[Mercadopago] Implemented purchase

.credo.exs

@@ -77,7 +77,7 @@
 
         {Credo.Check.Readability.FunctionNames},
         {Credo.Check.Readability.LargeNumbers},
-        {Credo.Check.Readability.MaxLineLength, priority: :low, max_length: 80},
+        {Credo.Check.Readability.MaxLineLength, priority: :low, max_length: 100},
         {Credo.Check.Readability.ModuleAttributeNames},
         {Credo.Check.Readability.ModuleDoc},
         {Credo.Check.Readability.ModuleNames},

.formatter.exs

@@ -0,0 +1,7 @@
+[
+  inputs: [
+    "{lib,config}/**/*.{ex,exs}", # lib and config
+    "test/**/*.{ex,exs}", # tests
+    "mix.exs"
+  ]
+]

.scripts/inch_report.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -e
+bold=$(tput bold)
+purple='\e[106m'
+normal=$(tput sgr0)
+allowed_branches="^(master)|(develop)$"
+
+echo -e "${bold}${purple}"
+if [ $TRAVIS_PULL_REQUEST = false ]; then
+    if [[ $TRAVIS_BRANCH =~ $allowed_branches ]]; then
+        env MIX_ENV=docs mix deps.get
+        env MIX_ENV=docs mix inch.report
+    else
+        echo "Skipping Inch CI report because this branch does not match on /$allowed_branches/"
+    fi
+else
+    echo "Skipping Inch CI report because this is a PR build"
+fi
+echo -e "${normal}"

.scripts/post-commit

@@ -0,0 +1,12 @@
+#!/bin/sh
+#
+# Runs credo and the formatter on the staged files, after the commit is made
+# This is purely for notification and will not halt/change your commit.
+
+RED='\033[1;31m'
+LGRAY='\033[1;30m'
+NC='\033[0m' # No Color
+
+printf "${RED}Running 'mix credo --strict --format=oneline' on project...${NC}\n"
+mix credo --strict --format=oneline
+echo

.scripts/pre-commit

@@ -0,0 +1,50 @@
+#!/bin/sh
+#
+# An example hook script to verify what is about to be committed.
+# Called by "git commit" with no arguments.  The hook should
+# exit with non-zero status after issuing an appropriate message if
+# it wants to stop the commit.
+#
+# To enable this hook, rename this file to "pre-commit".
+
+if git rev-parse --verify HEAD >/dev/null 2>&1
+then
+	against=HEAD
+else
+	# Initial commit: diff against an empty tree object
+	against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+fi
+
+# If you want to allow non-ASCII filenames set this variable to true.
+allownonascii=$(git config --bool hooks.allownonascii)
+
+# Redirect output to stderr.
+exec 1>&2
+
+# Cross platform projects tend to avoid non-ASCII filenames; prevent
+# them from being added to the repository. We exploit the fact that the
+# printable range starts at the space character and ends with tilde.
+if [ "$allownonascii" != "true" ] &&
+	# Note that the use of brackets around a tr range is ok here, (it's
+	# even required, for portability to Solaris 10's /usr/bin/tr), since
+	# the square bracket bytes happen to fall in the designated range.
+	test $(git diff --cached --name-only --diff-filter=A -z $against |
+	  LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
+then
+	cat <<\EOF
+Error: Attempt to add a non-ASCII file name.
+
+This can cause problems if you want to work with people on other platforms.
+
+To be portable it is advisable to rename the file.
+
+If you know what you are doing you can disable this check using:
+
+  git config hooks.allownonascii true
+EOF
+	exit 1
+fi
+
+# Also run the mix format task, just check though.
+exec mix format --check-formatted
+

.travis.yml

@@ -1,14 +1,28 @@
 language: elixir
-elixir:
-  - 1.5.2
+
 otp_release:
-  - 20.1
+  - 20.2
 before_install:
   - mix local.hex --force
   - mix local.rebar --force
   - mix deps.get
 script:
-  - mix coveralls.travis --include integration
+  - set -e
+  - MIX_ENV=test mix format --check-formatted
+  - set +e
+  - mix coveralls.json --include=integration
 after_script:
-  - MIX_ENV=docs mix deps.get
-  - MIX_ENV=docs mix inch.report
+  - bash <(curl -s https://codecov.io/bash)
+  - bash .scripts/inch_report.sh
+
+matrix:
+  include:
+  - elixir: "1.5.3"
+    script:
+      - mix coveralls.json --include=integration
+  - elixir: "1.6.2"
+
+notifications:
+  email:
+    recipients:
+      - [email protected]

CHANGELOG.md

@@ -0,0 +1,52 @@
+# [`v1.1.0-alpha`][tag-1_1_0_alpha]
+
+## Added
+
+* [`ISS`][iss#80] [`PR`][pr#78]
+Add a `Mix` task that generates a barebones gateway implementation and test suite.
+
+## Changed
+
+* [`ISS`][iss#62] [`PR`][pr#71] [`PR`][pr#86]
+Deprecate use of `floats` for money amounts, introduce the `Gringotts.Money` protocol.
+
+[iss#62]: https://github.com/aviabird/gringotts/issues/62
+[iss#80]: https://github.com/aviabird/gringotts/issues/80
+
+[pr#71]: https://github.com/aviabird/gringotts/pulls/71
+[pr#78]:https://github.com/aviabird/gringotts/pulls/78
+[pr#86]:https://github.com/aviabird/gringotts/pulls/86
+
+# [`v1.0.2`][tag-1_0_2]
+
+## Added
+
+* New Gateway: **Trexle**
+
+## Changed
+
+* Reduced arity of public API calls by 1
+  - No need to pass the name of the `worker` as argument.
+
+# [`v1.0.1`][tag-1_0_1]
+
+## Added
+
+* Improved documentation - made consistent accross gateways
+* Improved test coverage
+
+# [`v1.0.0`][tag-1_0_0]
+
+* Initial public API release.
+* Single worker architecture, config fetched from `config.exs`
+* Supported Gateways:
+  - Stripe
+  - MONEI
+  - Paymill
+  - WireCard
+  - CAMS
+
+[tag-1_1_0_alpha]: https://github.com/aviabird/gringotts/releases/tag/v1.1.0-alpha
+[tag-1_0_2]: https://github.com/aviabird/gringotts/releases/tag/v1.0.2
+[tag-1_0_1]: https://github.com/aviabird/gringotts/releases/tag/v1.0.1
+[tag-1_0_0]: https://github.com/aviabird/gringotts/releases/tag/v1.0.0

CONTRIBUTING.md

@@ -0,0 +1,126 @@
+# Contributing to [`gringotts`][gringotts]
+
+There are many ways to contribute to `gringotts`,
+
+1. [Integrate a new Payment Gateway][wiki-new-gateway].
+2. Expanding the feature coverage of (partially) supported gateways.
+3. Moving forward on the [roadmap][roadmap] or on tasks being tracked in the
+   [milestones][milestones].
+
+We manage our development using [milestones][milestones] and issues so if you're
+a first time contributor, look out for the [`good first issue`][first-issues]
+and the [`hotlist: community-help`][ch-issues] labels on the [issues][issues]
+page.
+
+The docs are hosted on [hexdocs.pm][hexdocs] and are updated for each
+release. **You must build the docs locally using `mix docs` to get the bleeding
+edge developer docs.**
+
+The article on [Gringott's Architecture][wiki-arch] explains how API calls are
+processed.
+
+:exclamation: ***Please base your work on the `dev` branch.***
+
+[roadmap]: https://github.com/aviabird/gringotts/wiki/Roadmap
+[wiki-arch]: https://github.com/aviabird/gringotts/wiki/Architecture
+
+# Style Guidelines
+
+We follow
+[lexmag/elixir-style-guide](https://github.com/lexmag/elixir-style-guide) and
+[rrrene/elixir-style-guide](https://github.com/rrrene/elixir-style-guide) (both
+overlap a lot), and use the elixir formatter.
+
+To enforce these, and also to make it easier for new contributors to adhere to
+our style, we've provided a collection of handy `git-hooks` under the `.scripts/`
+directory.
+
+* `.scripts/pre-commit` Runs the `format --check-formatted` task.
+* `.scripts/post-commit` Runs a customised `credo` check.
+
+While we do not force you to use these hooks, you could write your
+very own by taking inspiration from ours :smile:
+
+To set the `git-hooks` as provided, go to the repo root,
+```sh
+cd path/to/gringotts/
+```
+and make these symbolic links:
+```sh
+ln -s .scripts/pre-commit .git/hooks/pre-commit
+ln -s .scripts/post-commit .git/hooks/post-commit
+```
+
+> Note that our CI will fail your PR if you dont run `mix format` in the project
+> root.
+
+## General Rules
+
+* Keep line length below 100 characters.
+* Complex anonymous functions should be extracted into named functions.
+* One line functions, should only take up one line!
+* Pipes are great, but don't use them if they are less readable than brackets!
+
+## Writing documentation
+
+All our docs are inline and built using [`ExDocs`][exdocs]. Please take a look
+at how the docs are structured for the [MONEI gateway][src-monei] for
+inspiration.
+
+[exdocs]: https://github.com/elixir-lang/ex_doc
+[src-monei]: https://github.com/aviabird/gringotts/blob/dev/lib/gringotts/gateways/monei.ex
+
+## Writing test cases
+
+> This is WIP.
+
+`gringotts` has mock and integration tests. We have currently used
+[`bypass`][bypass] and [`mock`][mock] for mock tests, but we don't recommed
+using `mock` as it constrains tests to run serially. Use [`mox`][mox] instead.\
+Take a look at [MONEI's mock tests][src-monei-tests] for inspiration.
+
+# PR submission checklist
+
+Each PR should introduce a *focussed set of changes*, and ideally not span over
+unrelated modules.
+
+* [ ] Format the project with the Elixir formatter.
+  ```sh
+  cd path/to/gringotts/
+  mix format
+  ```
+* [ ] Run the edited files through [credo][credo] with the `--strict` flag.
+  ```sh
+  cd path/to/gringotts/
+  mix credo --strict
+  ```
+* [ ] Check the test coverage by running `mix coveralls`. 100% coverage is not
+      strictly required.
+* [ ] If the PR introduces a new Gateway or just Gateway specific changes,
+      please format the title like so,\
+      `[<gateway-name>] <the-title>`
+
+> **Note**
+> You can skip the first two steps if you have set up `git-hooks` as we have
+> provided!
+
+[gringotts]: https://github.com/aviabird/gringotts
+[milestones]: https://github.com/aviabird/gringotts/milestones
+[issues]: https://github.com/aviabird/gringotts/issues
+[first-issues]: https://github.com/aviabird/gringotts/issues?q=is%3Aissue+is%3Aopen+label%3A"good+first+issue"
+[ch-issues]: https://github.com/aviabird/gringotts/issues?q=is%3Aissue+is%3Aopen+label%3A"hotfix%3A+community-help"
+[hexdocs]: https://hexdocs.pm/gringotts
+[credo]: https://github.com/rrrene/credo
+
+--------------------------------------------------------------------------------
+
+> **Where to next?**
+> Wanna add a new gateway? Head to our [guide][wiki-new-gateway] for that.
+
+[wiki-new-gateway]: https://github.com/aviabird/gringotts/wiki/Adding-a-new-Gateway
+[bypass]: https://github.com/pspdfkit-labs/bypass
+[mock]: https://github.com/jjh42/mock
+[mox]: https://github.com/plataformatec/mox
+[src-monei-tests]: https://github.com/aviabird/gringotts/blob/dev/test/gateways/monei_test.exs
+[gringotts]: https://github.com/aviabird/gringotts
+[docs]: https://hexdocs.pm/gringotts/Gringotts.html