From cbf9a74663cde6776cc25db930bb69dc1bbb2ded Mon Sep 17 00:00:00 2001
From: Eugen Neuber <eugen.neuber@tugraz.at>
Date: Fri, 25 Sep 2020 15:17:28 +0200
Subject: [PATCH] Add a provider web component plus demo
See issue #31
---
packages/provider/LICENSE | 502 ++++++++++++++++++
packages/provider/README.md | 35 ++
packages/provider/assets/favicon.ico | Bin 0 -> 2550 bytes
packages/provider/assets/index.html.ejs | 24 +
packages/provider/i18next-scanner.config.js | 15 +
packages/provider/karma.conf.js | 23 +
packages/provider/package.json | 46 ++
packages/provider/rollup.config.js | 104 ++++
packages/provider/src/dbp-provider-demo.js | 338 ++++++++++++
packages/provider/src/dbp-provider.js | 4 +
packages/provider/src/demo.js | 1 +
packages/provider/src/i18n.js | 6 +
.../provider/src/i18n/de/translation.json | 5 +
.../provider/src/i18n/en/translation.json | 5 +
packages/provider/src/index.js | 3 +
packages/provider/src/provider.js | 87 +++
16 files changed, 1198 insertions(+)
create mode 100644 packages/provider/LICENSE
create mode 100644 packages/provider/README.md
create mode 100644 packages/provider/assets/favicon.ico
create mode 100644 packages/provider/assets/index.html.ejs
create mode 100644 packages/provider/i18next-scanner.config.js
create mode 100644 packages/provider/karma.conf.js
create mode 100644 packages/provider/package.json
create mode 100644 packages/provider/rollup.config.js
create mode 100644 packages/provider/src/dbp-provider-demo.js
create mode 100644 packages/provider/src/dbp-provider.js
create mode 100644 packages/provider/src/demo.js
create mode 100644 packages/provider/src/i18n.js
create mode 100644 packages/provider/src/i18n/de/translation.json
create mode 100644 packages/provider/src/i18n/en/translation.json
create mode 100644 packages/provider/src/index.js
create mode 100644 packages/provider/src/provider.js
diff --git a/packages/provider/LICENSE b/packages/provider/LICENSE
new file mode 100644
index 00000000..4362b491
--- /dev/null
+++ b/packages/provider/LICENSE
@@ -0,0 +1,502 @@
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL. It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software--to make sure the software is free for all its users.
+
+ This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it. You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations below.
+
+ When we speak of free software, we are referring to freedom of use,
+not price. Our General Public Licenses are designed to make sure that
+you have the freedom to distribute copies of free software (and charge
+for this service if you wish); that you receive source code or can get
+it if you want it; that you can change the software and use pieces of
+it in new free programs; and that you are informed that you can do
+these things.
+
+ To protect your rights, we need to make restrictions that forbid
+distributors to deny you these rights or to ask you to surrender these
+rights. These restrictions translate to certain responsibilities for
+you if you distribute copies of the library or if you modify it.
+
+ For example, if you distribute copies of the library, whether gratis
+or for a fee, you must give the recipients all the rights that we gave
+you. You must make sure that they, too, receive or can get the source
+code. If you link other code with the library, you must provide
+complete object files to the recipients, so that they can relink them
+with the library after making changes to the library and recompiling
+it. And you must show them these terms so they know their rights.
+
+ We protect your rights with a two-step method: (1) we copyright the
+library, and (2) we offer you this license, which gives you legal
+permission to copy, distribute and/or modify the library.
+
+ To protect each distributor, we want to make it very clear that
+there is no warranty for the free library. Also, if the library is
+modified by someone else and passed on, the recipients should know
+that what they have is not the original version, so that the original
+author's reputation will not be affected by problems that might be
+introduced by others.
+
+ Finally, software patents pose a constant threat to the existence of
+any free program. We wish to make sure that a company cannot
+effectively restrict the users of a free program by obtaining a
+restrictive license from a patent holder. Therefore, we insist that
+any patent license obtained for a version of the library must be
+consistent with the full freedom of use specified in this license.
+
+ Most GNU software, including some libraries, is covered by the
+ordinary GNU General Public License. This license, the GNU Lesser
+General Public License, applies to certain designated libraries, and
+is quite different from the ordinary General Public License. We use
+this license for certain libraries in order to permit linking those
+libraries into non-free programs.
+
+ When a program is linked with a library, whether statically or using
+a shared library, the combination of the two is legally speaking a
+combined work, a derivative of the original library. The ordinary
+General Public License therefore permits such linking only if the
+entire combination fits its criteria of freedom. The Lesser General
+Public License permits more lax criteria for linking other code with
+the library.
+
+ We call this license the "Lesser" General Public License because it
+does Less to protect the user's freedom than the ordinary General
+Public License. It also provides other free software developers Less
+of an advantage over competing non-free programs. These disadvantages
+are the reason we use the ordinary General Public License for many
+libraries. However, the Lesser license provides advantages in certain
+special circumstances.
+
+ For example, on rare occasions, there may be a special need to
+encourage the widest possible use of a certain library, so that it becomes
+a de-facto standard. To achieve this, non-free programs must be
+allowed to use the library. A more frequent case is that a free
+library does the same job as widely used non-free libraries. In this
+case, there is little to gain by limiting the free library to free
+software only, so we use the Lesser General Public License.
+
+ In other cases, permission to use a particular library in non-free
+programs enables a greater number of people to use a large body of
+free software. For example, permission to use the GNU C Library in
+non-free programs enables many more people to use the whole GNU
+operating system, as well as its variant, the GNU/Linux operating
+system.
+
+ Although the Lesser General Public License is Less protective of the
+users' freedom, it does ensure that the user of a program that is
+linked with the Library has the freedom and the wherewithal to run
+that program using a modified version of the Library.
+
+ The precise terms and conditions for copying, distribution and
+modification follow. Pay close attention to the difference between a
+"work based on the library" and a "work that uses the library". The
+former contains code derived from the library, whereas the latter must
+be combined with the library in order to run.
+
+ GNU LESSER GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License Agreement applies to any software library or other
+program which contains a notice placed by the copyright holder or
+other authorized party saying it may be distributed under the terms of
+this Lesser General Public License (also called "this License").
+Each licensee is addressed as "you".
+
+ A "library" means a collection of software functions and/or data
+prepared so as to be conveniently linked with application programs
+(which use some of those functions and data) to form executables.
+
+ The "Library", below, refers to any such software library or work
+which has been distributed under these terms. A "work based on the
+Library" means either the Library or any derivative work under
+copyright law: that is to say, a work containing the Library or a
+portion of it, either verbatim or with modifications and/or translated
+straightforwardly into another language. (Hereinafter, translation is
+included without limitation in the term "modification".)
+
+ "Source code" for a work means the preferred form of the work for
+making modifications to it. For a library, complete source code means
+all the source code for all modules it contains, plus any associated
+interface definition files, plus the scripts used to control compilation
+and installation of the library.
+
+ Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running a program using the Library is not restricted, and output from
+such a program is covered only if its contents constitute a work based
+on the Library (independent of the use of the Library in a tool for
+writing it). Whether that is true depends on what the Library does
+and what the program that uses the Library does.
+
+ 1. You may copy and distribute verbatim copies of the Library's
+complete source code as you receive it, in any medium, provided that
+you conspicuously and appropriately publish on each copy an
+appropriate copyright notice and disclaimer of warranty; keep intact
+all the notices that refer to this License and to the absence of any
+warranty; and distribute a copy of this License along with the
+Library.
+
+ You may charge a fee for the physical act of transferring a copy,
+and you may at your option offer warranty protection in exchange for a
+fee.
+
+ 2. You may modify your copy or copies of the Library or any portion
+of it, thus forming a work based on the Library, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+ a) The modified work must itself be a software library.
+
+ b) You must cause the files modified to carry prominent notices
+ stating that you changed the files and the date of any change.
+
+ c) You must cause the whole of the work to be licensed at no
+ charge to all third parties under the terms of this License.
+
+ d) If a facility in the modified Library refers to a function or a
+ table of data to be supplied by an application program that uses
+ the facility, other than as an argument passed when the facility
+ is invoked, then you must make a good faith effort to ensure that,
+ in the event an application does not supply such function or
+ table, the facility still operates, and performs whatever part of
+ its purpose remains meaningful.
+
+ (For example, a function in a library to compute square roots has
+ a purpose that is entirely well-defined independent of the
+ application. Therefore, Subsection 2d requires that any
+ application-supplied function or table used by this function must
+ be optional: if the application does not supply it, the square
+ root function must still compute square roots.)
+
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Library,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based
+on the Library, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote
+it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Library.
+
+In addition, mere aggregation of another work not based on the Library
+with the Library (or with a work based on the Library) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+ 3. You may opt to apply the terms of the ordinary GNU General Public
+License instead of this License to a given copy of the Library. To do
+this, you must alter all the notices that refer to this License, so
+that they refer to the ordinary GNU General Public License, version 2,
+instead of to this License. (If a newer version than version 2 of the
+ordinary GNU General Public License has appeared, then you can specify
+that version instead if you wish.) Do not make any other change in
+these notices.
+
+ Once this change is made in a given copy, it is irreversible for
+that copy, so the ordinary GNU General Public License applies to all
+subsequent copies and derivative works made from that copy.
+
+ This option is useful when you wish to copy part of the code of
+the Library into a program that is not a library.
+
+ 4. You may copy and distribute the Library (or a portion or
+derivative of it, under Section 2) in object code or executable form
+under the terms of Sections 1 and 2 above provided that you accompany
+it with the complete corresponding machine-readable source code, which
+must be distributed under the terms of Sections 1 and 2 above on a
+medium customarily used for software interchange.
+
+ If distribution of object code is made by offering access to copy
+from a designated place, then offering equivalent access to copy the
+source code from the same place satisfies the requirement to
+distribute the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+ 5. A program that contains no derivative of any portion of the
+Library, but is designed to work with the Library by being compiled or
+linked with it, is called a "work that uses the Library". Such a
+work, in isolation, is not a derivative work of the Library, and
+therefore falls outside the scope of this License.
+
+ However, linking a "work that uses the Library" with the Library
+creates an executable that is a derivative of the Library (because it
+contains portions of the Library), rather than a "work that uses the
+library". The executable is therefore covered by this License.
+Section 6 states terms for distribution of such executables.
+
+ When a "work that uses the Library" uses material from a header file
+that is part of the Library, the object code for the work may be a
+derivative work of the Library even though the source code is not.
+Whether this is true is especially significant if the work can be
+linked without the Library, or if the work is itself a library. The
+threshold for this to be true is not precisely defined by law.
+
+ If such an object file uses only numerical parameters, data
+structure layouts and accessors, and small macros and small inline
+functions (ten lines or less in length), then the use of the object
+file is unrestricted, regardless of whether it is legally a derivative
+work. (Executables containing this object code plus portions of the
+Library will still fall under Section 6.)
+
+ Otherwise, if the work is a derivative of the Library, you may
+distribute the object code for the work under the terms of Section 6.
+Any executables containing that work also fall under Section 6,
+whether or not they are linked directly with the Library itself.
+
+ 6. As an exception to the Sections above, you may also combine or
+link a "work that uses the Library" with the Library to produce a
+work containing portions of the Library, and distribute that work
+under terms of your choice, provided that the terms permit
+modification of the work for the customer's own use and reverse
+engineering for debugging such modifications.
+
+ You must give prominent notice with each copy of the work that the
+Library is used in it and that the Library and its use are covered by
+this License. You must supply a copy of this License. If the work
+during execution displays copyright notices, you must include the
+copyright notice for the Library among them, as well as a reference
+directing the user to the copy of this License. Also, you must do one
+of these things:
+
+ a) Accompany the work with the complete corresponding
+ machine-readable source code for the Library including whatever
+ changes were used in the work (which must be distributed under
+ Sections 1 and 2 above); and, if the work is an executable linked
+ with the Library, with the complete machine-readable "work that
+ uses the Library", as object code and/or source code, so that the
+ user can modify the Library and then relink to produce a modified
+ executable containing the modified Library. (It is understood
+ that the user who changes the contents of definitions files in the
+ Library will not necessarily be able to recompile the application
+ to use the modified definitions.)
+
+ b) Use a suitable shared library mechanism for linking with the
+ Library. A suitable mechanism is one that (1) uses at run time a
+ copy of the library already present on the user's computer system,
+ rather than copying library functions into the executable, and (2)
+ will operate properly with a modified version of the library, if
+ the user installs one, as long as the modified version is
+ interface-compatible with the version that the work was made with.
+
+ c) Accompany the work with a written offer, valid for at
+ least three years, to give the same user the materials
+ specified in Subsection 6a, above, for a charge no more
+ than the cost of performing this distribution.
+
+ d) If distribution of the work is made by offering access to copy
+ from a designated place, offer equivalent access to copy the above
+ specified materials from the same place.
+
+ e) Verify that the user has already received a copy of these
+ materials or that you have already sent this user a copy.
+
+ For an executable, the required form of the "work that uses the
+Library" must include any data and utility programs needed for
+reproducing the executable from it. However, as a special exception,
+the materials to be distributed need not include anything that is
+normally distributed (in either source or binary form) with the major
+components (compiler, kernel, and so on) of the operating system on
+which the executable runs, unless that component itself accompanies
+the executable.
+
+ It may happen that this requirement contradicts the license
+restrictions of other proprietary libraries that do not normally
+accompany the operating system. Such a contradiction means you cannot
+use both them and the Library together in an executable that you
+distribute.
+
+ 7. You may place library facilities that are a work based on the
+Library side-by-side in a single library together with other library
+facilities not covered by this License, and distribute such a combined
+library, provided that the separate distribution of the work based on
+the Library and of the other library facilities is otherwise
+permitted, and provided that you do these two things:
+
+ a) Accompany the combined library with a copy of the same work
+ based on the Library, uncombined with any other library
+ facilities. This must be distributed under the terms of the
+ Sections above.
+
+ b) Give prominent notice with the combined library of the fact
+ that part of it is a work based on the Library, and explaining
+ where to find the accompanying uncombined form of the same work.
+
+ 8. You may not copy, modify, sublicense, link with, or distribute
+the Library except as expressly provided under this License. Any
+attempt otherwise to copy, modify, sublicense, link with, or
+distribute the Library is void, and will automatically terminate your
+rights under this License. However, parties who have received copies,
+or rights, from you under this License will not have their licenses
+terminated so long as such parties remain in full compliance.
+
+ 9. You are not required to accept this License, since you have not
+signed it. However, nothing else grants you permission to modify or
+distribute the Library or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
+modifying or distributing the Library (or any work based on the
+Library), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Library or works based on it.
+
+ 10. Each time you redistribute the Library (or any work based on the
+Library), the recipient automatically receives a license from the
+original licensor to copy, distribute, link with or modify the Library
+subject to these terms and conditions. You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties with
+this License.
+
+ 11. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Library at all. For example, if a patent
+license would not permit royalty-free redistribution of the Library by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Library.
+
+If any portion of this section is held invalid or unenforceable under any
+particular circumstance, the balance of the section is intended to apply,
+and the section as a whole is intended to apply in other circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+ 12. If the distribution and/or use of the Library is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Library under this License may add
+an explicit geographical distribution limitation excluding those countries,
+so that distribution is permitted only in or among countries not thus
+excluded. In such case, this License incorporates the limitation as if
+written in the body of this License.
+
+ 13. The Free Software Foundation may publish revised and/or new
+versions of the Lesser General Public License from time to time.
+Such new versions will be similar in spirit to the present version,
+but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Library
+specifies a version number of this License which applies to it and
+"any later version", you have the option of following the terms and
+conditions either of that version or of any later version published by
+the Free Software Foundation. If the Library does not specify a
+license version number, you may choose any version ever published by
+the Free Software Foundation.
+
+ 14. If you wish to incorporate parts of the Library into other free
+programs whose distribution conditions are incompatible with these,
+write to the author to ask for permission. For software which is
+copyrighted by the Free Software Foundation, write to the Free
+Software Foundation; we sometimes make exceptions for this. Our
+decision will be guided by the two goals of preserving the free status
+of all derivatives of our free software and of promoting the sharing
+and reuse of software generally.
+
+ NO WARRANTY
+
+ 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
+LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Libraries
+
+ If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change. You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+ To apply these terms, attach the following notices to the library. It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the library's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the
+ library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+ <signature of Ty Coon>, 1 April 1990
+ Ty Coon, President of Vice
+
+That's all there is to it!
diff --git a/packages/provider/README.md b/packages/provider/README.md
new file mode 100644
index 00000000..6ad4dd38
--- /dev/null
+++ b/packages/provider/README.md
@@ -0,0 +1,35 @@
+# Provider Web Component
+
+[GitLab Repository](git@gitlab.tugraz.at:dbp/web-components/toolkit.git)
+
+## Usage
+
+```html
+<provider></provider>
+```
+
+## Attributes
+
+- `init` (optional): set your vars to values
+ - example `<provider init="foo=bar"></provider>`
+- `id` (optional): set an id, useful for debugging
+ - example `<provider id="p-1"></provider>`
+
+## Local development
+
+```bash
+# get the source
+git clone git@gitlab.tugraz.at:dbp/web-components/toolkit.git
+cd toolkit/packages/provider
+
+# install dependencies (make sure you have npm version 4+ installed, so symlinks to the git submodules are created automatically)
+yarn install
+
+# constantly build dist/bundle.js and run a local web-server on port 8002
+yarn run watch
+
+# run tests
+yarn test
+```
+
+Jump to <http://localhost:8002> and you should get a demo page.
diff --git a/packages/provider/assets/favicon.ico b/packages/provider/assets/favicon.ico
new file mode 100644
index 0000000000000000000000000000000000000000..f6cf22d1afc22f071d2b64c7779bc5214c3adae5
GIT binary patch
literal 2550
zcmeH{J!@1^5Qg9Qfi}@C1S=tFL@SHw1R=k|!X_wkl3I{dku4;hA_M{lL{exWVu~Os
z1S^fr9!$4EB!X-a459`s0v5+-W+QHv-9Sty-ek_b^WOP*?wq?<8qpCo8sdCX)5oRr
z(yl+I>0{D;v<t3bW0=SJF)<RS?$UEzYelP?S6lT<(cAVnwKq5Q;OTQ@<6gotRwQ?g
z#n24RTqEB@5_;kyp(pf&?r9l4qi39qp3ym}pcnLlUJwd;#jp6aMA=G1qqtGXNHRDb
z$zU)T3<iV2U<f1_3<iV2U@#a069$99U@#aAhCqkGU@#aA27|$9U~m{5796$vctMi5
z&RD_F{gGiwG*2{26iu+i7`U0ZNU$VWVk~eZI1(HQjs!=H3XTLrf+4}+qf2lk7!nM{
zpPMyCNT2Q>evH?r0~Nh9Q88+IXP7cgGYv9KnckV3nIf6qnclG-(Houqnf{snzD1e-
znb~9*G7Opb#J7#9#M7g2X7z1k28DhFwgN|?Uu>;&FoOa|aSk3Vwwt5^OM#^TQD_*i
z04#;XLQp{{u<(yjhdn8<6rV@1_}k#SfCfW_p~6sMs4!F*;&p<dz))eRFccUlgAory
zg`vVwVW2dI4nu{Z!cYOI^e+^vBvyhFH4=V;qeg9yNgCG^O-@c~W@binb8}i)SWv6g
z((>}M*4Njyv9X~}r=zW{Ep2aaYiDOi-+xv;UR+eO*<`x@8}JkL!t=WBRy}G@sd4mn
z*v(Pt!_taYX0PkU*(t3qz1IAzdA*#yrz<B$_5Rc|T|0M2FK(UD)yp6C?%`L>uKv*H
zOH*2FtjRhnYF&IoheIDnIC_ih_1%j@zADy!zenswML;)xxAGnbt>5njILLK(wlVIQ
z^CxEQ)*SEJUA~iU_4KaAUi^vQ`<)$&))Rb#{~!BJpnvN7#SXgnxB2~fgM9DTum5J~
r*9Z9r$sZIutmdHDLE3)#9zX2p&l?suOh0V?u)6<--anm#erJ9GA@oeM
literal 0
HcmV?d00001
diff --git a/packages/provider/assets/index.html.ejs b/packages/provider/assets/index.html.ejs
new file mode 100644
index 00000000..0ce3cd32
--- /dev/null
+++ b/packages/provider/assets/index.html.ejs
@@ -0,0 +1,24 @@
+<!doctype html>
+<html>
+<head>
+ <meta charset="UTF-8">
+ <script type="module" src="dbp-provider-demo.js"></script>
+ <!--
+ This is for debugging only:
+ - requests no provider can answer bubble up to the top
+ - unhandled requests are logged in the console
+ -->
+ <script>
+ window.addEventListener('inherit', e => console.log('window eventListener("inherit",..) name "' + e.detail.name + '" not found.'));
+ window.addEventListener('subscribe', e => console.log('window eventListener("subscribe",..) name "' + e.detail.name + '" not found.'));
+ window.addEventListener('unsubscribe', e => console.log('window eventListener("unsubscribe",..) name "' + e.detail.name + '" not found.'));
+ </script>
+</head>
+
+<body>
+
+<dbp-provider-demo lang="de"></dbp-provider-demo>
+
+<p>version: <span style="color: white; background-color: black;"><%= buildInfo.info %></span></p>
+</body>
+</html>
diff --git a/packages/provider/i18next-scanner.config.js b/packages/provider/i18next-scanner.config.js
new file mode 100644
index 00000000..8c277798
--- /dev/null
+++ b/packages/provider/i18next-scanner.config.js
@@ -0,0 +1,15 @@
+module.exports = {
+ input: [
+ 'src/*.js',
+ ],
+ output: './',
+ options: {
+ debug: false,
+ removeUnusedKeys: true,
+ lngs: ['en','de'],
+ resource: {
+ loadPath: 'src/i18n/{{lng}}/{{ns}}.json',
+ savePath: 'src/i18n/{{lng}}/{{ns}}.json'
+ },
+ },
+}
diff --git a/packages/provider/karma.conf.js b/packages/provider/karma.conf.js
new file mode 100644
index 00000000..6a646f5e
--- /dev/null
+++ b/packages/provider/karma.conf.js
@@ -0,0 +1,23 @@
+// Trick to use the auto-downloaded puppeteer chrome binary
+process.env.CHROME_BIN = require('puppeteer').executablePath();
+
+module.exports = function(config) {
+ config.set({
+ basePath: 'dist',
+ frameworks: ['mocha', 'chai'],
+ files: [
+ {pattern: './*.js', included: true, watched: true, served: true, type: 'module'},
+ {pattern: './**/*', included: false, watched: true, served: true},
+ ],
+ autoWatch: true,
+ browsers: ['ChromeHeadlessNoSandbox'],
+ customLaunchers: {
+ ChromeHeadlessNoSandbox: {
+ base: 'ChromeHeadless',
+ flags: ['--no-sandbox']
+ }
+ },
+ singleRun: false,
+ logLevel: config.LOG_ERROR
+ });
+}
diff --git a/packages/provider/package.json b/packages/provider/package.json
new file mode 100644
index 00000000..12108dc2
--- /dev/null
+++ b/packages/provider/package.json
@@ -0,0 +1,46 @@
+{
+ "name": "dbp-provider",
+ "version": "1.0.0",
+ "main": "src/index.js",
+ "license": "LGPL-2.1-or-later",
+ "private": true,
+ "devDependencies": {
+ "@rollup/plugin-commonjs": "^14.0.0",
+ "@rollup/plugin-json": "^4.1.0",
+ "@rollup/plugin-node-resolve": "^8.1.0",
+ "@rollup/plugin-url": "^5.0.1",
+ "chai": "^4.2.0",
+ "i18next-scanner": "^2.10.2",
+ "karma": "^5.1.0",
+ "karma-chai": "^0.1.0",
+ "karma-chrome-launcher": "^3.0.0",
+ "karma-mocha": "^2.0.1",
+ "mocha": "^8.0.1",
+ "puppeteer": "^2.1.1",
+ "rollup": "^2.19.0",
+ "rollup-plugin-consts": "^1.0.1",
+ "rollup-plugin-copy": "^3.1.0",
+ "rollup-plugin-delete": "^2.0.0",
+ "rollup-plugin-serve": "^1.0.1",
+ "rollup-plugin-terser": "^6.1.0"
+ },
+ "dependencies": {
+ "@open-wc/scoped-elements": "^1.1.1",
+ "lit-element": "^2.3.1",
+ "dbp-auth": "^1.0.0",
+ "dbp-common": "^1.0.0"
+ },
+ "scripts": {
+ "clean": "rm dist/*",
+ "build-local": "rollup -c",
+ "build-dev": "rollup -c --environment BUILD:development",
+ "build-prod": "rollup -c --environment BUILD:production",
+ "build-demo": "rollup -c --environment BUILD:demo",
+ "build-test": "rollup -c --environment BUILD:test",
+ "i18next": "i18next-scanner",
+ "watch": "rollup -c --watch",
+ "watch-local": "yarn run watch",
+ "watch-dev": "rollup -c --watch --environment BUILD:development",
+ "test": "rollup -c --environment BUILD:test && karma start --singleRun"
+ }
+}
diff --git a/packages/provider/rollup.config.js b/packages/provider/rollup.config.js
new file mode 100644
index 00000000..469b12bc
--- /dev/null
+++ b/packages/provider/rollup.config.js
@@ -0,0 +1,104 @@
+import glob from 'glob';
+import resolve from '@rollup/plugin-node-resolve';
+import commonjs from '@rollup/plugin-commonjs';
+import copy from 'rollup-plugin-copy';
+import {terser} from "rollup-plugin-terser";
+import json from '@rollup/plugin-json';
+import serve from 'rollup-plugin-serve';
+import url from "@rollup/plugin-url";
+import consts from 'rollup-plugin-consts';
+import del from 'rollup-plugin-delete';
+import emitEJS from 'rollup-plugin-emit-ejs'
+import {getPackagePath} from '../../rollup.utils.js';
+
+const pkg = require('./package.json');
+const build = (typeof process.env.BUILD !== 'undefined') ? process.env.BUILD : 'local';
+console.log("build: " + build);
+
+function getBuildInfo() {
+ const child_process = require('child_process');
+ const url = require('url');
+
+ let remote = child_process.execSync('git config --get remote.origin.url').toString().trim();
+ let commit = child_process.execSync('git rev-parse --short HEAD').toString().trim();
+
+ let parsed = url.parse(remote);
+ // convert git urls
+ if (parsed.protocol === null) {
+ parsed = url.parse('git://' + remote.replace(":", "/"));
+ parsed.protocol = 'https:';
+ }
+ let newPath = parsed.path.slice(0, parsed.path.lastIndexOf('.'));
+ let newUrl = parsed.protocol + '//' + parsed.host + newPath + '/commit/' + commit;
+
+ return {
+ info: commit,
+ url: newUrl,
+ time: new Date().toISOString(),
+ env: build
+ }
+}
+
+export default (async () => {
+ return {
+ input: (build != 'test') ? ['src/dbp-provider.js', 'src/dbp-provider-demo.js'] : glob.sync('test/**/*.js'),
+ output: {
+ dir: 'dist',
+ entryFileNames: '[name].js',
+ chunkFileNames: 'shared/[name].[hash].[format].js',
+ format: 'esm',
+ sourcemap: true
+ },
+ onwarn: function (warning, warn) {
+ // keycloak bundled code uses eval
+ if (warning.code === 'EVAL') {
+ return;
+ }
+ warn(warning);
+ },
+ plugins: [
+ del({
+ targets: 'dist/*'
+ }),
+ consts({
+ environment: build,
+ buildInfo: getBuildInfo(),
+ }),
+ emitEJS({
+ src: 'assets',
+ include: ['**/*.ejs', '**/.*.ejs'],
+ data: {
+ getUrl: (p) => {
+ return url.resolve(basePath, p);
+ },
+ getPrivateUrl: (p) => {
+ return url.resolve(`${basePath}local/${pkg.name}/`, p);
+ },
+ name: pkg.name,
+ environment: build,
+ buildInfo: getBuildInfo()
+ }
+ }),
+ resolve(),
+ commonjs(),
+ url({
+ limit: 0,
+ include: [
+ await getPackagePath('select2', '**/*.css'),
+ ],
+ emitFiles: true,
+ fileName: 'shared/[name].[hash][extname]'
+ }),
+ json(),
+ (build !== 'local' && build !== 'test') ? terser() : false,
+ copy({
+ targets: [
+ {src: 'assets/index.html', dest: 'dist'},
+ {src: await getPackagePath('dbp-common', 'assets/icons/*.svg'), dest: 'dist/local/dbp-common/icons'},
+ {src: 'assets/favicon.ico', dest:'dist'},
+ ],
+ }),
+ (process.env.ROLLUP_WATCH === 'true') ? serve({contentBase: 'dist', host: '127.0.0.1', port: 8002}) : false
+ ]
+ };
+})();
\ No newline at end of file
diff --git a/packages/provider/src/dbp-provider-demo.js b/packages/provider/src/dbp-provider-demo.js
new file mode 100644
index 00000000..b11ddd90
--- /dev/null
+++ b/packages/provider/src/dbp-provider-demo.js
@@ -0,0 +1,338 @@
+import {i18n} from './i18n.js';
+import {css, html, LitElement} from 'lit-element';
+import {ScopedElementsMixin} from '@open-wc/scoped-elements';
+import {AuthKeycloak, LoginButton} from 'dbp-auth';
+import * as commonUtils from 'dbp-common/utils';
+import * as commonStyles from 'dbp-common/styles';
+import {Provider} from 'dbp-provider';
+
+
+class ProviderDemo extends ScopedElementsMixin(LitElement) {
+
+ constructor() {
+ super();
+ this.lang = 'de';
+ }
+
+ static get scopedElements() {
+ return {
+ 'dbp-auth-keycloak': AuthKeycloak,
+ 'dbp-login-button': LoginButton,
+ 'dbp-provider': Provider,
+ 'dbp-consumer': DemoConsumer,
+ };
+ }
+
+ static get properties() {
+ return {
+ lang: { type: String },
+ };
+ }
+
+ connectedCallback() {
+ super.connectedCallback();
+ i18n.changeLanguage(this.lang);
+ }
+
+ static get styles() {
+ // language=css
+ return [
+ commonStyles.getThemeCSS(),
+ commonStyles.getGeneralCSS(),
+ css`
+ h1.title {margin-bottom: 1em;}
+ div.container {margin-bottom: 1.5em; padding-left:20px;}
+ `
+ ];
+ }
+
+ render() {
+ return html`
+ <section class="section">
+ <p>Provider <em>"root"</em> is the top most in hirachy:</p>
+ <dbp-provider id="root"
+ init="availability=global"
+ ></dbp-provider>
+<pre>
+<dbp-provider id="root" init="availability=global" ></dbp-provider>
+</pre>
+ <div class="container">
+ <h1 class="title">Provider-Demo</h1>
+ </div>
+ <div class="container">
+ <dbp-auth-keycloak lang="${this.lang}" url="https://auth-dev.tugraz.at/auth" realm="tugraz" client-id="auth-dev-mw-frontend-local" load-person try-login></dbp-auth-keycloak>
+ <dbp-login-button lang="${this.lang}" show-image></dbp-login-button>
+ </div>
+ <div class="container">
+ <h2>Provider</h2>
+ <p>Provider <em>"demo"</em> has only <em>border-color</em> to offer:</p>
+ <dbp-provider id="demo"
+ init="bc=blue"
+ ></dbp-provider>
+<pre>
+<dbp-provider id="demo" init="bc=blue" ></dbp-provider>
+</pre>
+ <p>Provider <em>"foo-bar"</em> has some values in its store:</p>
+ <dbp-provider id="foo-bar"
+ init="foo=9,bar=20"
+ ></dbp-provider>
+<pre>
+<dbp-provider id="foo-bar" init="foo=9,bar=20" ></dbp-provider>
+</pre>
+ <h2>Consumer</h2>
+ <p>Consumer <em>"c1"</em> will only subscribe to <em>border-color</em></p>
+<pre>
+<dbp-consumer id="c1" subscribe="bc:border-color" ></dbp-consumer>
+</pre>
+ <dbp-consumer id="c1"
+ subscribe="bc:border-color"
+ ></dbp-consumer>
+ <p>Consumer <em>"c2"</em> subscribes to <em>foo</em></p>
+<pre>
+<dbp-consumer id="c2" subscribe="foo:foo" ></dbp-consumer>
+</pre>
+ <dbp-consumer id="c2"
+ subscribe="foo:foo"
+ ></dbp-consumer>
+ <p>Consumer <em>"c3"</em> subscribes for <em>status</em> wich is provided as <em>availability</em></p>
+<pre>
+<dbp-consumer id="c3" subscribe="availability:status" border-color="orange" ></dbp-consumer>
+</pre>
+ <dbp-consumer id="c3"
+ subscribe="availability:status"
+ border-color="orange"
+ ></dbp-consumer>
+ <p>Consumer <em>"c4"</em> subscribes for <em>status</em> wich is provided as <em>unknown-name</em> which does not exist...</p>
+<pre>
+<dbp-consumer id="c4" subscribe="unknown-name:status" border-color="darkgray" ></dbp-consumer>
+</pre>
+ <dbp-consumer id="c4"
+ subscribe="unknown-name:status"
+ border-color="darkgray"
+ ></dbp-consumer>
+ </div>
+ </section>
+ `;
+ }
+}
+
+commonUtils.defineCustomElement('dbp-provider-demo', ProviderDemo);
+
+// =======================================================
+
+class Consumer extends HTMLElement {
+ constructor() {
+ super();
+ this.connected = false;
+ this.deferInherited = false;
+ this.deferSubscribe = false;
+ this.deferUnSubscribe = false;
+
+ // default values
+ this.inherit = '';
+ this.subscribe = '';
+ this.unsubscribe = '';
+
+ this.attachShadow({mode: 'open'});
+ console.log('Consumer constructor()');
+ }
+
+ connectedCallback() {
+ console.log('Consumer(' + this.id() + ') connectedCallback()');
+
+ if (this.deferInherited) {
+ const attrs = this.inherit.split(',');
+ attrs.forEach(element => this.askProviderFor(element));
+ this.deferInherited = false;
+ }
+ if (this.deferUnSubscribe) {
+ const attrs = this.unsubscribe.split(',');
+ attrs.forEach(element => this.subscribeProviderFor(element));
+ this.deferSubscribe = false;
+ this.unsubscribe = '';
+ }
+ if (this.deferSubscribe) {
+ const attrs = this.subscribe.split(',');
+ attrs.forEach(element => this.subscribeProviderFor(element));
+ this.deferSubscribe = false;
+ }
+ this.connected = true;
+ }
+
+ static get observedAttributes() {
+ return ['inherit', 'subscribe'];
+ }
+
+ attributeChangedCallback(name, oldValue, newValue) {
+ console.log('Consumer(' + this.id() + ') attributeChangesCallback( ' + name + ', ' + oldValue + ', ' + newValue + ')');
+ switch(name) {
+ case 'inherit':
+ this.inherit = newValue;
+ if (this.connected && typeof newValue === 'string') {
+ const attrs = newValue.split(',');
+ attrs.forEach(element => this.askProviderFor(element));
+ } else {
+ this.deferInherited = newValue.length > 0;
+ }
+ break;
+ case 'subscribe':
+ if (this.subscribe && this.subscribe.length > 0) {
+ if (this.connected) {
+ const attrs = this.subscribe.split(',');
+ attrs.forEach(element => this.unSubscribeProviderFor(element));
+ } else {
+ this.deferUnSubscribe = this.subscribe.length > 0;
+ this.unsubscribe = this.subscribe;
+ }
+ }
+ if (newValue !== null) {
+ this.subscribe = newValue;
+ if (this.connected) {
+ const attrs = newValue.split(',');
+ attrs.forEach(element => this.subscribeProviderFor(element));
+ } else {
+ this.deferSubscribe = newValue && newValue.length > 0;
+ }
+ }
+ break;
+ default:
+ console.log('unknown attribute "' + name + '".');
+ }
+ }
+
+ id() {
+ return this.getAttribute('id');
+ }
+
+ render() {}
+
+ askProviderFor(element) {
+ console.log('Consumer(' + this.id() + ') askProviderFor( ' + element + ' )');
+ const pair = element.trim().split(':');
+ const global = pair[0];
+ const local = pair[1];
+ const that = this;
+ const event = new CustomEvent('inherit',
+ {
+ bubbles: true,
+ detail: {
+ name: global,
+ callback: (value) => {
+ console.log('Consumer(' + that.id() + ') ask/Callback ' + global + ' -> ' + local + ' = ' + value);
+ this.attributeChangedCallback(local, that[local], value);
+ }
+ }
+ });
+ this.parentElement.dispatchEvent(event);
+ //console.dir(event);
+ }
+
+ subscribeProviderFor(element) {
+ console.log('Consumer(' + this.id() + ') subscribeProviderFor( ' + element + ' )');
+ const pair = element.trim().split(':');
+ const global = pair[0];
+ const local = pair[1];
+ const that = this;
+ const event = new CustomEvent('subscribe',
+ {
+ bubbles: true,
+ detail: {
+ name: global,
+ callback: (value) => {
+ console.log('Consumer(' + that.id() + ') sub/Callback ' + global + ' -> ' + local + ' = ' + value);
+ this.attributeChangedCallback(local, that[local], value);
+ },
+ sender: this,
+ }
+ });
+ this.parentElement.dispatchEvent(event);
+ }
+
+ unSubscribeProviderFor(element) {
+ console.log('Consumer(' + this.id() + ') unSubscribeProviderFor( ' + element + ' )');
+ const pair = element.trim().split(':');
+ const global = pair[0];
+ const event = new CustomEvent('unsubscribe',
+ {
+ bubbles: true,
+ detail: {
+ name: global,
+ sender: this,
+ }
+ });
+ this.parentElement.dispatchEvent(event);
+ }
+}
+
+class DemoConsumer extends Consumer
+{
+ constructor() {
+ super();
+
+ // default values
+ this.foo = 100;
+ this.bar = 900;
+ this.ping = 0;
+ this['border-color'] = 'green';
+
+ this.status = 'local';
+
+ console.log('DemoConsumer constructor()');
+ }
+
+ connectedCallback() {
+ super.connectedCallback();
+ console.log('DemoConsumer(' + this.id() + ') connectedCallback()');
+ this.render();
+ }
+
+ static get observedAttributes() {
+ return [ ...Consumer.observedAttributes, 'foo', 'bar', 'gong', 'border-color', 'ping'];
+ }
+
+ attributeChangedCallback(name, oldValue, newValue) {
+ console.log('DemoConsumer(' + this.id() + ') attributeChangesCallback( ' + name + ', ' + oldValue + ', ' + newValue + ')');
+ switch(name) {
+ case 'foo':
+ this.foo = parseInt(newValue);
+ break;
+ case 'bar':
+ this.bar = parseInt(newValue);
+ break;
+ case 'status':
+ this.status = newValue;
+ break;
+ case 'border-color':
+ this['border-color'] = newValue;
+ break;
+ default:
+ super.attributeChangedCallback(name, oldValue, newValue);
+ }
+ this.render();
+ }
+
+ render() {
+ if (! this.connected) {
+ return;
+ }
+ console.log('DemoConsumer(' + this.id() + ') render()');
+
+ const sum = this.foo + this.bar;
+ this.shadowRoot.innerHTML = `
+ <div style="border: ${this['border-color']} dotted; padding: 10px;">
+ <table style="width:200px;">
+ <tr style="background-color: #aaa;">
+ <th style="text-align: left;">Item</th>
+ <th style="text-align: right;">Price</th>
+ </tr>
+ <tr><td>foo</td><td style="text-align: right;">${this.foo}</td></tr>
+ <tr><td>bar</td><td style="text-align: right;">${this.bar}</td></tr>
+ <tr><td>sum</td><td style="text-align: right;">${sum}</td></tr>
+ </table>
+ <p>Status: <b>${this.status}</b></p>
+ </div>
+ `;
+ }
+}
+
+customElements.define('dbp-consumer', DemoConsumer);
diff --git a/packages/provider/src/dbp-provider.js b/packages/provider/src/dbp-provider.js
new file mode 100644
index 00000000..ea220fe5
--- /dev/null
+++ b/packages/provider/src/dbp-provider.js
@@ -0,0 +1,4 @@
+import * as commonUtils from 'dbp-common/utils';
+import {Provider} from './provider.js';
+
+commonUtils.defineCustomElement('dbp-provider', Provider);
diff --git a/packages/provider/src/demo.js b/packages/provider/src/demo.js
new file mode 100644
index 00000000..8425d88d
--- /dev/null
+++ b/packages/provider/src/demo.js
@@ -0,0 +1 @@
+import './dbp-provider-demo.js';
\ No newline at end of file
diff --git a/packages/provider/src/i18n.js b/packages/provider/src/i18n.js
new file mode 100644
index 00000000..3fb3a1af
--- /dev/null
+++ b/packages/provider/src/i18n.js
@@ -0,0 +1,6 @@
+import {createInstance} from 'dbp-common/i18next.js';
+
+import de from './i18n/de/translation.json';
+import en from './i18n/en/translation.json';
+
+export const i18n = createInstance({en: en, de: de}, 'de', 'en');
\ No newline at end of file
diff --git a/packages/provider/src/i18n/de/translation.json b/packages/provider/src/i18n/de/translation.json
new file mode 100644
index 00000000..e41d874c
--- /dev/null
+++ b/packages/provider/src/i18n/de/translation.json
@@ -0,0 +1,5 @@
+{
+ "provider": {
+
+ }
+}
\ No newline at end of file
diff --git a/packages/provider/src/i18n/en/translation.json b/packages/provider/src/i18n/en/translation.json
new file mode 100644
index 00000000..e41d874c
--- /dev/null
+++ b/packages/provider/src/i18n/en/translation.json
@@ -0,0 +1,5 @@
+{
+ "provider": {
+
+ }
+}
\ No newline at end of file
diff --git a/packages/provider/src/index.js b/packages/provider/src/index.js
new file mode 100644
index 00000000..34bdc9a6
--- /dev/null
+++ b/packages/provider/src/index.js
@@ -0,0 +1,3 @@
+import {Provider} from './provider.js';
+
+export {Provider};
\ No newline at end of file
diff --git a/packages/provider/src/provider.js b/packages/provider/src/provider.js
new file mode 100644
index 00000000..99066cf2
--- /dev/null
+++ b/packages/provider/src/provider.js
@@ -0,0 +1,87 @@
+export class Provider extends HTMLElement {
+ constructor() {
+ super();
+ this.callbackStore = [];
+
+ console.log('Provider constructor()');
+ }
+
+ static get observedAttributes() {
+ return ['init'];
+ }
+
+ attributeChangedCallback(name, oldValue, newValue) {
+ console.log('Provider(' + this.id() + ') attribute "' + name + '" changed from "' + oldValue + '" to "' + newValue + '".');
+ switch(name) {
+ case 'init':
+ this.init = newValue;
+ if (newValue) {
+ const attrs = newValue.split(',');
+ attrs.forEach(element => {
+ const pair = element.trim().split('=');
+ const name = pair[0].trim();
+ const value = pair[1].trim().replace('"', '').replace("'", '');
+ if (name.length > 0) {
+ this[name] = value;
+ this.callbackStore.forEach(item => {
+ if (item.name === name) {
+ item.callback(value);
+ }
+ });
+ }
+ });
+ }
+ break;
+ default:
+ console.log('unknown attribute "' + name + '".');
+ }
+ }
+
+
+ connectedCallback() {
+ console.log('Provider(' + this.id() + ') connectedCallback()');
+
+ const that = this;
+ const parent = this.parentElement;
+ parent.addEventListener('inherit', function (e) {
+ if (that[e.detail.name]) {
+ console.log('Provider(' + that.id() + ') eventListener("inherit",..) name "' + e.detail.name + '" found.');
+ //console.dir(e.detail);
+ e.detail.callback(that[e.detail.name]);
+ e.stopPropagation();
+ }
+ }, false);
+
+ parent.addEventListener('subscribe', function (e) {
+ const name = e.detail.name;
+ if (that[name]) {
+ console.log('Provider(' + that.id() + ') eventListener("subscribe",..) name "' + name + '" found.');
+ that.callbackStore.push({name: name, callback: e.detail.callback, sender: e.detail.sender});
+
+ e.detail.callback(that[name]);
+ e.stopPropagation();
+ }
+ }, false);
+
+ parent.addEventListener('unsubscribe', function (e) {
+ const name = e.detail.name;
+ const sender = e.detail.sender;
+ if (that[name]) {
+ console.log('Provider(' + that.id() + ') eventListener("unsubscribe",..) name "' + name + '" found.');
+ that.callbackStore.forEach(item => {
+ if (item.sender === sender && item.name === name) {
+ const index = that.callbackStore.indexOf(item);
+ that.callbackStore.splice(index, 1);
+ console.log('Provider(' + that.id() + ') eventListener for name "' + name + '" removed.')
+ }
+ });
+
+ e.stopPropagation();
+ }
+ }, false);
+ }
+
+ id() {
+ return this.getAttribute('id');
+ }
+}
--
GitLab