cVUD0ivh5ADBX4WwuI12DUd2to3nCYe2eayMIw=
+golang.org/x/crypto v0.0.0-20220511200225-c6db032c6c88/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -354,6 +390,8 @@ golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96b
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220325170049-de3da57026de h1:pZB1TWnKi+o4bENlbzAgLrEbY4RMYmUIRobMcSmfeYc=
 golang.org/x/net v0.0.0-20220325170049-de3da57026de/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
+golang.org/x/net v0.0.0-20220425223048-2871e0cb64e4 h1:HVyaeDAYux4pnY+D/SiwmLOR36ewZ4iGQIIrtnuCjFA=
+golang.org/x/net v0.0.0-20220425223048-2871e0cb64e4/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=

src/internal/connector/graphConnector.go

@@ -0,0 +1,121 @@
+// Package connector uploads and retrieves data from M365 through
+// the msgraph-go-sdk.
+package connector
+
+import (
+	"errors"
+	"fmt"
+
+	az "github.com/Azure/azure-sdk-for-go/sdk/azidentity"
+	ka "github.com/microsoft/kiota-authentication-azure-go"
+	msgraphsdk "github.com/microsoftgraph/msgraph-sdk-go"
+	msgraphgocore "github.com/microsoftgraph/msgraph-sdk-go-core"
+	"github.com/microsoftgraph/msgraph-sdk-go/models"
+	msuser "github.com/microsoftgraph/msgraph-sdk-go/users"
+)
+
+// GraphConnector is a struct used to wrap the GraphServiceClient and
+// GraphRequestAdapter from the msgraph-sdk-go. Additional fields are for
+// bookkeeping and interfacing with other component.
+type GraphConnector struct {
+	tenant  string
+	adapter msgraphsdk.GraphRequestAdapter
+	client  msgraphsdk.GraphServiceClient
+	Users   map[string]string //key<email> value<id>
+	Streams string            //Not implemented for ease of code check-in
+}
+
+func NewGraphConnector(tenantId, clientId, secret string) (*GraphConnector, error) {
+	// Client Provider: Uses Secret for access to tenant-level data
+	cred, err := az.NewClientSecretCredential(tenantId, clientId, secret, nil)
+	if err != nil {
+		return nil, err
+	}
+	auth, err := ka.NewAzureIdentityAuthenticationProviderWithScopes(cred, []string{"https://graph.microsoft.com/.default"})
+	if err != nil {
+		return nil, err
+	}
+	adapter, err := msgraphsdk.NewGraphRequestAdapter(auth)
+	if err != nil {
+		return nil, err
+	}
+	gc := GraphConnector{
+		tenant:  tenantId,
+		adapter: *adapter,
+		client:  *msgraphsdk.NewGraphServiceClient(adapter),
+		Users:   make(map[string]string, 0),
+	}
+	// TODO: Revisit Query all users.
+	err = gc.setTenantUsers()
+	if err != nil {
+		return nil, err
+	}
+	return &gc, nil
+}
+
+// setTenantUsers queries the M365 to identify the users in the
+// workspace. The users field is updated during this method
+// iff the return value is true
+func (gc *GraphConnector) setTenantUsers() error {
+	selecting := []string{"id, mail"}
+	errorList := make([]error, 0)
+	requestParams := &msuser.UsersRequestBuilderGetQueryParameters{
+		Select: selecting,
+	}
+	options := &msuser.UsersRequestBuilderGetRequestConfiguration{
+		QueryParameters: requestParams,
+	}
+	response, err := gc.client.Users().GetWithRequestConfigurationAndResponseHandler(options, nil)
+	if err != nil {
+		return err
+	}
+	if response == nil {
+		return errors.New("connector unable to complete queries. Verify credentials")
+	}
+	userIterator, err := msgraphgocore.NewPageIterator(response, &gc.adapter, models.CreateUserCollectionResponseFromDiscriminatorValue)
+	if err != nil {
+		return err
+	}
+	var hasFailed error
+	callbackFunc := func(userItem interface{}) bool {
+		user, ok := userItem.(models.Userable)
+		if !ok {
+			errorList = append(errorList, errors.New("Unable to iterable to user"))
+			return true
+		}
+		gc.Users[*user.GetMail()] = *user.GetId()
+		return true
+	}
+	hasFailed = userIterator.Iterate(callbackFunc)
+	if len(errorList) > 0 {
+		return errors.New(ConvertErrorList(errorList))
+	}
+	return hasFailed
+}
+
+// ConvertsErrorList takes a list of errors and converts returns
+// a string
+func ConvertErrorList(errorList []error) string {
+	errorLog := ""
+	for idx, err := range errorList {
+		errorLog = errorLog + fmt.Sprintf("Error# %d\t%v\n", idx, err)
+	}
+	return errorLog
+}
+
+// GetUsers returns the email address of users within tenant.
+func (gc *GraphConnector) GetUsers() []string {
+	keys := make([]string, 0)
+	for k := range gc.Users {
+		keys = append(keys, k)
+	}
+	return keys
+}
+
+func (gc *GraphConnector) GetUsersIds() []string {
+	values := make([]string, 0)
+	for _, v := range gc.Users {
+		values = append(values, v)
+	}
+	return values
+}

src/internal/connector/graphConnector_test.go

@@ -0,0 +1,67 @@
+package connector_test
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/suite"
+
+	graph "github.com/alcionai/corso/internal/connector"
+)
+
+type GraphConnectorTestSuite struct {
+	suite.Suite
+	connector *graph.GraphConnector
+}
+
+type DiconnectedGraphConnectorTestSuite struct {
+	suite.Suite
+}
+
+func (suite *GraphConnectorTestSuite) SetupSuite() {
+	tenant := os.Getenv("TENANT_ID")
+	client := os.Getenv("CLIENT_ID")
+	secret := os.Getenv("CLIENT_SECRET")
+	if os.Getenv("CI") == "" {
+		var err error
+		suite.connector, err = graph.NewGraphConnector(tenant, client, secret)
+		assert.Nil(suite.T(), err)
+	}
+}
+
+func TestGraphConnectorSuite(t *testing.T) {
+	suite.Run(t, new(GraphConnectorTestSuite))
+}
+
+func TestDisconnectedGraphSuite(t *testing.T) {
+	suite.Run(t, new(DiconnectedGraphConnectorTestSuite))
+}
+
+func (suite *DiconnectedGraphConnectorTestSuite) TestBadConnection() {
+	table := []struct {
+		name   string
+		params []string
+	}{
+		{
+			name:   "Invalid Credentials",
+			params: []string{"Test", "without", "data"},
+		},
+		{
+			name:   "Empty Credentials",
+			params: []string{"", "", ""},
+		},
+	}
+	for _, test := range table {
+		gc, err := graph.NewGraphConnector(test.params[0], test.params[1], test.params[2])
+		assert.Nil(suite.T(), gc, test.name+" failed")
+		assert.NotNil(suite.T(), err, test.name+"failed")
+	}
+}
+
+func (suite *GraphConnectorTestSuite) TestGraphConnector() {
+	if os.Getenv("INTEGRATION_TESTING") != "" {
+		suite.T().Skip("Environmental Variables not set")
+	}
+	suite.True(suite.connector != nil)
+}